/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:45:50,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:45:50,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:45:50,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 17:45:50,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 17:45:50,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 17:45:50,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 17:45:50,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 17:45:50,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 17:45:50,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 17:45:50,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 17:45:50,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-01 17:45:50,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-01 17:45:50,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-01 17:45:50,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-01 17:45:50,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-01 17:45:50,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-01 17:45:50,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-01 17:45:50,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-01 17:45:50,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-01 17:45:50,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-01 17:45:50,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-01 17:45:50,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-01 17:45:50,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-01 17:45:50,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-01 17:45:50,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:45:50,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:45:50,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:45:51,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:45:51,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:45:51,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:45:51,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:45:51,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:45:51,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:45:51,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:45:51,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:45:51,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:45:51,034 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:45:51,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:45:51,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:45:51,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:45:51,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:45:51,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:45:51,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:45:51,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:45:51,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:45:51,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:45:51,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:45:51,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:45:51,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:45:51,205 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:45:51,206 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:45:51,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2022-03-01 17:45:51,207 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2022-03-01 17:45:51,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:45:51,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:45:51,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:45:51,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:45:51,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:45:51,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,254 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:45:51,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:45:51,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:45:51,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:45:51,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:45:51,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:45:51,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:45:51,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:45:51,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:45:51,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/1) ... [2022-03-01 17:45:51,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:45:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:51,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:45:51,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:45:51,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:45:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:45:51,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:45:51,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:45:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:45:51,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:45:51,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:45:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:45:51,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:45:51,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:45:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:45:51,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:45:51,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 17:45:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 17:45:51,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 17:45:51,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-03-01 17:45:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-03-01 17:45:51,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-03-01 17:45:51,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-03-01 17:45:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-03-01 17:45:51,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-03-01 17:45:51,368 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:45:51,420 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:45:51,421 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:45:51,575 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:45:51,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:45:51,612 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-01 17:45:51,612 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:45:51,612 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-01 17:45:51,613 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-03-01 17:45:51,613 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-03-01 17:45:51,614 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:45:51 BoogieIcfgContainer [2022-03-01 17:45:51,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:45:51,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:45:51,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:45:51,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:45:51,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:45:51" (1/2) ... [2022-03-01 17:45:51,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c210316 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:45:51, skipping insertion in model container [2022-03-01 17:45:51,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:45:51" (2/2) ... [2022-03-01 17:45:51,639 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2022-03-01 17:45:51,644 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:45:51,645 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:45:51,645 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:45:51,645 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:45:51,775 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-03-01 17:45:51,832 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:45:51,836 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:45:51,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-03-01 17:45:51,858 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2022-03-01 17:45:51,975 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:45:51,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:51,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:51,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash -296525747, now seen corresponding path program 1 times [2022-03-01 17:45:51,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:51,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399112966] [2022-03-01 17:45:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:52,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:52,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399112966] [2022-03-01 17:45:52,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399112966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:52,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:52,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:45:52,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411766106] [2022-03-01 17:45:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:45:52,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:45:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:45:52,171 INFO L87 Difference]: Start difference. First operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:52,322 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2022-03-01 17:45:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:45:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 17:45:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:52,384 INFO L225 Difference]: With dead ends: 1089 [2022-03-01 17:45:52,385 INFO L226 Difference]: Without dead ends: 1068 [2022-03-01 17:45:52,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:52,406 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:52,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 16 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-03-01 17:45:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2022-03-01 17:45:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2022-03-01 17:45:52,554 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2022-03-01 17:45:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:52,555 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2022-03-01 17:45:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2022-03-01 17:45:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:45:52,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:52,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:52,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:45:52,559 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -908802327, now seen corresponding path program 2 times [2022-03-01 17:45:52,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:52,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439586010] [2022-03-01 17:45:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:52,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:52,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439586010] [2022-03-01 17:45:52,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439586010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:52,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:52,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:45:52,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287158239] [2022-03-01 17:45:52,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:45:52,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:45:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:45:52,707 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:52,833 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2022-03-01 17:45:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:45:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 17:45:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:52,840 INFO L225 Difference]: With dead ends: 1218 [2022-03-01 17:45:52,840 INFO L226 Difference]: Without dead ends: 1197 [2022-03-01 17:45:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:52,843 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:52,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-03-01 17:45:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2022-03-01 17:45:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2022-03-01 17:45:52,886 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2022-03-01 17:45:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:52,886 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2022-03-01 17:45:52,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2022-03-01 17:45:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:52,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:52,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:52,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:45:52,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1277738927, now seen corresponding path program 1 times [2022-03-01 17:45:52,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:52,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907969790] [2022-03-01 17:45:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:52,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:52,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907969790] [2022-03-01 17:45:52,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907969790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:52,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:52,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:45:52,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056500589] [2022-03-01 17:45:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:52,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:45:52,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:45:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:45:52,947 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:52,993 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2022-03-01 17:45:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:45:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:52,996 INFO L225 Difference]: With dead ends: 545 [2022-03-01 17:45:52,996 INFO L226 Difference]: Without dead ends: 529 [2022-03-01 17:45:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:45:53,003 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:53,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:45:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-01 17:45:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-03-01 17:45:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2022-03-01 17:45:53,017 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2022-03-01 17:45:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:53,017 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2022-03-01 17:45:53,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2022-03-01 17:45:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:53,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:53,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:53,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:45:53,019 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1945379311, now seen corresponding path program 2 times [2022-03-01 17:45:53,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:53,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041091087] [2022-03-01 17:45:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:53,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:53,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041091087] [2022-03-01 17:45:53,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041091087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:53,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:53,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:53,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631542746] [2022-03-01 17:45:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:53,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:53,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:53,084 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:53,250 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2022-03-01 17:45:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:45:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:53,256 INFO L225 Difference]: With dead ends: 1358 [2022-03-01 17:45:53,257 INFO L226 Difference]: Without dead ends: 1346 [2022-03-01 17:45:53,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:45:53,261 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:53,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 65 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-01 17:45:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2022-03-01 17:45:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2022-03-01 17:45:53,283 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2022-03-01 17:45:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:53,283 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2022-03-01 17:45:53,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2022-03-01 17:45:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:53,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:53,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:45:53,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 58537094, now seen corresponding path program 1 times [2022-03-01 17:45:53,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:53,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617432696] [2022-03-01 17:45:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:53,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:53,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617432696] [2022-03-01 17:45:53,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617432696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:53,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:53,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:45:53,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550998713] [2022-03-01 17:45:53,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:53,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:45:53,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:45:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:45:53,327 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:53,368 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2022-03-01 17:45:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:45:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:53,372 INFO L225 Difference]: With dead ends: 652 [2022-03-01 17:45:53,372 INFO L226 Difference]: Without dead ends: 604 [2022-03-01 17:45:53,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:45:53,375 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:53,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:45:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-01 17:45:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-03-01 17:45:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2022-03-01 17:45:53,388 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2022-03-01 17:45:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:53,388 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2022-03-01 17:45:53,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2022-03-01 17:45:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:53,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:53,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:53,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:45:53,395 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -201923474, now seen corresponding path program 1 times [2022-03-01 17:45:53,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:53,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664662068] [2022-03-01 17:45:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:53,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:53,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664662068] [2022-03-01 17:45:53,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664662068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:53,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121200165] [2022-03-01 17:45:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:53,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:53,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:45:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:53,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:53,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121200165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:53,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:53,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:45:53,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212299246] [2022-03-01 17:45:53,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:53,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:45:53,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:45:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:45:53,694 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:53,790 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2022-03-01 17:45:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:53,795 INFO L225 Difference]: With dead ends: 1057 [2022-03-01 17:45:53,795 INFO L226 Difference]: Without dead ends: 989 [2022-03-01 17:45:53,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:53,796 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:53,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 46 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-03-01 17:45:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2022-03-01 17:45:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2022-03-01 17:45:53,811 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2022-03-01 17:45:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:53,812 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2022-03-01 17:45:53,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2022-03-01 17:45:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:53,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:53,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:53,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-01 17:45:54,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash 456470348, now seen corresponding path program 2 times [2022-03-01 17:45:54,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:54,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667596901] [2022-03-01 17:45:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:54,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:54,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667596901] [2022-03-01 17:45:54,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667596901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:54,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:54,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:54,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100968570] [2022-03-01 17:45:54,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:54,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:54,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:54,081 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:54,195 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2022-03-01 17:45:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:45:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:54,199 INFO L225 Difference]: With dead ends: 990 [2022-03-01 17:45:54,199 INFO L226 Difference]: Without dead ends: 963 [2022-03-01 17:45:54,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:54,200 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:54,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 53 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-01 17:45:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2022-03-01 17:45:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2022-03-01 17:45:54,217 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2022-03-01 17:45:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:54,217 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2022-03-01 17:45:54,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2022-03-01 17:45:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:54,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:54,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:54,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:45:54,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 633650655, now seen corresponding path program 3 times [2022-03-01 17:45:54,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:54,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085775801] [2022-03-01 17:45:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:54,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085775801] [2022-03-01 17:45:54,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085775801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:54,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138491208] [2022-03-01 17:45:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:45:54,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:54,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:54,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:54,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:45:54,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:45:54,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:45:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138491208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:54,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:54,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:45:54,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338062446] [2022-03-01 17:45:54,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:45:54,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:45:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:45:54,435 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:54,522 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2022-03-01 17:45:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:54,527 INFO L225 Difference]: With dead ends: 1033 [2022-03-01 17:45:54,527 INFO L226 Difference]: Without dead ends: 949 [2022-03-01 17:45:54,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:54,527 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:54,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-03-01 17:45:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2022-03-01 17:45:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2022-03-01 17:45:54,543 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2022-03-01 17:45:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:54,543 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2022-03-01 17:45:54,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2022-03-01 17:45:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:54,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:54,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-01 17:45:54,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1487153047, now seen corresponding path program 4 times [2022-03-01 17:45:54,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:54,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361574242] [2022-03-01 17:45:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:54,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361574242] [2022-03-01 17:45:54,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361574242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:54,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:54,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:54,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068690964] [2022-03-01 17:45:54,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:54,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:54,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:54,786 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:54,897 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2022-03-01 17:45:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:45:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:54,901 INFO L225 Difference]: With dead ends: 847 [2022-03-01 17:45:54,901 INFO L226 Difference]: Without dead ends: 827 [2022-03-01 17:45:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:54,903 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:54,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 65 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-03-01 17:45:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2022-03-01 17:45:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2022-03-01 17:45:54,916 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2022-03-01 17:45:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:54,916 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2022-03-01 17:45:54,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2022-03-01 17:45:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:54,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:54,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:54,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 17:45:54,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1597481612, now seen corresponding path program 3 times [2022-03-01 17:45:54,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:54,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411796402] [2022-03-01 17:45:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:54,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:54,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:54,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411796402] [2022-03-01 17:45:54,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411796402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:54,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146335657] [2022-03-01 17:45:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:45:54,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:54,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:54,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:45:55,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:45:55,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:45:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146335657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:55,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:55,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:45:55,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314596554] [2022-03-01 17:45:55,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:55,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:45:55,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:55,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:45:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:45:55,124 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:55,225 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2022-03-01 17:45:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:55,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:55,229 INFO L225 Difference]: With dead ends: 857 [2022-03-01 17:45:55,229 INFO L226 Difference]: Without dead ends: 857 [2022-03-01 17:45:55,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:55,230 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:55,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 66 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-01 17:45:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2022-03-01 17:45:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2022-03-01 17:45:55,243 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2022-03-01 17:45:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:55,245 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2022-03-01 17:45:55,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2022-03-01 17:45:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:55,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:55,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:55,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:55,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:55,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1932653139, now seen corresponding path program 5 times [2022-03-01 17:45:55,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:55,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35787965] [2022-03-01 17:45:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:55,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35787965] [2022-03-01 17:45:55,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35787965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:55,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:55,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:55,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367476930] [2022-03-01 17:45:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:55,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:55,494 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:55,609 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2022-03-01 17:45:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:45:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:55,613 INFO L225 Difference]: With dead ends: 866 [2022-03-01 17:45:55,613 INFO L226 Difference]: Without dead ends: 842 [2022-03-01 17:45:55,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:55,614 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 51 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-01 17:45:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2022-03-01 17:45:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2022-03-01 17:45:55,628 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2022-03-01 17:45:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:55,628 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2022-03-01 17:45:55,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2022-03-01 17:45:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:55,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:55,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:55,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:45:55,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash -189197302, now seen corresponding path program 4 times [2022-03-01 17:45:55,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:55,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041403291] [2022-03-01 17:45:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:55,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041403291] [2022-03-01 17:45:55,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041403291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:55,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114876826] [2022-03-01 17:45:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:45:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:55,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:55,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:45:55,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:45:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:45:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:55,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114876826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:55,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:55,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:45:55,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415120822] [2022-03-01 17:45:55,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:55,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:45:55,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:45:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:45:55,796 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:55,905 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2022-03-01 17:45:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:55,909 INFO L225 Difference]: With dead ends: 825 [2022-03-01 17:45:55,909 INFO L226 Difference]: Without dead ends: 757 [2022-03-01 17:45:55,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:55,910 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:55,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 56 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-01 17:45:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2022-03-01 17:45:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2022-03-01 17:45:55,922 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2022-03-01 17:45:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:55,922 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2022-03-01 17:45:55,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2022-03-01 17:45:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:55,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:55,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:55,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:56,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:56,140 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash 469196520, now seen corresponding path program 5 times [2022-03-01 17:45:56,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:56,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249165138] [2022-03-01 17:45:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:56,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249165138] [2022-03-01 17:45:56,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249165138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:56,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:56,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:56,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560213976] [2022-03-01 17:45:56,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:56,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:56,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:56,165 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:56,334 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2022-03-01 17:45:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:45:56,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:56,339 INFO L225 Difference]: With dead ends: 985 [2022-03-01 17:45:56,339 INFO L226 Difference]: Without dead ends: 946 [2022-03-01 17:45:56,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:45:56,339 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:56,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 76 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-01 17:45:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2022-03-01 17:45:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2022-03-01 17:45:56,352 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2022-03-01 17:45:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:56,352 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2022-03-01 17:45:56,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2022-03-01 17:45:56,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:56,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:56,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:56,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:45:56,354 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash 646376827, now seen corresponding path program 6 times [2022-03-01 17:45:56,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:56,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314752534] [2022-03-01 17:45:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:56,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314752534] [2022-03-01 17:45:56,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314752534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:56,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054261396] [2022-03-01 17:45:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:45:56,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:56,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:45:56,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:45:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:45:56,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:56,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054261396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:56,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:56,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:45:56,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480189972] [2022-03-01 17:45:56,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:56,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:45:56,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:45:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:45:56,507 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:56,615 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2022-03-01 17:45:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:56,618 INFO L225 Difference]: With dead ends: 783 [2022-03-01 17:45:56,618 INFO L226 Difference]: Without dead ends: 783 [2022-03-01 17:45:56,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:56,619 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:56,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 60 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-01 17:45:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2022-03-01 17:45:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2022-03-01 17:45:56,630 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2022-03-01 17:45:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:56,630 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2022-03-01 17:45:56,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2022-03-01 17:45:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:56,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:56,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:56,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:56,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:45:56,848 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -165524640, now seen corresponding path program 6 times [2022-03-01 17:45:56,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:56,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059047488] [2022-03-01 17:45:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:56,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059047488] [2022-03-01 17:45:56,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059047488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:45:56,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:45:56,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:45:56,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238905668] [2022-03-01 17:45:56,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:45:56,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:45:56,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:45:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:45:56,865 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:56,950 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2022-03-01 17:45:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:45:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:56,952 INFO L225 Difference]: With dead ends: 597 [2022-03-01 17:45:56,952 INFO L226 Difference]: Without dead ends: 565 [2022-03-01 17:45:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:56,953 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:56,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-01 17:45:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2022-03-01 17:45:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2022-03-01 17:45:56,962 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2022-03-01 17:45:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:56,962 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2022-03-01 17:45:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2022-03-01 17:45:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:45:56,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:56,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:56,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-01 17:45:56,975 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1904618539, now seen corresponding path program 7 times [2022-03-01 17:45:56,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:56,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950438589] [2022-03-01 17:45:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:56,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:56,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950438589] [2022-03-01 17:45:56,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950438589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:56,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064133769] [2022-03-01 17:45:56,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:45:56,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:56,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:56,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:45:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:45:57,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:57,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:57,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064133769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:57,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:57,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:45:57,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861961067] [2022-03-01 17:45:57,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:57,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:45:57,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:45:57,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:45:57,106 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:57,191 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2022-03-01 17:45:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:45:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:45:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:57,200 INFO L225 Difference]: With dead ends: 595 [2022-03-01 17:45:57,200 INFO L226 Difference]: Without dead ends: 595 [2022-03-01 17:45:57,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:45:57,200 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:57,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:45:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-01 17:45:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2022-03-01 17:45:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2022-03-01 17:45:57,211 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2022-03-01 17:45:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:57,211 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2022-03-01 17:45:57,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2022-03-01 17:45:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:45:57,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:57,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:57,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:57,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:45:57,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1226908174, now seen corresponding path program 1 times [2022-03-01 17:45:57,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:57,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058064250] [2022-03-01 17:45:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:57,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:57,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058064250] [2022-03-01 17:45:57,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058064250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:57,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793611694] [2022-03-01 17:45:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:57,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:57,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:57,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:45:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:57,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:45:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:45:57,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:45:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:57,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:45:57,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:45:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:45:57,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:45:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:58,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793611694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:58,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:58,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:45:58,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977749482] [2022-03-01 17:45:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:58,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:45:58,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:45:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:45:58,002 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:58,306 INFO L93 Difference]: Finished difference Result 899 states and 3342 transitions. [2022-03-01 17:45:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:45:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:45:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:58,309 INFO L225 Difference]: With dead ends: 899 [2022-03-01 17:45:58,309 INFO L226 Difference]: Without dead ends: 818 [2022-03-01 17:45:58,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:45:58,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:58,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 68 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 568 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-03-01 17:45:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-03-01 17:45:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 547. [2022-03-01 17:45:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.6336996336996337) internal successors, (1984), 546 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1984 transitions. [2022-03-01 17:45:58,321 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1984 transitions. Word has length 26 [2022-03-01 17:45:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:58,321 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 1984 transitions. [2022-03-01 17:45:58,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1984 transitions. [2022-03-01 17:45:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:45:58,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:58,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:58,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:58,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:58,532 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1338432237, now seen corresponding path program 1 times [2022-03-01 17:45:58,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:58,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304737785] [2022-03-01 17:45:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:58,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:58,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304737785] [2022-03-01 17:45:58,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304737785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:58,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163104278] [2022-03-01 17:45:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:58,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:58,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:45:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:45:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:45:58,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:45:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:58,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:45:59,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:45:59,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:45:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:45:59,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:45:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:59,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163104278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:45:59,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:45:59,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:45:59,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687752042] [2022-03-01 17:45:59,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:45:59,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:45:59,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:45:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:45:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:45:59,112 INFO L87 Difference]: Start difference. First operand 547 states and 1984 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:45:59,404 INFO L93 Difference]: Finished difference Result 975 states and 3622 transitions. [2022-03-01 17:45:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:45:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:45:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:45:59,407 INFO L225 Difference]: With dead ends: 975 [2022-03-01 17:45:59,407 INFO L226 Difference]: Without dead ends: 924 [2022-03-01 17:45:59,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:45:59,408 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:45:59,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 82 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 576 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-03-01 17:45:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-03-01 17:45:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 572. [2022-03-01 17:45:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.640980735551664) internal successors, (2079), 571 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 2079 transitions. [2022-03-01 17:45:59,418 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 2079 transitions. Word has length 26 [2022-03-01 17:45:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:45:59,419 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 2079 transitions. [2022-03-01 17:45:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:45:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 2079 transitions. [2022-03-01 17:45:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:45:59,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:45:59,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:45:59,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:45:59,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:45:59,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:45:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:45:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -833834161, now seen corresponding path program 2 times [2022-03-01 17:45:59,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:45:59,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15186212] [2022-03-01 17:45:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:45:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:45:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:45:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:45:59,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:45:59,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15186212] [2022-03-01 17:45:59,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15186212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:45:59,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825432169] [2022-03-01 17:45:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:45:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:45:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:45:59,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:45:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:45:59,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:45:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:45:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:45:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:45:59,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:45:59,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:46:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:00,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:00,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:00,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:00,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825432169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:00,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:00,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:46:00,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730023856] [2022-03-01 17:46:00,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:00,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:46:00,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:46:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:00,578 INFO L87 Difference]: Start difference. First operand 572 states and 2079 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:01,796 INFO L93 Difference]: Finished difference Result 2122 states and 7720 transitions. [2022-03-01 17:46:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:46:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:01,801 INFO L225 Difference]: With dead ends: 2122 [2022-03-01 17:46:01,801 INFO L226 Difference]: Without dead ends: 1864 [2022-03-01 17:46:01,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:46:01,802 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 385 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:01,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 166 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 993 Invalid, 0 Unknown, 953 Unchecked, 0.5s Time] [2022-03-01 17:46:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-03-01 17:46:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 671. [2022-03-01 17:46:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.698507462686567) internal successors, (2478), 670 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2478 transitions. [2022-03-01 17:46:01,818 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2478 transitions. Word has length 26 [2022-03-01 17:46:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:01,818 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2478 transitions. [2022-03-01 17:46:01,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2478 transitions. [2022-03-01 17:46:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:01,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:01,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:01,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:02,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:02,036 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1804833811, now seen corresponding path program 3 times [2022-03-01 17:46:02,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:02,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407681946] [2022-03-01 17:46:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:02,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:02,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407681946] [2022-03-01 17:46:02,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407681946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:02,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414329348] [2022-03-01 17:46:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:02,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:02,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:46:02,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:02,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:02,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:02,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:02,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:46:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:02,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:02,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:02,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414329348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:02,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:02,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:46:02,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120716220] [2022-03-01 17:46:02,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:02,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:46:02,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:46:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:02,852 INFO L87 Difference]: Start difference. First operand 671 states and 2478 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:04,346 INFO L93 Difference]: Finished difference Result 2342 states and 8644 transitions. [2022-03-01 17:46:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:46:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:04,351 INFO L225 Difference]: With dead ends: 2342 [2022-03-01 17:46:04,351 INFO L226 Difference]: Without dead ends: 2066 [2022-03-01 17:46:04,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:46:04,352 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 311 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:04,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 153 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1187 Invalid, 0 Unknown, 626 Unchecked, 0.5s Time] [2022-03-01 17:46:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-03-01 17:46:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 716. [2022-03-01 17:46:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.7552447552447554) internal successors, (2685), 715 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2685 transitions. [2022-03-01 17:46:04,370 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2685 transitions. Word has length 26 [2022-03-01 17:46:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:04,370 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2685 transitions. [2022-03-01 17:46:04,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2685 transitions. [2022-03-01 17:46:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:04,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:04,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:04,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:04,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:04,587 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -451524114, now seen corresponding path program 1 times [2022-03-01 17:46:04,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:04,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210234739] [2022-03-01 17:46:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:04,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:04,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210234739] [2022-03-01 17:46:04,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210234739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:04,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540911915] [2022-03-01 17:46:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:04,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:04,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:46:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:04,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:04,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:04,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:04,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:05,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:05,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:05,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:05,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540911915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:05,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:05,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:05,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497833570] [2022-03-01 17:46:05,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:05,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:05,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:05,072 INFO L87 Difference]: Start difference. First operand 716 states and 2685 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:05,338 INFO L93 Difference]: Finished difference Result 1178 states and 4447 transitions. [2022-03-01 17:46:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:05,341 INFO L225 Difference]: With dead ends: 1178 [2022-03-01 17:46:05,341 INFO L226 Difference]: Without dead ends: 1102 [2022-03-01 17:46:05,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:05,341 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:05,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 95 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 691 Invalid, 0 Unknown, 357 Unchecked, 0.2s Time] [2022-03-01 17:46:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-01 17:46:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 671. [2022-03-01 17:46:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.7313432835820897) internal successors, (2500), 670 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2500 transitions. [2022-03-01 17:46:05,367 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2500 transitions. Word has length 26 [2022-03-01 17:46:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:05,368 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2500 transitions. [2022-03-01 17:46:05,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2500 transitions. [2022-03-01 17:46:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:05,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:05,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:05,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 17:46:05,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-01 17:46:05,586 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash -568580688, now seen corresponding path program 2 times [2022-03-01 17:46:05,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:05,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052401487] [2022-03-01 17:46:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:05,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:05,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052401487] [2022-03-01 17:46:05,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052401487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:05,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954087187] [2022-03-01 17:46:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:05,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:05,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:05,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:46:05,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:05,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:05,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:05,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:06,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:06,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:06,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954087187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:06,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:06,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:46:06,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900619228] [2022-03-01 17:46:06,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:06,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:46:06,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:46:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:06,399 INFO L87 Difference]: Start difference. First operand 671 states and 2500 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:07,861 INFO L93 Difference]: Finished difference Result 1687 states and 6316 transitions. [2022-03-01 17:46:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:46:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:07,865 INFO L225 Difference]: With dead ends: 1687 [2022-03-01 17:46:07,866 INFO L226 Difference]: Without dead ends: 1630 [2022-03-01 17:46:07,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:46:07,867 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:07,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 133 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1228 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2022-03-01 17:46:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-03-01 17:46:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 703. [2022-03-01 17:46:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.735042735042735) internal successors, (2622), 702 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2622 transitions. [2022-03-01 17:46:07,882 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2622 transitions. Word has length 26 [2022-03-01 17:46:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2622 transitions. [2022-03-01 17:46:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2622 transitions. [2022-03-01 17:46:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:07,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:07,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:07,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:08,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-01 17:46:08,100 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1752012146, now seen corresponding path program 3 times [2022-03-01 17:46:08,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:08,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902420666] [2022-03-01 17:46:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:08,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902420666] [2022-03-01 17:46:08,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902420666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101673133] [2022-03-01 17:46:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:08,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:08,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:08,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:46:08,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:46:08,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:08,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:08,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:08,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:08,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:08,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101673133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:08,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:08,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:46:08,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986826127] [2022-03-01 17:46:08,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:08,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:46:08,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:46:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:08,850 INFO L87 Difference]: Start difference. First operand 703 states and 2622 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:10,344 INFO L93 Difference]: Finished difference Result 1738 states and 6437 transitions. [2022-03-01 17:46:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:46:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:10,348 INFO L225 Difference]: With dead ends: 1738 [2022-03-01 17:46:10,348 INFO L226 Difference]: Without dead ends: 1604 [2022-03-01 17:46:10,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:46:10,350 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 348 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:10,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 134 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1329 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-03-01 17:46:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-03-01 17:46:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 731. [2022-03-01 17:46:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.7739726027397262) internal successors, (2755), 730 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2755 transitions. [2022-03-01 17:46:10,370 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2755 transitions. Word has length 26 [2022-03-01 17:46:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:10,370 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2755 transitions. [2022-03-01 17:46:10,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2755 transitions. [2022-03-01 17:46:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:10,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:10,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:10,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:10,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 17:46:10,588 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 224799535, now seen corresponding path program 4 times [2022-03-01 17:46:10,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:10,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746628997] [2022-03-01 17:46:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:10,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:10,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746628997] [2022-03-01 17:46:10,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746628997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:10,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751896870] [2022-03-01 17:46:10,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:10,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:10,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:46:10,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:10,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:10,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:11,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:11,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:11,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:11,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:11,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751896870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:11,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:11,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:11,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492731580] [2022-03-01 17:46:11,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:11,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:11,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:11,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:11,040 INFO L87 Difference]: Start difference. First operand 731 states and 2755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:11,225 INFO L93 Difference]: Finished difference Result 1183 states and 4481 transitions. [2022-03-01 17:46:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:11,228 INFO L225 Difference]: With dead ends: 1183 [2022-03-01 17:46:11,228 INFO L226 Difference]: Without dead ends: 1101 [2022-03-01 17:46:11,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:11,230 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:11,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 51 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 507 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-01 17:46:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-03-01 17:46:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 762. [2022-03-01 17:46:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.776609724047306) internal successors, (2874), 761 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2874 transitions. [2022-03-01 17:46:11,243 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2874 transitions. Word has length 26 [2022-03-01 17:46:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:11,243 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2874 transitions. [2022-03-01 17:46:11,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2874 transitions. [2022-03-01 17:46:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:11,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:11,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:11,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:11,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:11,463 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1705152987, now seen corresponding path program 5 times [2022-03-01 17:46:11,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:11,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935588006] [2022-03-01 17:46:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:11,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:11,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935588006] [2022-03-01 17:46:11,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935588006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:11,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231565892] [2022-03-01 17:46:11,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:11,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:11,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:11,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:46:11,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:11,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:11,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:11,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:11,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:11,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:11,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:11,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231565892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:11,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:11,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:11,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890316481] [2022-03-01 17:46:11,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:11,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:11,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:11,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:11,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:11,911 INFO L87 Difference]: Start difference. First operand 762 states and 2874 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:12,191 INFO L93 Difference]: Finished difference Result 1201 states and 4552 transitions. [2022-03-01 17:46:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:12,194 INFO L225 Difference]: With dead ends: 1201 [2022-03-01 17:46:12,194 INFO L226 Difference]: Without dead ends: 1119 [2022-03-01 17:46:12,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:12,195 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:12,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 65 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 609 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-01 17:46:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-01 17:46:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 761. [2022-03-01 17:46:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.7776315789473682) internal successors, (2871), 760 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2871 transitions. [2022-03-01 17:46:12,208 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2871 transitions. Word has length 26 [2022-03-01 17:46:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:12,208 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2871 transitions. [2022-03-01 17:46:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2871 transitions. [2022-03-01 17:46:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:12,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:12,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:12,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 17:46:12,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:12,423 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1242967396, now seen corresponding path program 4 times [2022-03-01 17:46:12,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:12,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216890438] [2022-03-01 17:46:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:12,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:12,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216890438] [2022-03-01 17:46:12,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216890438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:12,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720209852] [2022-03-01 17:46:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:12,518 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:46:12,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:12,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:12,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:12,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:12,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:12,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:12,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:12,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720209852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:12,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:12,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:12,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013912559] [2022-03-01 17:46:12,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:12,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:12,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:12,869 INFO L87 Difference]: Start difference. First operand 761 states and 2871 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:13,169 INFO L93 Difference]: Finished difference Result 1147 states and 4334 transitions. [2022-03-01 17:46:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:13,172 INFO L225 Difference]: With dead ends: 1147 [2022-03-01 17:46:13,172 INFO L226 Difference]: Without dead ends: 1080 [2022-03-01 17:46:13,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:13,172 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:13,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 61 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 629 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-03-01 17:46:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-03-01 17:46:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 746. [2022-03-01 17:46:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.7731543624161072) internal successors, (2811), 745 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2811 transitions. [2022-03-01 17:46:13,187 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2811 transitions. Word has length 26 [2022-03-01 17:46:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:13,187 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2811 transitions. [2022-03-01 17:46:13,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2811 transitions. [2022-03-01 17:46:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:13,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:13,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:13,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:13,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 17:46:13,424 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1083669434, now seen corresponding path program 5 times [2022-03-01 17:46:13,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:13,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107298924] [2022-03-01 17:46:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:13,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:13,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:13,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107298924] [2022-03-01 17:46:13,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107298924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:13,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732078726] [2022-03-01 17:46:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:13,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:13,514 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:13,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:46:13,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:46:13,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:13,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:13,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:13,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:13,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:13,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:13,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:13,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732078726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:13,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:13,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:13,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867413172] [2022-03-01 17:46:13,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:13,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:13,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:13,804 INFO L87 Difference]: Start difference. First operand 746 states and 2811 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:13,996 INFO L93 Difference]: Finished difference Result 1149 states and 4350 transitions. [2022-03-01 17:46:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:13,998 INFO L225 Difference]: With dead ends: 1149 [2022-03-01 17:46:13,998 INFO L226 Difference]: Without dead ends: 1070 [2022-03-01 17:46:13,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:13,999 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:13,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 60 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 632 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-01 17:46:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-01 17:46:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 728. [2022-03-01 17:46:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.7427785419532325) internal successors, (2721), 727 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2721 transitions. [2022-03-01 17:46:14,011 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2721 transitions. Word has length 26 [2022-03-01 17:46:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:14,011 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2721 transitions. [2022-03-01 17:46:14,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2721 transitions. [2022-03-01 17:46:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:14,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:14,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:14,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-01 17:46:14,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:46:14,222 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:14,223 INFO L85 PathProgramCache]: Analyzing trace with hash 194382122, now seen corresponding path program 1 times [2022-03-01 17:46:14,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:14,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636671163] [2022-03-01 17:46:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:14,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:14,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636671163] [2022-03-01 17:46:14,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636671163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:14,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709485486] [2022-03-01 17:46:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:14,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:14,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:46:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:14,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:14,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:14,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:14,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:14,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:14,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:14,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:14,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709485486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:14,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:14,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:14,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142184993] [2022-03-01 17:46:14,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:14,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:14,680 INFO L87 Difference]: Start difference. First operand 728 states and 2721 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:14,925 INFO L93 Difference]: Finished difference Result 1017 states and 3824 transitions. [2022-03-01 17:46:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:14,927 INFO L225 Difference]: With dead ends: 1017 [2022-03-01 17:46:14,927 INFO L226 Difference]: Without dead ends: 1014 [2022-03-01 17:46:14,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:14,928 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:14,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 75 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 650 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-01 17:46:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-03-01 17:46:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 775. [2022-03-01 17:46:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7583979328165373) internal successors, (2909), 774 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2909 transitions. [2022-03-01 17:46:14,944 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2909 transitions. Word has length 26 [2022-03-01 17:46:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:14,944 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2909 transitions. [2022-03-01 17:46:14,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2909 transitions. [2022-03-01 17:46:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:14,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:14,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:14,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 17:46:15,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 17:46:15,160 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 195305643, now seen corresponding path program 1 times [2022-03-01 17:46:15,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:15,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987083418] [2022-03-01 17:46:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:15,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:15,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987083418] [2022-03-01 17:46:15,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987083418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:15,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495369614] [2022-03-01 17:46:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:15,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:15,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:15,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:46:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:15,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:15,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:15,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:15,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:15,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:15,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495369614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:15,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:15,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:15,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910485568] [2022-03-01 17:46:15,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:15,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:15,562 INFO L87 Difference]: Start difference. First operand 775 states and 2909 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:15,979 INFO L93 Difference]: Finished difference Result 1118 states and 4228 transitions. [2022-03-01 17:46:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:46:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:15,981 INFO L225 Difference]: With dead ends: 1118 [2022-03-01 17:46:15,981 INFO L226 Difference]: Without dead ends: 1043 [2022-03-01 17:46:15,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:15,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:15,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 890 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-01 17:46:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-01 17:46:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 755. [2022-03-01 17:46:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.7519893899204244) internal successors, (2829), 754 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2829 transitions. [2022-03-01 17:46:15,996 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2829 transitions. Word has length 26 [2022-03-01 17:46:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:15,996 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2829 transitions. [2022-03-01 17:46:15,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2829 transitions. [2022-03-01 17:46:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:15,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:15,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:16,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-01 17:46:16,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:46:16,214 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2101425572, now seen corresponding path program 2 times [2022-03-01 17:46:16,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:16,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240116763] [2022-03-01 17:46:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:16,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:16,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240116763] [2022-03-01 17:46:16,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240116763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:16,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868016112] [2022-03-01 17:46:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:16,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:16,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:16,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:46:16,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:46:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:16,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:16,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:16,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:16,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:16,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:16,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868016112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:16,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:16,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-03-01 17:46:16,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791068197] [2022-03-01 17:46:16,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:16,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:46:16,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:46:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:16,904 INFO L87 Difference]: Start difference. First operand 755 states and 2829 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:17,834 INFO L93 Difference]: Finished difference Result 1427 states and 5420 transitions. [2022-03-01 17:46:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:46:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:17,837 INFO L225 Difference]: With dead ends: 1427 [2022-03-01 17:46:17,837 INFO L226 Difference]: Without dead ends: 1352 [2022-03-01 17:46:17,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:46:17,838 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:17,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 80 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:46:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-03-01 17:46:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 751. [2022-03-01 17:46:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.7506666666666666) internal successors, (2813), 750 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2813 transitions. [2022-03-01 17:46:17,861 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2813 transitions. Word has length 26 [2022-03-01 17:46:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:17,861 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2813 transitions. [2022-03-01 17:46:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2813 transitions. [2022-03-01 17:46:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:17,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:17,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:17,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:18,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:18,079 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1304045621, now seen corresponding path program 1 times [2022-03-01 17:46:18,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:18,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379449528] [2022-03-01 17:46:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:18,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:18,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379449528] [2022-03-01 17:46:18,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379449528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:18,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615044160] [2022-03-01 17:46:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:18,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:18,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:18,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:46:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:18,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:18,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:18,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:18,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:18,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:18,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615044160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:18,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:18,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:18,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785415207] [2022-03-01 17:46:18,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:18,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:18,515 INFO L87 Difference]: Start difference. First operand 751 states and 2813 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:19,012 INFO L93 Difference]: Finished difference Result 1258 states and 4804 transitions. [2022-03-01 17:46:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:46:19,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:19,015 INFO L225 Difference]: With dead ends: 1258 [2022-03-01 17:46:19,015 INFO L226 Difference]: Without dead ends: 1158 [2022-03-01 17:46:19,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:19,016 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:19,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 66 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 829 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-03-01 17:46:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-01 17:46:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 771. [2022-03-01 17:46:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.787012987012987) internal successors, (2916), 770 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2916 transitions. [2022-03-01 17:46:19,031 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2916 transitions. Word has length 26 [2022-03-01 17:46:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:19,031 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2916 transitions. [2022-03-01 17:46:19,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2916 transitions. [2022-03-01 17:46:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:19,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:19,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:19,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:19,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:19,248 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash -895717173, now seen corresponding path program 2 times [2022-03-01 17:46:19,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:19,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996677468] [2022-03-01 17:46:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:46:19,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:19,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996677468] [2022-03-01 17:46:19,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996677468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:19,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653917220] [2022-03-01 17:46:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:19,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:19,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:19,397 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:46:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:46:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:19,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:19,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:19,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:19,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:19,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:46:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:20,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653917220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:20,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:20,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:46:20,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935002422] [2022-03-01 17:46:20,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:20,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:46:20,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:46:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:46:20,033 INFO L87 Difference]: Start difference. First operand 771 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:24,037 INFO L93 Difference]: Finished difference Result 5151 states and 18340 transitions. [2022-03-01 17:46:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 17:46:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:24,046 INFO L225 Difference]: With dead ends: 5151 [2022-03-01 17:46:24,046 INFO L226 Difference]: Without dead ends: 4243 [2022-03-01 17:46:24,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3264 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1731, Invalid=7389, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 17:46:24,048 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1103 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 4194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:24,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 312 Invalid, 4194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2991 Invalid, 0 Unknown, 798 Unchecked, 1.2s Time] [2022-03-01 17:46:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2022-03-01 17:46:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 1015. [2022-03-01 17:46:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.888560157790927) internal successors, (3943), 1014 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3943 transitions. [2022-03-01 17:46:24,095 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3943 transitions. Word has length 26 [2022-03-01 17:46:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 3943 transitions. [2022-03-01 17:46:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3943 transitions. [2022-03-01 17:46:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:24,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:24,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:24,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:24,306 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1739868142, now seen corresponding path program 3 times [2022-03-01 17:46:24,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:24,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700186083] [2022-03-01 17:46:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:24,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:24,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700186083] [2022-03-01 17:46:24,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700186083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:24,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574812410] [2022-03-01 17:46:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:24,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:24,398 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:24,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:46:24,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:46:24,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:46:24,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:24,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:24,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:24,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:24,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:24,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:46:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:24,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574812410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:24,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:24,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:46:24,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20108446] [2022-03-01 17:46:24,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:24,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:46:24,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:46:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:46:24,967 INFO L87 Difference]: Start difference. First operand 1015 states and 3943 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:27,564 INFO L93 Difference]: Finished difference Result 3237 states and 11702 transitions. [2022-03-01 17:46:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 17:46:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:27,570 INFO L225 Difference]: With dead ends: 3237 [2022-03-01 17:46:27,570 INFO L226 Difference]: Without dead ends: 2886 [2022-03-01 17:46:27,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1184, Invalid=4978, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:46:27,572 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 999 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:27,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 249 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2389 Invalid, 0 Unknown, 659 Unchecked, 0.8s Time] [2022-03-01 17:46:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-03-01 17:46:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1078. [2022-03-01 17:46:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.89322191272052) internal successors, (4193), 1077 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4193 transitions. [2022-03-01 17:46:27,626 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4193 transitions. Word has length 26 [2022-03-01 17:46:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:27,626 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 4193 transitions. [2022-03-01 17:46:27,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4193 transitions. [2022-03-01 17:46:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:27,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:27,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:27,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:27,858 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 163427787, now seen corresponding path program 3 times [2022-03-01 17:46:27,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:27,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486461999] [2022-03-01 17:46:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:27,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:27,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486461999] [2022-03-01 17:46:27,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486461999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:27,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140857182] [2022-03-01 17:46:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:27,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:27,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:27,923 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:27,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:46:27,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:46:27,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:28,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:28,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:46:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:28,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:28,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:28,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:46:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140857182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:28,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:28,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:46:28,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874093733] [2022-03-01 17:46:28,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:28,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:46:28,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:46:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:46:28,477 INFO L87 Difference]: Start difference. First operand 1078 states and 4193 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:30,266 INFO L93 Difference]: Finished difference Result 2573 states and 9605 transitions. [2022-03-01 17:46:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:46:30,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:30,272 INFO L225 Difference]: With dead ends: 2573 [2022-03-01 17:46:30,272 INFO L226 Difference]: Without dead ends: 2367 [2022-03-01 17:46:30,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=620, Invalid=2920, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:46:30,273 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 565 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1094 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:30,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 174 Invalid, 3210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1960 Invalid, 0 Unknown, 1094 Unchecked, 0.7s Time] [2022-03-01 17:46:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-03-01 17:46:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1104. [2022-03-01 17:46:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.8812330009066183) internal successors, (4281), 1103 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4281 transitions. [2022-03-01 17:46:30,294 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4281 transitions. Word has length 26 [2022-03-01 17:46:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:30,294 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4281 transitions. [2022-03-01 17:46:30,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4281 transitions. [2022-03-01 17:46:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:30,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:30,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:30,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 17:46:30,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:30,512 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -129975220, now seen corresponding path program 1 times [2022-03-01 17:46:30,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:30,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900454810] [2022-03-01 17:46:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:30,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:30,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900454810] [2022-03-01 17:46:30,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900454810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:30,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322776179] [2022-03-01 17:46:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:30,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:30,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:30,619 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:46:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:30,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:30,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:30,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:30,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:30,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:30,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:31,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322776179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:31,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:31,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:46:31,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800203447] [2022-03-01 17:46:31,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:31,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:31,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:31,015 INFO L87 Difference]: Start difference. First operand 1104 states and 4281 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:31,242 INFO L93 Difference]: Finished difference Result 1445 states and 5542 transitions. [2022-03-01 17:46:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:31,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:31,244 INFO L225 Difference]: With dead ends: 1445 [2022-03-01 17:46:31,244 INFO L226 Difference]: Without dead ends: 1424 [2022-03-01 17:46:31,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:31,245 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:31,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 59 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-01 17:46:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-03-01 17:46:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1083. [2022-03-01 17:46:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.8964879852125693) internal successors, (4216), 1082 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 4216 transitions. [2022-03-01 17:46:31,273 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 4216 transitions. Word has length 26 [2022-03-01 17:46:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:31,274 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 4216 transitions. [2022-03-01 17:46:31,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 4216 transitions. [2022-03-01 17:46:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:31,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:31,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:31,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:31,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 17:46:31,492 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 237772382, now seen corresponding path program 6 times [2022-03-01 17:46:31,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:31,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480128506] [2022-03-01 17:46:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:31,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:31,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480128506] [2022-03-01 17:46:31,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480128506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:31,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725620405] [2022-03-01 17:46:31,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:31,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:31,570 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:31,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:46:31,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:46:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:31,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:31,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:46:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:31,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:32,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:32,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:32,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725620405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:32,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:32,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:46:32,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303914980] [2022-03-01 17:46:32,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:32,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:46:32,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:46:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:32,134 INFO L87 Difference]: Start difference. First operand 1083 states and 4216 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:33,134 INFO L93 Difference]: Finished difference Result 1971 states and 7502 transitions. [2022-03-01 17:46:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:46:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:33,138 INFO L225 Difference]: With dead ends: 1971 [2022-03-01 17:46:33,138 INFO L226 Difference]: Without dead ends: 1760 [2022-03-01 17:46:33,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:46:33,139 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 484 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:33,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 90 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1020 Invalid, 0 Unknown, 341 Unchecked, 0.4s Time] [2022-03-01 17:46:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-01 17:46:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1122. [2022-03-01 17:46:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8858162355040142) internal successors, (4356), 1121 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4356 transitions. [2022-03-01 17:46:33,157 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4356 transitions. Word has length 26 [2022-03-01 17:46:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:33,157 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 4356 transitions. [2022-03-01 17:46:33,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4356 transitions. [2022-03-01 17:46:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:33,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:33,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:33,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:46:33,375 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 422766040, now seen corresponding path program 4 times [2022-03-01 17:46:33,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:33,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884322570] [2022-03-01 17:46:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:33,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:33,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884322570] [2022-03-01 17:46:33,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884322570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320115192] [2022-03-01 17:46:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:33,508 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:33,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:46:33,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:33,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 17:46:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:33,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:33,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:33,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:33,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:33,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320115192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:33,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:33,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:46:33,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035752593] [2022-03-01 17:46:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:33,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:33,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:33,855 INFO L87 Difference]: Start difference. First operand 1122 states and 4356 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:34,214 INFO L93 Difference]: Finished difference Result 1473 states and 5695 transitions. [2022-03-01 17:46:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:34,217 INFO L225 Difference]: With dead ends: 1473 [2022-03-01 17:46:34,217 INFO L226 Difference]: Without dead ends: 1400 [2022-03-01 17:46:34,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:34,218 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:34,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 68 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:46:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-01 17:46:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1122. [2022-03-01 17:46:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8858162355040142) internal successors, (4356), 1121 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4356 transitions. [2022-03-01 17:46:34,234 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4356 transitions. Word has length 26 [2022-03-01 17:46:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:34,234 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 4356 transitions. [2022-03-01 17:46:34,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4356 transitions. [2022-03-01 17:46:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:34,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:34,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:34,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:34,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:46:34,452 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1280716796, now seen corresponding path program 7 times [2022-03-01 17:46:34,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:34,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126101340] [2022-03-01 17:46:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:34,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:34,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:34,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126101340] [2022-03-01 17:46:34,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126101340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:34,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917877288] [2022-03-01 17:46:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:46:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:34,564 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:34,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:46:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:34,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:34,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:34,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:34,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:34,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917877288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:34,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:34,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:34,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419381982] [2022-03-01 17:46:34,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:34,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:34,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:34,855 INFO L87 Difference]: Start difference. First operand 1122 states and 4356 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:35,237 INFO L93 Difference]: Finished difference Result 1505 states and 5807 transitions. [2022-03-01 17:46:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:35,240 INFO L225 Difference]: With dead ends: 1505 [2022-03-01 17:46:35,240 INFO L226 Difference]: Without dead ends: 1432 [2022-03-01 17:46:35,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:35,243 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:35,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 73 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:46:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-03-01 17:46:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1129. [2022-03-01 17:46:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.8847517730496453) internal successors, (4382), 1128 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 4382 transitions. [2022-03-01 17:46:35,260 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 4382 transitions. Word has length 26 [2022-03-01 17:46:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:35,260 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 4382 transitions. [2022-03-01 17:46:35,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 4382 transitions. [2022-03-01 17:46:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:35,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:35,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:35,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-01 17:46:35,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:35,477 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:35,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1045920034, now seen corresponding path program 8 times [2022-03-01 17:46:35,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:35,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445678295] [2022-03-01 17:46:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:35,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:35,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445678295] [2022-03-01 17:46:35,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445678295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:35,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594255101] [2022-03-01 17:46:35,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:35,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:35,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:35,563 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:35,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:46:35,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:35,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:35,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:35,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:35,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:35,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:35,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:36,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594255101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:36,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:36,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:46:36,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976543291] [2022-03-01 17:46:36,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:36,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:46:36,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:46:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:36,049 INFO L87 Difference]: Start difference. First operand 1129 states and 4382 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:37,611 INFO L93 Difference]: Finished difference Result 2053 states and 7840 transitions. [2022-03-01 17:46:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:46:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:37,615 INFO L225 Difference]: With dead ends: 2053 [2022-03-01 17:46:37,615 INFO L226 Difference]: Without dead ends: 1863 [2022-03-01 17:46:37,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:46:37,616 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 420 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:37,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 119 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1553 Invalid, 0 Unknown, 407 Unchecked, 0.7s Time] [2022-03-01 17:46:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-03-01 17:46:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1137. [2022-03-01 17:46:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.8882042253521125) internal successors, (4417), 1136 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 4417 transitions. [2022-03-01 17:46:37,633 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 4417 transitions. Word has length 26 [2022-03-01 17:46:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:37,633 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 4417 transitions. [2022-03-01 17:46:37,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 4417 transitions. [2022-03-01 17:46:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:37,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:37,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:37,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 17:46:37,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:46:37,840 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:37,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1134269976, now seen corresponding path program 5 times [2022-03-01 17:46:37,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:37,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802811406] [2022-03-01 17:46:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:37,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:37,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802811406] [2022-03-01 17:46:37,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802811406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:37,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199658908] [2022-03-01 17:46:37,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:37,914 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:37,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:46:37,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:37,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:38,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:38,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:38,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:38,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:38,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:38,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:38,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:38,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199658908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:38,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:38,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:38,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844367280] [2022-03-01 17:46:38,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:38,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:38,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:38,235 INFO L87 Difference]: Start difference. First operand 1137 states and 4417 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:38,606 INFO L93 Difference]: Finished difference Result 1474 states and 5704 transitions. [2022-03-01 17:46:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:38,609 INFO L225 Difference]: With dead ends: 1474 [2022-03-01 17:46:38,609 INFO L226 Difference]: Without dead ends: 1401 [2022-03-01 17:46:38,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:38,610 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:38,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 67 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:46:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-03-01 17:46:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1146. [2022-03-01 17:46:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.890829694323144) internal successors, (4455), 1145 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 4455 transitions. [2022-03-01 17:46:38,626 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 4455 transitions. Word has length 26 [2022-03-01 17:46:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:38,626 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 4455 transitions. [2022-03-01 17:46:38,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 4455 transitions. [2022-03-01 17:46:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:38,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:38,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:38,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:38,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:46:38,829 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash -385639184, now seen corresponding path program 6 times [2022-03-01 17:46:38,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:38,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659832987] [2022-03-01 17:46:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:38,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:38,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:38,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659832987] [2022-03-01 17:46:38,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659832987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:38,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342325813] [2022-03-01 17:46:38,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:38,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:38,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:38,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:46:39,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:46:39,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:39,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:39,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:39,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:39,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:39,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:39,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342325813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:39,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:39,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:46:39,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062238794] [2022-03-01 17:46:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:39,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:46:39,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:46:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:39,593 INFO L87 Difference]: Start difference. First operand 1146 states and 4455 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:41,082 INFO L93 Difference]: Finished difference Result 1988 states and 7612 transitions. [2022-03-01 17:46:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:46:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:41,087 INFO L225 Difference]: With dead ends: 1988 [2022-03-01 17:46:41,087 INFO L226 Difference]: Without dead ends: 1808 [2022-03-01 17:46:41,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=470, Invalid=1786, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:46:41,088 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 446 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:41,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 106 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1442 Invalid, 0 Unknown, 266 Unchecked, 0.6s Time] [2022-03-01 17:46:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-03-01 17:46:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1148. [2022-03-01 17:46:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.891020052310375) internal successors, (4463), 1147 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4463 transitions. [2022-03-01 17:46:41,107 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4463 transitions. Word has length 26 [2022-03-01 17:46:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:41,107 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 4463 transitions. [2022-03-01 17:46:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4463 transitions. [2022-03-01 17:46:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:41,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:41,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:41,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:46:41,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:41,325 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1828012003, now seen corresponding path program 6 times [2022-03-01 17:46:41,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:41,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153471694] [2022-03-01 17:46:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:41,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:41,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153471694] [2022-03-01 17:46:41,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153471694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:41,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604158463] [2022-03-01 17:46:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:41,411 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:41,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:46:41,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:46:41,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:41,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:41,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:41,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:41,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:42,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604158463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:42,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:42,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:46:42,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832459708] [2022-03-01 17:46:42,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:46:42,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:46:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:42,001 INFO L87 Difference]: Start difference. First operand 1148 states and 4463 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:43,742 INFO L93 Difference]: Finished difference Result 3662 states and 13707 transitions. [2022-03-01 17:46:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:46:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:43,749 INFO L225 Difference]: With dead ends: 3662 [2022-03-01 17:46:43,749 INFO L226 Difference]: Without dead ends: 3453 [2022-03-01 17:46:43,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=2096, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:46:43,750 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 505 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:43,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 191 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:46:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2022-03-01 17:46:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 1208. [2022-03-01 17:46:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.899751449875725) internal successors, (4707), 1207 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4707 transitions. [2022-03-01 17:46:43,775 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4707 transitions. Word has length 26 [2022-03-01 17:46:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:43,776 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 4707 transitions. [2022-03-01 17:46:43,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4707 transitions. [2022-03-01 17:46:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:43,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:43,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:43,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:46:43,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:43,993 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1643018345, now seen corresponding path program 4 times [2022-03-01 17:46:43,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:43,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288329980] [2022-03-01 17:46:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:44,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288329980] [2022-03-01 17:46:44,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288329980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:44,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252004958] [2022-03-01 17:46:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:44,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:44,068 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:46:44,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:44,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:44,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:44,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:44,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:44,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:44,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252004958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:44,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:44,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:46:44,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329133391] [2022-03-01 17:46:44,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:44,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:44,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:44,316 INFO L87 Difference]: Start difference. First operand 1208 states and 4707 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:44,816 INFO L93 Difference]: Finished difference Result 1603 states and 6218 transitions. [2022-03-01 17:46:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:44,819 INFO L225 Difference]: With dead ends: 1603 [2022-03-01 17:46:44,819 INFO L226 Difference]: Without dead ends: 1521 [2022-03-01 17:46:44,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:44,820 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:44,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 82 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:46:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-03-01 17:46:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1185. [2022-03-01 17:46:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.918918918918919) internal successors, (4640), 1184 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 4640 transitions. [2022-03-01 17:46:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 4640 transitions. Word has length 26 [2022-03-01 17:46:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:44,837 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 4640 transitions. [2022-03-01 17:46:44,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 4640 transitions. [2022-03-01 17:46:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:44,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:44,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:44,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 17:46:45,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 17:46:45,055 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1175566379, now seen corresponding path program 7 times [2022-03-01 17:46:45,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:45,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949110860] [2022-03-01 17:46:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949110860] [2022-03-01 17:46:45,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949110860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621193118] [2022-03-01 17:46:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:46:45,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:45,152 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:45,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:46:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:45,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:45,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:45,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:45,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621193118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:45,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:45,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:46:45,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470835556] [2022-03-01 17:46:45,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:45,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:45,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:45,495 INFO L87 Difference]: Start difference. First operand 1185 states and 4640 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:45,882 INFO L93 Difference]: Finished difference Result 1626 states and 6315 transitions. [2022-03-01 17:46:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:45,885 INFO L225 Difference]: With dead ends: 1626 [2022-03-01 17:46:45,885 INFO L226 Difference]: Without dead ends: 1544 [2022-03-01 17:46:45,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:45,886 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:45,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:46:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-03-01 17:46:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1188. [2022-03-01 17:46:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.91575400168492) internal successors, (4648), 1187 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 4648 transitions. [2022-03-01 17:46:45,903 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 4648 transitions. Word has length 26 [2022-03-01 17:46:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:45,903 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 4648 transitions. [2022-03-01 17:46:45,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 4648 transitions. [2022-03-01 17:46:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:45,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:45,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:45,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:46,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:46,121 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash -436912189, now seen corresponding path program 8 times [2022-03-01 17:46:46,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:46,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159444577] [2022-03-01 17:46:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:46,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:46,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159444577] [2022-03-01 17:46:46,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159444577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:46,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741028983] [2022-03-01 17:46:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:46,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:46,198 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:46,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:46:46,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:46:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:46,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:46,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:46,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:46,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741028983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:46,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:46,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-03-01 17:46:46,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418639890] [2022-03-01 17:46:46,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:46,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:46:46,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:46:46,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:46,733 INFO L87 Difference]: Start difference. First operand 1188 states and 4648 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:48,467 INFO L93 Difference]: Finished difference Result 2154 states and 8269 transitions. [2022-03-01 17:46:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:46:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:48,471 INFO L225 Difference]: With dead ends: 2154 [2022-03-01 17:46:48,471 INFO L226 Difference]: Without dead ends: 2072 [2022-03-01 17:46:48,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=522, Invalid=2130, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:46:48,472 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 514 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:48,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 126 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:46:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-03-01 17:46:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1193. [2022-03-01 17:46:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.921979865771812) internal successors, (4675), 1192 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 4675 transitions. [2022-03-01 17:46:48,492 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 4675 transitions. Word has length 26 [2022-03-01 17:46:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:48,492 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 4675 transitions. [2022-03-01 17:46:48,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 4675 transitions. [2022-03-01 17:46:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:48,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:48,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:48,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:48,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 17:46:48,709 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:48,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1294023441, now seen corresponding path program 5 times [2022-03-01 17:46:48,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:48,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218781252] [2022-03-01 17:46:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:48,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:48,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218781252] [2022-03-01 17:46:48,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218781252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:48,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5294249] [2022-03-01 17:46:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:48,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:48,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:48,820 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:48,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:46:48,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:46:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:48,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:49,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:49,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:49,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:46:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5294249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:49,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:49,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:49,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765414912] [2022-03-01 17:46:49,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:49,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:49,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:49,056 INFO L87 Difference]: Start difference. First operand 1193 states and 4675 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:49,407 INFO L93 Difference]: Finished difference Result 1715 states and 6702 transitions. [2022-03-01 17:46:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:46:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:49,410 INFO L225 Difference]: With dead ends: 1715 [2022-03-01 17:46:49,411 INFO L226 Difference]: Without dead ends: 1615 [2022-03-01 17:46:49,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:49,411 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:49,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 78 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:46:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-03-01 17:46:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1203. [2022-03-01 17:46:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.940099833610649) internal successors, (4736), 1202 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 4736 transitions. [2022-03-01 17:46:49,429 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 4736 transitions. Word has length 26 [2022-03-01 17:46:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:49,429 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 4736 transitions. [2022-03-01 17:46:49,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 4736 transitions. [2022-03-01 17:46:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:49,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:49,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:49,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:49,644 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 472005091, now seen corresponding path program 6 times [2022-03-01 17:46:49,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:49,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289031173] [2022-03-01 17:46:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:49,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289031173] [2022-03-01 17:46:49,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289031173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:49,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118690076] [2022-03-01 17:46:49,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:49,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:49,738 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:49,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:46:49,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:46:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:46:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:49,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:49,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:50,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:50,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:46:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118690076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:50,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:50,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:46:50,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245029698] [2022-03-01 17:46:50,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:50,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:46:50,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:46:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:50,287 INFO L87 Difference]: Start difference. First operand 1203 states and 4736 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:53,349 INFO L93 Difference]: Finished difference Result 5406 states and 19993 transitions. [2022-03-01 17:46:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 17:46:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:53,358 INFO L225 Difference]: With dead ends: 5406 [2022-03-01 17:46:53,359 INFO L226 Difference]: Without dead ends: 4667 [2022-03-01 17:46:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3541 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1585, Invalid=8117, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 17:46:53,361 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 923 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:53,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 269 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:46:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-03-01 17:46:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 1262. [2022-03-01 17:46:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.985725614591594) internal successors, (5026), 1261 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5026 transitions. [2022-03-01 17:46:53,395 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5026 transitions. Word has length 26 [2022-03-01 17:46:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:53,395 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5026 transitions. [2022-03-01 17:46:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5026 transitions. [2022-03-01 17:46:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:53,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:53,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:53,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:53,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:46:53,611 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1966484856, now seen corresponding path program 9 times [2022-03-01 17:46:53,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:53,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798689459] [2022-03-01 17:46:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:53,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:53,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798689459] [2022-03-01 17:46:53,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798689459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:53,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482173505] [2022-03-01 17:46:53,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:53,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:53,708 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:53,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:46:53,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:53,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:53,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:53,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:53,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:54,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:54,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:54,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482173505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:54,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:54,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:54,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135939929] [2022-03-01 17:46:54,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:54,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:54,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:54,083 INFO L87 Difference]: Start difference. First operand 1262 states and 5026 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:54,333 INFO L93 Difference]: Finished difference Result 1668 states and 6546 transitions. [2022-03-01 17:46:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:46:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:54,336 INFO L225 Difference]: With dead ends: 1668 [2022-03-01 17:46:54,336 INFO L226 Difference]: Without dead ends: 1661 [2022-03-01 17:46:54,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:54,337 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:54,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 106 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-03-01 17:46:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-01 17:46:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1340. [2022-03-01 17:46:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.9596713965646004) internal successors, (5302), 1339 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 5302 transitions. [2022-03-01 17:46:54,355 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 5302 transitions. Word has length 26 [2022-03-01 17:46:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:54,355 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 5302 transitions. [2022-03-01 17:46:54,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 5302 transitions. [2022-03-01 17:46:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:54,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:54,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:54,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:54,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 17:46:54,571 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1995114007, now seen corresponding path program 1 times [2022-03-01 17:46:54,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:54,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111580024] [2022-03-01 17:46:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:54,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:54,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111580024] [2022-03-01 17:46:54,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111580024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:54,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256349104] [2022-03-01 17:46:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:54,664 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:46:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:54,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:54,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:54,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:55,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:55,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:55,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256349104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:55,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:55,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:55,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126339784] [2022-03-01 17:46:55,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:55,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:55,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:55,052 INFO L87 Difference]: Start difference. First operand 1340 states and 5302 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:55,426 INFO L93 Difference]: Finished difference Result 1916 states and 7520 transitions. [2022-03-01 17:46:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:46:55,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:55,429 INFO L225 Difference]: With dead ends: 1916 [2022-03-01 17:46:55,429 INFO L226 Difference]: Without dead ends: 1809 [2022-03-01 17:46:55,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:55,430 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:55,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 97 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 862 Invalid, 0 Unknown, 276 Unchecked, 0.3s Time] [2022-03-01 17:46:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-03-01 17:46:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1304. [2022-03-01 17:46:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.9693016116653874) internal successors, (5172), 1303 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5172 transitions. [2022-03-01 17:46:55,448 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5172 transitions. Word has length 26 [2022-03-01 17:46:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:55,448 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 5172 transitions. [2022-03-01 17:46:55,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5172 transitions. [2022-03-01 17:46:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:55,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:55,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:55,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:55,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:46:55,667 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1854960793, now seen corresponding path program 9 times [2022-03-01 17:46:55,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:55,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877534199] [2022-03-01 17:46:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:55,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877534199] [2022-03-01 17:46:55,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877534199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:55,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905812406] [2022-03-01 17:46:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:55,768 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:55,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:46:55,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:56,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:56,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:56,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:56,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:56,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905812406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:56,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:56,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:56,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143499285] [2022-03-01 17:46:56,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:56,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:56,192 INFO L87 Difference]: Start difference. First operand 1304 states and 5172 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:56,502 INFO L93 Difference]: Finished difference Result 1912 states and 7506 transitions. [2022-03-01 17:46:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:46:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:56,506 INFO L225 Difference]: With dead ends: 1912 [2022-03-01 17:46:56,506 INFO L226 Difference]: Without dead ends: 1831 [2022-03-01 17:46:56,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:56,506 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:56,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 95 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 819 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2022-03-01 17:46:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-01 17:46:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1296. [2022-03-01 17:46:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.9791505791505792) internal successors, (5153), 1295 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5153 transitions. [2022-03-01 17:46:56,525 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5153 transitions. Word has length 26 [2022-03-01 17:46:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:56,526 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 5153 transitions. [2022-03-01 17:46:56,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5153 transitions. [2022-03-01 17:46:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:56,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:56,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:56,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:46:56,744 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2039399989, now seen corresponding path program 10 times [2022-03-01 17:46:56,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:56,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654781487] [2022-03-01 17:46:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:56,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654781487] [2022-03-01 17:46:56,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654781487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:56,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400474536] [2022-03-01 17:46:56,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:56,813 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:56,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:46:56,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:56,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:56,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:56,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:56,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:57,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:57,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:57,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:57,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400474536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:57,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:57,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:57,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094018857] [2022-03-01 17:46:57,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:57,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:57,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:57,091 INFO L87 Difference]: Start difference. First operand 1296 states and 5153 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:57,319 INFO L93 Difference]: Finished difference Result 2018 states and 7870 transitions. [2022-03-01 17:46:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:57,323 INFO L225 Difference]: With dead ends: 2018 [2022-03-01 17:46:57,323 INFO L226 Difference]: Without dead ends: 1930 [2022-03-01 17:46:57,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:46:57,324 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:57,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 115 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 674 Invalid, 0 Unknown, 382 Unchecked, 0.2s Time] [2022-03-01 17:46:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-03-01 17:46:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1308. [2022-03-01 17:46:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.9808722264728384) internal successors, (5203), 1307 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 5203 transitions. [2022-03-01 17:46:57,365 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 5203 transitions. Word has length 26 [2022-03-01 17:46:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:57,366 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 5203 transitions. [2022-03-01 17:46:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 5203 transitions. [2022-03-01 17:46:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:57,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:57,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:57,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:57,583 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1239474505, now seen corresponding path program 1 times [2022-03-01 17:46:57,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:57,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113639364] [2022-03-01 17:46:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:57,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:57,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113639364] [2022-03-01 17:46:57,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113639364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:57,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819263909] [2022-03-01 17:46:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:57,678 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:46:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:57,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:46:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:58,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:58,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:58,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:58,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819263909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:58,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:58,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:46:58,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863176890] [2022-03-01 17:46:58,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:58,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:58,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:58,045 INFO L87 Difference]: Start difference. First operand 1308 states and 5203 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:58,388 INFO L93 Difference]: Finished difference Result 1983 states and 7755 transitions. [2022-03-01 17:46:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:46:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:58,392 INFO L225 Difference]: With dead ends: 1983 [2022-03-01 17:46:58,392 INFO L226 Difference]: Without dead ends: 1942 [2022-03-01 17:46:58,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:58,392 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:58,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 93 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 816 Invalid, 0 Unknown, 269 Unchecked, 0.3s Time] [2022-03-01 17:46:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-03-01 17:46:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1276. [2022-03-01 17:46:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9819607843137255) internal successors, (5077), 1275 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 5077 transitions. [2022-03-01 17:46:58,440 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 5077 transitions. Word has length 26 [2022-03-01 17:46:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:58,440 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 5077 transitions. [2022-03-01 17:46:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 5077 transitions. [2022-03-01 17:46:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:58,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:58,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:58,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:58,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:58,647 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1670154954, now seen corresponding path program 10 times [2022-03-01 17:46:58,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:58,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800086970] [2022-03-01 17:46:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:58,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800086970] [2022-03-01 17:46:58,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800086970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:58,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931708448] [2022-03-01 17:46:58,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:58,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:58,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:58,765 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:58,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:46:58,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:58,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:58,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:59,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:59,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:46:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:46:59,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:46:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931708448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:59,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:59,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:46:59,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069638913] [2022-03-01 17:46:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:59,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:59,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:59,107 INFO L87 Difference]: Start difference. First operand 1276 states and 5077 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:59,451 INFO L93 Difference]: Finished difference Result 1809 states and 7105 transitions. [2022-03-01 17:46:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:46:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:59,455 INFO L225 Difference]: With dead ends: 1809 [2022-03-01 17:46:59,455 INFO L226 Difference]: Without dead ends: 1736 [2022-03-01 17:46:59,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:59,455 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:59,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 77 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-03-01 17:46:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-03-01 17:46:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1285. [2022-03-01 17:46:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9828660436137073) internal successors, (5114), 1284 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5114 transitions. [2022-03-01 17:46:59,474 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5114 transitions. Word has length 26 [2022-03-01 17:46:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 5114 transitions. [2022-03-01 17:46:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5114 transitions. [2022-03-01 17:46:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:46:59,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:59,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:59,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:59,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 17:46:59,678 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:46:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1441380884, now seen corresponding path program 11 times [2022-03-01 17:46:59,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:59,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862146263] [2022-03-01 17:46:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:59,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862146263] [2022-03-01 17:46:59,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862146263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:59,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323286099] [2022-03-01 17:46:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:59,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:59,772 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:59,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:46:59,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:46:59,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:59,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:46:59,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:00,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:00,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:00,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323286099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:00,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:00,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:47:00,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374541042] [2022-03-01 17:47:00,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:00,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:00,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:00,023 INFO L87 Difference]: Start difference. First operand 1285 states and 5114 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:00,463 INFO L93 Difference]: Finished difference Result 1821 states and 7185 transitions. [2022-03-01 17:47:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:47:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:00,467 INFO L225 Difference]: With dead ends: 1821 [2022-03-01 17:47:00,467 INFO L226 Difference]: Without dead ends: 1738 [2022-03-01 17:47:00,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:00,468 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:00,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 90 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1010 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-03-01 17:47:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-03-01 17:47:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1277. [2022-03-01 17:47:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.9827586206896552) internal successors, (5082), 1276 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 5082 transitions. [2022-03-01 17:47:00,495 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 5082 transitions. Word has length 26 [2022-03-01 17:47:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 5082 transitions. [2022-03-01 17:47:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 5082 transitions. [2022-03-01 17:47:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:00,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:00,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:00,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:00,711 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -876774731, now seen corresponding path program 11 times [2022-03-01 17:47:00,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:00,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149009434] [2022-03-01 17:47:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:00,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149009434] [2022-03-01 17:47:00,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149009434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:00,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44873122] [2022-03-01 17:47:00,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:00,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:00,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:00,784 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:00,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:47:00,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:00,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:01,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:01,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-03-01 17:47:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44873122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:01,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:01,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:01,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774312795] [2022-03-01 17:47:01,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:01,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:01,173 INFO L87 Difference]: Start difference. First operand 1277 states and 5082 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:02,577 INFO L93 Difference]: Finished difference Result 2727 states and 10219 transitions. [2022-03-01 17:47:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:47:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:02,582 INFO L225 Difference]: With dead ends: 2727 [2022-03-01 17:47:02,582 INFO L226 Difference]: Without dead ends: 2571 [2022-03-01 17:47:02,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:47:02,583 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 317 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:02,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 127 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1831 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-03-01 17:47:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-03-01 17:47:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1286. [2022-03-01 17:47:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.982101167315175) internal successors, (5117), 1285 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5117 transitions. [2022-03-01 17:47:02,606 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5117 transitions. Word has length 26 [2022-03-01 17:47:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:02,606 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 5117 transitions. [2022-03-01 17:47:02,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5117 transitions. [2022-03-01 17:47:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:02,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:02,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:02,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 17:47:02,824 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 603578721, now seen corresponding path program 12 times [2022-03-01 17:47:02,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:02,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366096878] [2022-03-01 17:47:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:02,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:02,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:02,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366096878] [2022-03-01 17:47:02,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366096878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:02,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585837940] [2022-03-01 17:47:02,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:02,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:02,899 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:02,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:47:02,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:47:02,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:02,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:02,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:03,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:03,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:03,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:03,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:03,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585837940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:03,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:03,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:47:03,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587422116] [2022-03-01 17:47:03,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:03,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:03,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:03,211 INFO L87 Difference]: Start difference. First operand 1286 states and 5117 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:03,589 INFO L93 Difference]: Finished difference Result 1811 states and 7115 transitions. [2022-03-01 17:47:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:47:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:03,593 INFO L225 Difference]: With dead ends: 1811 [2022-03-01 17:47:03,593 INFO L226 Difference]: Without dead ends: 1729 [2022-03-01 17:47:03,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:03,593 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:03,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 103 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 879 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2022-03-01 17:47:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-03-01 17:47:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1284. [2022-03-01 17:47:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.9820732657833204) internal successors, (5109), 1283 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 5109 transitions. [2022-03-01 17:47:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 5109 transitions. Word has length 26 [2022-03-01 17:47:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:03,612 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 5109 transitions. [2022-03-01 17:47:03,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 5109 transitions. [2022-03-01 17:47:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:03,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:03,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:03,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 17:47:03,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:03,827 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2089503184, now seen corresponding path program 12 times [2022-03-01 17:47:03,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:03,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268791665] [2022-03-01 17:47:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:03,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268791665] [2022-03-01 17:47:03,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268791665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:03,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090435733] [2022-03-01 17:47:03,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:03,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:03,912 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:03,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:47:03,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:47:03,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:04,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:04,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:04,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:04,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:04,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090435733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:04,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:04,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:04,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848919701] [2022-03-01 17:47:04,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:04,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:04,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:04,257 INFO L87 Difference]: Start difference. First operand 1284 states and 5109 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:04,729 INFO L93 Difference]: Finished difference Result 2584 states and 10021 transitions. [2022-03-01 17:47:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:47:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:04,735 INFO L225 Difference]: With dead ends: 2584 [2022-03-01 17:47:04,735 INFO L226 Difference]: Without dead ends: 2503 [2022-03-01 17:47:04,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:04,735 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 250 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:04,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 110 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1029 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-03-01 17:47:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-03-01 17:47:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1324. [2022-03-01 17:47:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9614512471655328) internal successors, (5241), 1323 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5241 transitions. [2022-03-01 17:47:04,773 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5241 transitions. Word has length 26 [2022-03-01 17:47:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:04,773 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5241 transitions. [2022-03-01 17:47:04,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5241 transitions. [2022-03-01 17:47:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:04,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:04,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:04,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:04,991 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1977979121, now seen corresponding path program 13 times [2022-03-01 17:47:04,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:04,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791681483] [2022-03-01 17:47:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:05,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:05,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791681483] [2022-03-01 17:47:05,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791681483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:05,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430053043] [2022-03-01 17:47:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:05,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:05,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:05,087 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:05,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:47:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:05,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:05,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:05,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:05,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:05,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:05,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430053043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:05,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:05,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:05,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796389046] [2022-03-01 17:47:05,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:05,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:05,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:05,440 INFO L87 Difference]: Start difference. First operand 1324 states and 5241 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:05,809 INFO L93 Difference]: Finished difference Result 2764 states and 10705 transitions. [2022-03-01 17:47:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:47:05,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:05,815 INFO L225 Difference]: With dead ends: 2764 [2022-03-01 17:47:05,815 INFO L226 Difference]: Without dead ends: 2683 [2022-03-01 17:47:05,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:05,816 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 283 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:05,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 100 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 642 Invalid, 0 Unknown, 309 Unchecked, 0.2s Time] [2022-03-01 17:47:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-03-01 17:47:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1318. [2022-03-01 17:47:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.9696279422930902) internal successors, (5228), 1317 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 5228 transitions. [2022-03-01 17:47:05,839 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 5228 transitions. Word has length 26 [2022-03-01 17:47:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 5228 transitions. [2022-03-01 17:47:05,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 5228 transitions. [2022-03-01 17:47:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:05,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:05,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:05,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:47:06,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 17:47:06,058 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1583944559, now seen corresponding path program 1 times [2022-03-01 17:47:06,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:06,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173253950] [2022-03-01 17:47:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:06,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:06,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:06,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173253950] [2022-03-01 17:47:06,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173253950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:06,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444019168] [2022-03-01 17:47:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:06,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:06,141 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:06,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:47:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:06,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:06,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:06,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:06,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:06,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444019168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:06,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:06,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:06,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534380337] [2022-03-01 17:47:06,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:06,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:06,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:06,482 INFO L87 Difference]: Start difference. First operand 1318 states and 5228 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:06,974 INFO L93 Difference]: Finished difference Result 2530 states and 9789 transitions. [2022-03-01 17:47:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:47:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:06,979 INFO L225 Difference]: With dead ends: 2530 [2022-03-01 17:47:06,980 INFO L226 Difference]: Without dead ends: 2509 [2022-03-01 17:47:06,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:06,980 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:06,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 123 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 897 Invalid, 0 Unknown, 329 Unchecked, 0.4s Time] [2022-03-01 17:47:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-03-01 17:47:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1324. [2022-03-01 17:47:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9614512471655328) internal successors, (5241), 1323 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5241 transitions. [2022-03-01 17:47:07,003 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5241 transitions. Word has length 26 [2022-03-01 17:47:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5241 transitions. [2022-03-01 17:47:07,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5241 transitions. [2022-03-01 17:47:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:07,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:07,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:07,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:07,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:47:07,211 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1472420496, now seen corresponding path program 1 times [2022-03-01 17:47:07,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:07,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225700074] [2022-03-01 17:47:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:07,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225700074] [2022-03-01 17:47:07,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225700074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:07,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003110214] [2022-03-01 17:47:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:07,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:07,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:07,296 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:07,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:47:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:07,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:07,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:07,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:07,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:07,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:07,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003110214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:07,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:07,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:07,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017634316] [2022-03-01 17:47:07,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:07,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:07,658 INFO L87 Difference]: Start difference. First operand 1324 states and 5241 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:08,094 INFO L93 Difference]: Finished difference Result 2455 states and 9513 transitions. [2022-03-01 17:47:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:47:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:08,100 INFO L225 Difference]: With dead ends: 2455 [2022-03-01 17:47:08,100 INFO L226 Difference]: Without dead ends: 2384 [2022-03-01 17:47:08,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:08,100 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 276 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:08,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 82 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 764 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-03-01 17:47:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-03-01 17:47:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1326. [2022-03-01 17:47:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.972830188679245) internal successors, (5264), 1325 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 5264 transitions. [2022-03-01 17:47:08,123 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 5264 transitions. Word has length 26 [2022-03-01 17:47:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:08,123 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 5264 transitions. [2022-03-01 17:47:08,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 5264 transitions. [2022-03-01 17:47:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:08,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:08,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:08,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:08,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 17:47:08,335 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash -852154415, now seen corresponding path program 1 times [2022-03-01 17:47:08,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:08,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058233298] [2022-03-01 17:47:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:08,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:08,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058233298] [2022-03-01 17:47:08,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058233298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:08,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817003163] [2022-03-01 17:47:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:08,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:08,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:08,428 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:08,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:47:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:08,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:08,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:08,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:08,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:08,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:08,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:08,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817003163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:08,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:08,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:08,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317058753] [2022-03-01 17:47:08,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:08,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:08,777 INFO L87 Difference]: Start difference. First operand 1326 states and 5264 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:09,356 INFO L93 Difference]: Finished difference Result 2327 states and 8999 transitions. [2022-03-01 17:47:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:47:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:09,361 INFO L225 Difference]: With dead ends: 2327 [2022-03-01 17:47:09,361 INFO L226 Difference]: Without dead ends: 2286 [2022-03-01 17:47:09,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:09,362 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 208 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:09,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 113 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1180 Invalid, 0 Unknown, 152 Unchecked, 0.4s Time] [2022-03-01 17:47:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-01 17:47:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1332. [2022-03-01 17:47:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.9691960931630352) internal successors, (5283), 1331 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 5283 transitions. [2022-03-01 17:47:09,384 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 5283 transitions. Word has length 26 [2022-03-01 17:47:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:09,384 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 5283 transitions. [2022-03-01 17:47:09,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 5283 transitions. [2022-03-01 17:47:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:09,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:09,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:09,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:09,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:09,587 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:09,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1357713040, now seen corresponding path program 1 times [2022-03-01 17:47:09,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:09,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959837369] [2022-03-01 17:47:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:09,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:09,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959837369] [2022-03-01 17:47:09,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959837369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463086336] [2022-03-01 17:47:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:09,663 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:09,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:47:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:09,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:09,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:09,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:09,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:09,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:09,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463086336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:10,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:10,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:10,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109973468] [2022-03-01 17:47:10,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:10,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:10,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:10,015 INFO L87 Difference]: Start difference. First operand 1332 states and 5283 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:10,360 INFO L93 Difference]: Finished difference Result 2137 states and 8274 transitions. [2022-03-01 17:47:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:47:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:10,364 INFO L225 Difference]: With dead ends: 2137 [2022-03-01 17:47:10,364 INFO L226 Difference]: Without dead ends: 2066 [2022-03-01 17:47:10,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:47:10,364 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 159 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:10,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 134 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 866 Invalid, 0 Unknown, 358 Unchecked, 0.3s Time] [2022-03-01 17:47:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-03-01 17:47:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1294. [2022-03-01 17:47:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9729311678267596) internal successors, (5137), 1293 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5137 transitions. [2022-03-01 17:47:10,386 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5137 transitions. Word has length 26 [2022-03-01 17:47:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:10,386 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 5137 transitions. [2022-03-01 17:47:10,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5137 transitions. [2022-03-01 17:47:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:10,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:10,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:10,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:10,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-01 17:47:10,603 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2004238780, now seen corresponding path program 7 times [2022-03-01 17:47:10,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:10,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723420672] [2022-03-01 17:47:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:10,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723420672] [2022-03-01 17:47:10,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723420672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:10,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562954381] [2022-03-01 17:47:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:10,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:10,686 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:10,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:47:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:10,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:10,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:10,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:10,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562954381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:10,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:10,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:47:10,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555359581] [2022-03-01 17:47:10,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:10,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:10,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:10,945 INFO L87 Difference]: Start difference. First operand 1294 states and 5137 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:11,299 INFO L93 Difference]: Finished difference Result 1808 states and 7151 transitions. [2022-03-01 17:47:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:47:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:11,302 INFO L225 Difference]: With dead ends: 1808 [2022-03-01 17:47:11,302 INFO L226 Difference]: Without dead ends: 1735 [2022-03-01 17:47:11,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:11,303 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:11,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 72 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 796 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-03-01 17:47:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-03-01 17:47:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1315. [2022-03-01 17:47:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 3.9733637747336377) internal successors, (5221), 1314 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 5221 transitions. [2022-03-01 17:47:11,323 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 5221 transitions. Word has length 26 [2022-03-01 17:47:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:11,324 INFO L470 AbstractCegarLoop]: Abstraction has 1315 states and 5221 transitions. [2022-03-01 17:47:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 5221 transitions. [2022-03-01 17:47:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:11,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:11,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:11,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:11,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:11,542 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -97195330, now seen corresponding path program 8 times [2022-03-01 17:47:11,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:11,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676430522] [2022-03-01 17:47:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:11,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:11,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676430522] [2022-03-01 17:47:11,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676430522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:11,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831151388] [2022-03-01 17:47:11,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:11,656 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:11,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:47:11,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:11,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:47:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:11,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:11,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:11,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:12,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:12,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:47:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:12,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831151388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:12,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:12,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-01 17:47:12,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482769185] [2022-03-01 17:47:12,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:12,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:47:12,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:47:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:47:12,037 INFO L87 Difference]: Start difference. First operand 1315 states and 5221 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:12,635 INFO L93 Difference]: Finished difference Result 1813 states and 7188 transitions. [2022-03-01 17:47:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:47:12,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:12,638 INFO L225 Difference]: With dead ends: 1813 [2022-03-01 17:47:12,638 INFO L226 Difference]: Without dead ends: 1738 [2022-03-01 17:47:12,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:47:12,639 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 107 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:47:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-03-01 17:47:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1306. [2022-03-01 17:47:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.971647509578544) internal successors, (5183), 1305 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5183 transitions. [2022-03-01 17:47:12,657 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5183 transitions. Word has length 26 [2022-03-01 17:47:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:12,657 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5183 transitions. [2022-03-01 17:47:12,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5183 transitions. [2022-03-01 17:47:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:12,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:12,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:12,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:12,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:12,876 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 792300773, now seen corresponding path program 7 times [2022-03-01 17:47:12,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:12,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641494155] [2022-03-01 17:47:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:12,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:12,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641494155] [2022-03-01 17:47:12,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641494155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:12,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97219545] [2022-03-01 17:47:12,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:12,987 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:12,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:47:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:13,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:13,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:13,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:13,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:13,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:13,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:13,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97219545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:13,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:13,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-01 17:47:13,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092390566] [2022-03-01 17:47:13,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:13,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:47:13,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:47:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:47:13,344 INFO L87 Difference]: Start difference. First operand 1306 states and 5183 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:14,071 INFO L93 Difference]: Finished difference Result 1855 states and 7330 transitions. [2022-03-01 17:47:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:47:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:14,074 INFO L225 Difference]: With dead ends: 1855 [2022-03-01 17:47:14,075 INFO L226 Difference]: Without dead ends: 1773 [2022-03-01 17:47:14,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:47:14,075 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:14,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1224 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-03-01 17:47:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-03-01 17:47:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1308. [2022-03-01 17:47:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.9739862280030605) internal successors, (5194), 1307 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 5194 transitions. [2022-03-01 17:47:14,094 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 5194 transitions. Word has length 26 [2022-03-01 17:47:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:14,095 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 5194 transitions. [2022-03-01 17:47:14,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 5194 transitions. [2022-03-01 17:47:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:14,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:14,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:14,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:47:14,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:14,304 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1200629221, now seen corresponding path program 8 times [2022-03-01 17:47:14,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:14,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872416281] [2022-03-01 17:47:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:14,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:14,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872416281] [2022-03-01 17:47:14,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872416281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:14,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724499308] [2022-03-01 17:47:14,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:14,414 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:47:14,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:47:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:14,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:14,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:15,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:15,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:47:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:15,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724499308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:15,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:15,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:47:15,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881456384] [2022-03-01 17:47:15,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:15,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:47:15,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:47:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:15,048 INFO L87 Difference]: Start difference. First operand 1308 states and 5194 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:18,252 INFO L93 Difference]: Finished difference Result 5298 states and 19696 transitions. [2022-03-01 17:47:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 17:47:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:18,262 INFO L225 Difference]: With dead ends: 5298 [2022-03-01 17:47:18,262 INFO L226 Difference]: Without dead ends: 4835 [2022-03-01 17:47:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1332, Invalid=6678, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 17:47:18,263 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1076 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1344 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:18,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 331 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2355 Invalid, 0 Unknown, 1344 Unchecked, 1.0s Time] [2022-03-01 17:47:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-03-01 17:47:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1343. [2022-03-01 17:47:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 4.004470938897168) internal successors, (5374), 1342 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 5374 transitions. [2022-03-01 17:47:18,298 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 5374 transitions. Word has length 26 [2022-03-01 17:47:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:18,298 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 5374 transitions. [2022-03-01 17:47:18,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 5374 transitions. [2022-03-01 17:47:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:18,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:18,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:18,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:18,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:18,532 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash -458752760, now seen corresponding path program 9 times [2022-03-01 17:47:18,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:18,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424197719] [2022-03-01 17:47:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:18,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:18,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424197719] [2022-03-01 17:47:18,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424197719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:18,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878601580] [2022-03-01 17:47:18,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:18,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:18,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:18,631 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:18,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:47:18,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:47:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:18,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:18,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:19,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:19,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:47:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:19,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878601580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:19,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:19,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:47:19,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556968437] [2022-03-01 17:47:19,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:19,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:47:19,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:47:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:47:19,189 INFO L87 Difference]: Start difference. First operand 1343 states and 5374 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:20,792 INFO L93 Difference]: Finished difference Result 3185 states and 12295 transitions. [2022-03-01 17:47:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:47:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:20,799 INFO L225 Difference]: With dead ends: 3185 [2022-03-01 17:47:20,799 INFO L226 Difference]: Without dead ends: 3036 [2022-03-01 17:47:20,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=734, Invalid=3172, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:47:20,799 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 612 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1654 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:20,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 271 Invalid, 3705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1929 Invalid, 0 Unknown, 1654 Unchecked, 0.6s Time] [2022-03-01 17:47:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-03-01 17:47:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 1380. [2022-03-01 17:47:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.992748368382886) internal successors, (5506), 1379 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5506 transitions. [2022-03-01 17:47:20,825 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5506 transitions. Word has length 26 [2022-03-01 17:47:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:20,825 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 5506 transitions. [2022-03-01 17:47:20,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5506 transitions. [2022-03-01 17:47:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:20,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:20,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:21,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:47:21,042 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2035193115, now seen corresponding path program 9 times [2022-03-01 17:47:21,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:21,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966881117] [2022-03-01 17:47:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:21,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966881117] [2022-03-01 17:47:21,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966881117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:21,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147693821] [2022-03-01 17:47:21,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:21,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:21,135 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:21,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:47:21,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:47:21,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:47:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:21,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:21,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:21,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:21,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:47:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147693821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:21,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:21,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:47:21,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176441576] [2022-03-01 17:47:21,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:47:21,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:47:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:21,721 INFO L87 Difference]: Start difference. First operand 1380 states and 5506 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:23,519 INFO L93 Difference]: Finished difference Result 3229 states and 12610 transitions. [2022-03-01 17:47:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:47:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:23,525 INFO L225 Difference]: With dead ends: 3229 [2022-03-01 17:47:23,526 INFO L226 Difference]: Without dead ends: 3107 [2022-03-01 17:47:23,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=647, Invalid=3259, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:47:23,526 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 598 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2098 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:23,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 206 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1574 Invalid, 0 Unknown, 2098 Unchecked, 0.6s Time] [2022-03-01 17:47:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-03-01 17:47:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 1369. [2022-03-01 17:47:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.999269005847953) internal successors, (5471), 1368 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 5471 transitions. [2022-03-01 17:47:23,552 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 5471 transitions. Word has length 26 [2022-03-01 17:47:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 5471 transitions. [2022-03-01 17:47:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 5471 transitions. [2022-03-01 17:47:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:23,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:23,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:23,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:23,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:47:23,759 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -66469456, now seen corresponding path program 10 times [2022-03-01 17:47:23,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:23,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804487731] [2022-03-01 17:47:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:23,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:23,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804487731] [2022-03-01 17:47:23,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804487731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:23,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768515521] [2022-03-01 17:47:23,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:23,868 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:23,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:47:23,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:24,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:24,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:24,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:24,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:24,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:24,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:24,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768515521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:24,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:24,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:24,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839770278] [2022-03-01 17:47:24,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:24,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:24,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:24,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:24,154 INFO L87 Difference]: Start difference. First operand 1369 states and 5471 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:24,508 INFO L93 Difference]: Finished difference Result 2240 states and 8958 transitions. [2022-03-01 17:47:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:47:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:24,513 INFO L225 Difference]: With dead ends: 2240 [2022-03-01 17:47:24,513 INFO L226 Difference]: Without dead ends: 2157 [2022-03-01 17:47:24,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:47:24,513 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:24,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 111 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 693 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-03-01 17:47:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-03-01 17:47:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1395. [2022-03-01 17:47:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.9878048780487805) internal successors, (5559), 1394 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 5559 transitions. [2022-03-01 17:47:24,535 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 5559 transitions. Word has length 26 [2022-03-01 17:47:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:24,535 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 5559 transitions. [2022-03-01 17:47:24,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 5559 transitions. [2022-03-01 17:47:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:24,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:24,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:24,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 17:47:24,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 17:47:24,751 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -177993519, now seen corresponding path program 10 times [2022-03-01 17:47:24,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:24,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772964043] [2022-03-01 17:47:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:24,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:24,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:24,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772964043] [2022-03-01 17:47:24,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772964043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:24,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99941418] [2022-03-01 17:47:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:24,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:24,843 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:24,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:47:24,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:24,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:24,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:25,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:25,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:25,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99941418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:25,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:25,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:25,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682872781] [2022-03-01 17:47:25,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:25,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:25,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:25,092 INFO L87 Difference]: Start difference. First operand 1395 states and 5559 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:25,584 INFO L93 Difference]: Finished difference Result 2647 states and 10357 transitions. [2022-03-01 17:47:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:47:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:25,590 INFO L225 Difference]: With dead ends: 2647 [2022-03-01 17:47:25,590 INFO L226 Difference]: Without dead ends: 2576 [2022-03-01 17:47:25,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:25,591 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 249 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:25,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 125 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 985 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-03-01 17:47:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-03-01 17:47:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1389. [2022-03-01 17:47:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.9855907780979827) internal successors, (5532), 1388 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 5532 transitions. [2022-03-01 17:47:25,644 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 5532 transitions. Word has length 26 [2022-03-01 17:47:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:25,644 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 5532 transitions. [2022-03-01 17:47:25,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 5532 transitions. [2022-03-01 17:47:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:25,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:25,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:25,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:25,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:25,857 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash 823120856, now seen corresponding path program 11 times [2022-03-01 17:47:25,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:25,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174942124] [2022-03-01 17:47:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:25,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174942124] [2022-03-01 17:47:25,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174942124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:25,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544736533] [2022-03-01 17:47:25,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:25,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:25,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:25,952 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:25,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:47:25,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:26,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:26,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:26,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:26,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:26,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:26,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544736533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:26,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:26,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-01 17:47:26,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657706866] [2022-03-01 17:47:26,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:26,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:47:26,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:47:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:47:26,268 INFO L87 Difference]: Start difference. First operand 1389 states and 5532 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:26,645 INFO L93 Difference]: Finished difference Result 2458 states and 9674 transitions. [2022-03-01 17:47:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:47:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:26,650 INFO L225 Difference]: With dead ends: 2458 [2022-03-01 17:47:26,651 INFO L226 Difference]: Without dead ends: 2387 [2022-03-01 17:47:26,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:26,651 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:26,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 132 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1062 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-03-01 17:47:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-03-01 17:47:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1369. [2022-03-01 17:47:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.999269005847953) internal successors, (5471), 1368 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 5471 transitions. [2022-03-01 17:47:26,675 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 5471 transitions. Word has length 26 [2022-03-01 17:47:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:26,675 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 5471 transitions. [2022-03-01 17:47:26,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 5471 transitions. [2022-03-01 17:47:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:26,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:26,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:26,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:26,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:26,893 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash -332652938, now seen corresponding path program 13 times [2022-03-01 17:47:26,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:26,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053612680] [2022-03-01 17:47:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:26,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:26,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:26,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053612680] [2022-03-01 17:47:26,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053612680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:26,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877816581] [2022-03-01 17:47:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:26,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:26,972 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:26,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:47:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:27,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:27,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:27,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:27,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:27,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:27,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:27,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877816581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:27,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:27,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:27,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24462874] [2022-03-01 17:47:27,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:27,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:27,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:27,271 INFO L87 Difference]: Start difference. First operand 1369 states and 5471 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:27,564 INFO L93 Difference]: Finished difference Result 1759 states and 6960 transitions. [2022-03-01 17:47:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:47:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:27,568 INFO L225 Difference]: With dead ends: 1759 [2022-03-01 17:47:27,568 INFO L226 Difference]: Without dead ends: 1708 [2022-03-01 17:47:27,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:47:27,568 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:27,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 66 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 687 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-03-01 17:47:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-03-01 17:47:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1375. [2022-03-01 17:47:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 4.000727802037845) internal successors, (5497), 1374 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 5497 transitions. [2022-03-01 17:47:27,603 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 5497 transitions. Word has length 26 [2022-03-01 17:47:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:27,604 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 5497 transitions. [2022-03-01 17:47:27,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 5497 transitions. [2022-03-01 17:47:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:27,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:27,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:27,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:27,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:27,821 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1478895146, now seen corresponding path program 14 times [2022-03-01 17:47:27,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:27,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635184363] [2022-03-01 17:47:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:27,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:27,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:27,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635184363] [2022-03-01 17:47:27,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635184363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:27,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541929453] [2022-03-01 17:47:27,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:27,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:27,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:27,892 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:27,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:47:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:28,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:28,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:28,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:28,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:28,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:28,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541929453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:28,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:28,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:28,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892085907] [2022-03-01 17:47:28,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:28,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:28,523 INFO L87 Difference]: Start difference. First operand 1375 states and 5497 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:29,665 INFO L93 Difference]: Finished difference Result 2492 states and 9636 transitions. [2022-03-01 17:47:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:47:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:29,670 INFO L225 Difference]: With dead ends: 2492 [2022-03-01 17:47:29,670 INFO L226 Difference]: Without dead ends: 2402 [2022-03-01 17:47:29,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:47:29,671 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:29,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 152 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1361 Invalid, 0 Unknown, 189 Unchecked, 0.5s Time] [2022-03-01 17:47:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-03-01 17:47:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1366. [2022-03-01 17:47:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 4.002197802197802) internal successors, (5463), 1365 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 5463 transitions. [2022-03-01 17:47:29,693 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 5463 transitions. Word has length 26 [2022-03-01 17:47:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:29,693 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 5463 transitions. [2022-03-01 17:47:29,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 5463 transitions. [2022-03-01 17:47:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:29,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:29,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:29,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:29,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:29,911 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -581146886, now seen corresponding path program 15 times [2022-03-01 17:47:29,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:29,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88321259] [2022-03-01 17:47:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:29,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:29,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88321259] [2022-03-01 17:47:29,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88321259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:29,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335653670] [2022-03-01 17:47:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:29,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:29,960 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:29,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:47:29,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:30,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:30,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:30,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:30,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:30,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:30,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335653670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:30,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:30,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:30,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577881719] [2022-03-01 17:47:30,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:30,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:30,379 INFO L87 Difference]: Start difference. First operand 1366 states and 5463 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:31,985 INFO L93 Difference]: Finished difference Result 2460 states and 9545 transitions. [2022-03-01 17:47:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:47:31,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:31,990 INFO L225 Difference]: With dead ends: 2460 [2022-03-01 17:47:31,990 INFO L226 Difference]: Without dead ends: 2379 [2022-03-01 17:47:31,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:47:31,991 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 335 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:31,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 140 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1619 Invalid, 0 Unknown, 357 Unchecked, 0.6s Time] [2022-03-01 17:47:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-03-01 17:47:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1357. [2022-03-01 17:47:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 4.0007374631268435) internal successors, (5425), 1356 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 5425 transitions. [2022-03-01 17:47:32,013 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 5425 transitions. Word has length 26 [2022-03-01 17:47:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 5425 transitions. [2022-03-01 17:47:32,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 5425 transitions. [2022-03-01 17:47:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:32,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:32,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:32,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:32,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:32,231 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1764578344, now seen corresponding path program 16 times [2022-03-01 17:47:32,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:32,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328407037] [2022-03-01 17:47:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:32,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:32,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328407037] [2022-03-01 17:47:32,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328407037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:32,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962298160] [2022-03-01 17:47:32,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:32,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:32,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:32,281 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:32,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:47:32,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:32,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:32,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:32,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:32,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:32,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:32,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:32,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962298160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:32,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:32,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:32,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000006074] [2022-03-01 17:47:32,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:32,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:32,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:32,583 INFO L87 Difference]: Start difference. First operand 1357 states and 5425 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:32,768 INFO L93 Difference]: Finished difference Result 1730 states and 6842 transitions. [2022-03-01 17:47:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:47:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:32,772 INFO L225 Difference]: With dead ends: 1730 [2022-03-01 17:47:32,772 INFO L226 Difference]: Without dead ends: 1677 [2022-03-01 17:47:32,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:47:32,772 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:32,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 72 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 621 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-03-01 17:47:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-03-01 17:47:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1349. [2022-03-01 17:47:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.999258160237389) internal successors, (5391), 1348 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 5391 transitions. [2022-03-01 17:47:32,792 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 5391 transitions. Word has length 26 [2022-03-01 17:47:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:32,792 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 5391 transitions. [2022-03-01 17:47:32,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 5391 transitions. [2022-03-01 17:47:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:32,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:32,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:32,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 17:47:33,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 17:47:33,011 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2142950437, now seen corresponding path program 14 times [2022-03-01 17:47:33,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:33,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476859340] [2022-03-01 17:47:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:33,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:33,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476859340] [2022-03-01 17:47:33,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476859340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:33,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671766754] [2022-03-01 17:47:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:33,086 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:33,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:47:33,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:33,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:33,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:33,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:47:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:33,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:47:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671766754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:33,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:33,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:47:33,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624864683] [2022-03-01 17:47:33,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:33,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:33,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:33,375 INFO L87 Difference]: Start difference. First operand 1349 states and 5391 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:33,610 INFO L93 Difference]: Finished difference Result 1921 states and 7579 transitions. [2022-03-01 17:47:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:33,614 INFO L225 Difference]: With dead ends: 1921 [2022-03-01 17:47:33,614 INFO L226 Difference]: Without dead ends: 1849 [2022-03-01 17:47:33,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:33,614 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:33,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 91 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 757 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2022-03-01 17:47:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2022-03-01 17:47:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1335. [2022-03-01 17:47:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 4.001499250374812) internal successors, (5338), 1334 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 5338 transitions. [2022-03-01 17:47:33,634 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 5338 transitions. Word has length 26 [2022-03-01 17:47:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:33,634 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 5338 transitions. [2022-03-01 17:47:33,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 5338 transitions. [2022-03-01 17:47:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:33,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:33,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:33,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:33,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 17:47:33,852 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1881958770, now seen corresponding path program 17 times [2022-03-01 17:47:33,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:33,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313477308] [2022-03-01 17:47:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313477308] [2022-03-01 17:47:33,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313477308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869122234] [2022-03-01 17:47:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:33,910 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:33,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:47:33,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:34,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:34,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 17:47:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:34,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:34,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:34,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:34,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:34,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869122234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:34,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:34,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:47:34,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801871224] [2022-03-01 17:47:34,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:34,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:34,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:34,142 INFO L87 Difference]: Start difference. First operand 1335 states and 5338 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:34,431 INFO L93 Difference]: Finished difference Result 1802 states and 7130 transitions. [2022-03-01 17:47:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:34,435 INFO L225 Difference]: With dead ends: 1802 [2022-03-01 17:47:34,435 INFO L226 Difference]: Without dead ends: 1721 [2022-03-01 17:47:34,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:34,435 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:34,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 76 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:47:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-03-01 17:47:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1374. [2022-03-01 17:47:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.98761835396941) internal successors, (5475), 1373 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 5475 transitions. [2022-03-01 17:47:34,454 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 5475 transitions. Word has length 26 [2022-03-01 17:47:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:34,454 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 5475 transitions. [2022-03-01 17:47:34,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 5475 transitions. [2022-03-01 17:47:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:34,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:34,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:34,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:34,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-01 17:47:34,663 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1993482833, now seen corresponding path program 15 times [2022-03-01 17:47:34,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:34,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864054216] [2022-03-01 17:47:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:34,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:34,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:34,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864054216] [2022-03-01 17:47:34,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864054216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:34,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848378809] [2022-03-01 17:47:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:34,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:34,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:34,730 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:34,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:47:34,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:47:34,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:34,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:34,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:34,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:35,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:35,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:35,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848378809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:35,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:35,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-01 17:47:35,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451210592] [2022-03-01 17:47:35,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:35,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:47:35,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:47:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:47:35,138 INFO L87 Difference]: Start difference. First operand 1374 states and 5475 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:35,916 INFO L93 Difference]: Finished difference Result 2384 states and 9235 transitions. [2022-03-01 17:47:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:47:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:35,920 INFO L225 Difference]: With dead ends: 2384 [2022-03-01 17:47:35,920 INFO L226 Difference]: Without dead ends: 2149 [2022-03-01 17:47:35,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:47:35,921 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:35,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 116 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1158 Invalid, 0 Unknown, 513 Unchecked, 0.4s Time] [2022-03-01 17:47:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-03-01 17:47:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2022-03-01 17:47:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.9992748368382887) internal successors, (5515), 1379 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5515 transitions. [2022-03-01 17:47:35,944 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5515 transitions. Word has length 26 [2022-03-01 17:47:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 5515 transitions. [2022-03-01 17:47:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5515 transitions. [2022-03-01 17:47:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:35,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:35,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:35,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-01 17:47:36,162 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1223631284, now seen corresponding path program 18 times [2022-03-01 17:47:36,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:36,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057352165] [2022-03-01 17:47:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:36,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:36,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057352165] [2022-03-01 17:47:36,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057352165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:36,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672848370] [2022-03-01 17:47:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:36,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:36,239 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:36,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:47:36,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:36,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:36,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:36,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:36,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:36,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:36,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672848370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:36,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:36,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:36,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44249605] [2022-03-01 17:47:36,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:36,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:36,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:36,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:36,764 INFO L87 Difference]: Start difference. First operand 1380 states and 5515 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:39,455 INFO L93 Difference]: Finished difference Result 3987 states and 15084 transitions. [2022-03-01 17:47:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:47:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:39,464 INFO L225 Difference]: With dead ends: 3987 [2022-03-01 17:47:39,464 INFO L226 Difference]: Without dead ends: 3726 [2022-03-01 17:47:39,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:47:39,465 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 710 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:39,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 211 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:47:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2022-03-01 17:47:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 1410. [2022-03-01 17:47:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 4.0134847409510295) internal successors, (5655), 1409 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5655 transitions. [2022-03-01 17:47:39,494 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5655 transitions. Word has length 26 [2022-03-01 17:47:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:39,494 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 5655 transitions. [2022-03-01 17:47:39,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5655 transitions. [2022-03-01 17:47:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:39,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:39,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:39,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:39,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:39,711 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1887904554, now seen corresponding path program 19 times [2022-03-01 17:47:39,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:39,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416272204] [2022-03-01 17:47:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:39,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:39,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416272204] [2022-03-01 17:47:39,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416272204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:39,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814191939] [2022-03-01 17:47:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:39,774 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:39,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:47:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:39,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:39,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:39,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:39,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:40,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:40,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:40,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814191939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:40,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:40,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:40,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247465860] [2022-03-01 17:47:40,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:40,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:40,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:40,078 INFO L87 Difference]: Start difference. First operand 1410 states and 5655 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:40,338 INFO L93 Difference]: Finished difference Result 1817 states and 7222 transitions. [2022-03-01 17:47:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:40,342 INFO L225 Difference]: With dead ends: 1817 [2022-03-01 17:47:40,342 INFO L226 Difference]: Without dead ends: 1734 [2022-03-01 17:47:40,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:40,342 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:40,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 71 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:47:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-03-01 17:47:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1410. [2022-03-01 17:47:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 4.01277501774308) internal successors, (5654), 1409 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5654 transitions. [2022-03-01 17:47:40,361 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5654 transitions. Word has length 26 [2022-03-01 17:47:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:40,361 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 5654 transitions. [2022-03-01 17:47:40,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5654 transitions. [2022-03-01 17:47:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:40,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:40,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:40,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:40,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:40,579 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -430251061, now seen corresponding path program 16 times [2022-03-01 17:47:40,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:40,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141267368] [2022-03-01 17:47:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:40,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141267368] [2022-03-01 17:47:40,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141267368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:40,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572116458] [2022-03-01 17:47:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:40,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:40,666 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:40,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:47:40,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:40,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:40,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:40,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:40,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572116458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:40,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:40,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:40,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150539173] [2022-03-01 17:47:40,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:40,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:40,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:40,909 INFO L87 Difference]: Start difference. First operand 1410 states and 5654 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:41,239 INFO L93 Difference]: Finished difference Result 1867 states and 7390 transitions. [2022-03-01 17:47:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:41,242 INFO L225 Difference]: With dead ends: 1867 [2022-03-01 17:47:41,242 INFO L226 Difference]: Without dead ends: 1785 [2022-03-01 17:47:41,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:41,243 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 54 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-03-01 17:47:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1412. [2022-03-01 17:47:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 4.005669737774628) internal successors, (5652), 1411 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5652 transitions. [2022-03-01 17:47:41,262 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5652 transitions. Word has length 26 [2022-03-01 17:47:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:41,262 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 5652 transitions. [2022-03-01 17:47:41,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5652 transitions. [2022-03-01 17:47:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:41,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:41,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:41,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:41,470 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:41,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1050102391, now seen corresponding path program 17 times [2022-03-01 17:47:41,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:41,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182977556] [2022-03-01 17:47:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:41,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:41,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182977556] [2022-03-01 17:47:41,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182977556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:41,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534211838] [2022-03-01 17:47:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:41,547 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:41,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:47:41,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:41,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:41,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:41,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:41,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:41,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:41,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:41,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534211838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:41,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:41,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:41,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466955983] [2022-03-01 17:47:41,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:41,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:41,831 INFO L87 Difference]: Start difference. First operand 1412 states and 5652 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:42,196 INFO L93 Difference]: Finished difference Result 1857 states and 7354 transitions. [2022-03-01 17:47:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:42,200 INFO L225 Difference]: With dead ends: 1857 [2022-03-01 17:47:42,200 INFO L226 Difference]: Without dead ends: 1775 [2022-03-01 17:47:42,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:42,200 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:42,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-03-01 17:47:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1409. [2022-03-01 17:47:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 4.0078125) internal successors, (5643), 1408 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 5643 transitions. [2022-03-01 17:47:42,219 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 5643 transitions. Word has length 26 [2022-03-01 17:47:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:42,219 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 5643 transitions. [2022-03-01 17:47:42,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 5643 transitions. [2022-03-01 17:47:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:42,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:42,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:42,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:42,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-01 17:47:42,437 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash -460668474, now seen corresponding path program 12 times [2022-03-01 17:47:42,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:42,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539519579] [2022-03-01 17:47:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:42,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:42,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539519579] [2022-03-01 17:47:42,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539519579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:42,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413495436] [2022-03-01 17:47:42,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:42,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:42,501 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:47:42,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:42,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:42,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:42,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:42,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:42,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:43,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413495436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:43,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:43,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:43,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719436186] [2022-03-01 17:47:43,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:43,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:43,032 INFO L87 Difference]: Start difference. First operand 1409 states and 5643 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:46,001 INFO L93 Difference]: Finished difference Result 3924 states and 15014 transitions. [2022-03-01 17:47:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:47:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:46,008 INFO L225 Difference]: With dead ends: 3924 [2022-03-01 17:47:46,009 INFO L226 Difference]: Without dead ends: 3639 [2022-03-01 17:47:46,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:47:46,009 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 653 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:46,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 235 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:47:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-03-01 17:47:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 1448. [2022-03-01 17:47:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 4.025570145127851) internal successors, (5825), 1447 states have internal predecessors, (5825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5825 transitions. [2022-03-01 17:47:46,039 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5825 transitions. Word has length 26 [2022-03-01 17:47:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:46,039 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 5825 transitions. [2022-03-01 17:47:46,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5825 transitions. [2022-03-01 17:47:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:46,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:46,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:46,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:46,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:46,255 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1446374976, now seen corresponding path program 13 times [2022-03-01 17:47:46,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:46,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127852441] [2022-03-01 17:47:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:46,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:46,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:46,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127852441] [2022-03-01 17:47:46,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127852441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:46,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255592822] [2022-03-01 17:47:46,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:46,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:46,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:46,363 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:46,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:47:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:46,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:46,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:46,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:46,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:46,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:46,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:46,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:46,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255592822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:46,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:46,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:46,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410699653] [2022-03-01 17:47:46,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:46,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:46,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:46,669 INFO L87 Difference]: Start difference. First operand 1448 states and 5825 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:46,993 INFO L93 Difference]: Finished difference Result 1803 states and 7191 transitions. [2022-03-01 17:47:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:46,997 INFO L225 Difference]: With dead ends: 1803 [2022-03-01 17:47:46,997 INFO L226 Difference]: Without dead ends: 1728 [2022-03-01 17:47:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:46,997 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:46,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 54 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:47:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-03-01 17:47:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1448. [2022-03-01 17:47:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 4.02418797512094) internal successors, (5823), 1447 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5823 transitions. [2022-03-01 17:47:47,016 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5823 transitions. Word has length 26 [2022-03-01 17:47:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:47,017 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 5823 transitions. [2022-03-01 17:47:47,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5823 transitions. [2022-03-01 17:47:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:47,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:47,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:47,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 17:47:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:47,223 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1959096217, now seen corresponding path program 11 times [2022-03-01 17:47:47,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:47,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448599242] [2022-03-01 17:47:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:47,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:47,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:47,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448599242] [2022-03-01 17:47:47,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448599242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:47,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030470412] [2022-03-01 17:47:47,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:47,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:47,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:47,326 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:47,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:47:47,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:47:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:47,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:47,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:47,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:47,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:47,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:47,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:47,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030470412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:47,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:47,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:47:47,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795298632] [2022-03-01 17:47:47,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:47,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:47,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:47,559 INFO L87 Difference]: Start difference. First operand 1448 states and 5823 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:47,913 INFO L93 Difference]: Finished difference Result 1964 states and 7842 transitions. [2022-03-01 17:47:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:47:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:47,918 INFO L225 Difference]: With dead ends: 1964 [2022-03-01 17:47:47,918 INFO L226 Difference]: Without dead ends: 1864 [2022-03-01 17:47:47,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:47:47,918 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 177 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:47,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 83 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-03-01 17:47:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1450. [2022-03-01 17:47:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 4.024154589371981) internal successors, (5831), 1449 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5831 transitions. [2022-03-01 17:47:47,940 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5831 transitions. Word has length 26 [2022-03-01 17:47:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:47,940 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 5831 transitions. [2022-03-01 17:47:47,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5831 transitions. [2022-03-01 17:47:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:47,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:47,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:47,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:48,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-01 17:47:48,159 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:48,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1550767769, now seen corresponding path program 12 times [2022-03-01 17:47:48,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:48,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916674545] [2022-03-01 17:47:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:48,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:47:48,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916674545] [2022-03-01 17:47:48,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916674545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632444381] [2022-03-01 17:47:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:48,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:48,255 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:47:48,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:47:48,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:47:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:48,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:48,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:48,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:48,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:48,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:47:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:48,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632444381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:48,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:48,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:47:48,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559747820] [2022-03-01 17:47:48,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:48,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:47:48,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:47:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:47:48,731 INFO L87 Difference]: Start difference. First operand 1450 states and 5831 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:50,933 INFO L93 Difference]: Finished difference Result 4754 states and 17329 transitions. [2022-03-01 17:47:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:47:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:50,942 INFO L225 Difference]: With dead ends: 4754 [2022-03-01 17:47:50,942 INFO L226 Difference]: Without dead ends: 3945 [2022-03-01 17:47:50,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1050, Invalid=3506, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:47:50,943 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 930 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:50,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 236 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1984 Invalid, 0 Unknown, 616 Unchecked, 0.7s Time] [2022-03-01 17:47:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2022-03-01 17:47:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 1475. [2022-03-01 17:47:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 4.049525101763908) internal successors, (5969), 1474 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5969 transitions. [2022-03-01 17:47:50,975 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5969 transitions. Word has length 26 [2022-03-01 17:47:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:50,975 INFO L470 AbstractCegarLoop]: Abstraction has 1475 states and 5969 transitions. [2022-03-01 17:47:50,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5969 transitions. [2022-03-01 17:47:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:50,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:50,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:50,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:51,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:51,191 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1084817546, now seen corresponding path program 14 times [2022-03-01 17:47:51,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:51,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36819599] [2022-03-01 17:47:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:51,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36819599] [2022-03-01 17:47:51,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36819599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:51,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718394386] [2022-03-01 17:47:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:51,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:51,272 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:47:51,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:47:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:51,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:51,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:47:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:51,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:51,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:47:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718394386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:51,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:51,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:47:51,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237701688] [2022-03-01 17:47:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:51,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:47:51,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:47:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:47:51,905 INFO L87 Difference]: Start difference. First operand 1475 states and 5969 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:53,140 INFO L93 Difference]: Finished difference Result 2575 states and 9779 transitions. [2022-03-01 17:47:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:47:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:53,145 INFO L225 Difference]: With dead ends: 2575 [2022-03-01 17:47:53,145 INFO L226 Difference]: Without dead ends: 2312 [2022-03-01 17:47:53,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:47:53,145 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 541 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:53,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 195 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1876 Invalid, 0 Unknown, 521 Unchecked, 0.6s Time] [2022-03-01 17:47:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-03-01 17:47:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1519. [2022-03-01 17:47:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.036231884057971) internal successors, (6127), 1518 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6127 transitions. [2022-03-01 17:47:53,167 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6127 transitions. Word has length 26 [2022-03-01 17:47:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:53,168 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 6127 transitions. [2022-03-01 17:47:53,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6127 transitions. [2022-03-01 17:47:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:53,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:53,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:53,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:53,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:53,383 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -491622809, now seen corresponding path program 13 times [2022-03-01 17:47:53,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:53,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234981679] [2022-03-01 17:47:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:53,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234981679] [2022-03-01 17:47:53,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234981679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184053928] [2022-03-01 17:47:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:53,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:53,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:53,452 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:53,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:47:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:53,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:47:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:53,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:53,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:53,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184053928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:53,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:53,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:47:53,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718244124] [2022-03-01 17:47:53,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:53,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:53,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:53,756 INFO L87 Difference]: Start difference. First operand 1519 states and 6127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:54,119 INFO L93 Difference]: Finished difference Result 1915 states and 7637 transitions. [2022-03-01 17:47:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:54,123 INFO L225 Difference]: With dead ends: 1915 [2022-03-01 17:47:54,123 INFO L226 Difference]: Without dead ends: 1844 [2022-03-01 17:47:54,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:54,123 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:54,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 71 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-03-01 17:47:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1498. [2022-03-01 17:47:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 4.049432197728791) internal successors, (6062), 1497 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 6062 transitions. [2022-03-01 17:47:54,143 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 6062 transitions. Word has length 26 [2022-03-01 17:47:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 6062 transitions. [2022-03-01 17:47:54,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 6062 transitions. [2022-03-01 17:47:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:54,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:54,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:54,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:54,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:54,361 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash -417278214, now seen corresponding path program 20 times [2022-03-01 17:47:54,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:54,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852419356] [2022-03-01 17:47:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:54,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:54,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:54,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852419356] [2022-03-01 17:47:54,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852419356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:54,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695810098] [2022-03-01 17:47:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:54,430 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:54,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:47:54,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:54,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:54,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:54,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:54,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:47:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:54,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:54,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:54,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:54,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695810098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:54,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:54,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:47:54,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631952217] [2022-03-01 17:47:54,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:54,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:47:54,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:47:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:47:54,846 INFO L87 Difference]: Start difference. First operand 1498 states and 6062 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:55,725 INFO L93 Difference]: Finished difference Result 2891 states and 11195 transitions. [2022-03-01 17:47:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:47:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:55,730 INFO L225 Difference]: With dead ends: 2891 [2022-03-01 17:47:55,730 INFO L226 Difference]: Without dead ends: 2607 [2022-03-01 17:47:55,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:47:55,731 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 341 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:55,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 146 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1364 Invalid, 0 Unknown, 757 Unchecked, 0.4s Time] [2022-03-01 17:47:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-03-01 17:47:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1536. [2022-03-01 17:47:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 4.037785016286645) internal successors, (6198), 1535 states have internal predecessors, (6198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 6198 transitions. [2022-03-01 17:47:55,755 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 6198 transitions. Word has length 26 [2022-03-01 17:47:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:55,755 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 6198 transitions. [2022-03-01 17:47:55,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 6198 transitions. [2022-03-01 17:47:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:55,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:55,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:55,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:55,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 17:47:55,973 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash -232284556, now seen corresponding path program 15 times [2022-03-01 17:47:55,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:55,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74535382] [2022-03-01 17:47:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:55,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:56,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:56,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74535382] [2022-03-01 17:47:56,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74535382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:56,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435926052] [2022-03-01 17:47:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:56,055 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:56,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:47:56,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:47:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:56,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:56,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:47:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:56,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:56,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:47:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:56,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435926052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:56,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:56,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:47:56,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797133677] [2022-03-01 17:47:56,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:56,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:47:56,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:47:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:56,595 INFO L87 Difference]: Start difference. First operand 1536 states and 6198 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:57,838 INFO L93 Difference]: Finished difference Result 2792 states and 10852 transitions. [2022-03-01 17:47:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:47:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:57,844 INFO L225 Difference]: With dead ends: 2792 [2022-03-01 17:47:57,844 INFO L226 Difference]: Without dead ends: 2564 [2022-03-01 17:47:57,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:47:57,844 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 291 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:57,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 178 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1025 Invalid, 0 Unknown, 806 Unchecked, 0.5s Time] [2022-03-01 17:47:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-03-01 17:47:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1555. [2022-03-01 17:47:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 4.045045045045045) internal successors, (6286), 1554 states have internal predecessors, (6286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 6286 transitions. [2022-03-01 17:47:57,869 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 6286 transitions. Word has length 26 [2022-03-01 17:47:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:57,869 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 6286 transitions. [2022-03-01 17:47:57,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 6286 transitions. [2022-03-01 17:47:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:57,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:57,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:57,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 17:47:58,087 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1531659794, now seen corresponding path program 16 times [2022-03-01 17:47:58,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:58,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401646631] [2022-03-01 17:47:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:58,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:58,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401646631] [2022-03-01 17:47:58,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401646631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:58,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629577012] [2022-03-01 17:47:58,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:58,167 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:58,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:47:58,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:58,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:58,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:58,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:58,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:58,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629577012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:58,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:58,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:47:58,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527349346] [2022-03-01 17:47:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:58,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:58,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:58,562 INFO L87 Difference]: Start difference. First operand 1555 states and 6286 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:58,917 INFO L93 Difference]: Finished difference Result 1944 states and 7785 transitions. [2022-03-01 17:47:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:47:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:58,921 INFO L225 Difference]: With dead ends: 1944 [2022-03-01 17:47:58,921 INFO L226 Difference]: Without dead ends: 1898 [2022-03-01 17:47:58,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:58,921 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:58,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 75 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 757 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-01 17:47:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-03-01 17:47:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1550. [2022-03-01 17:47:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 4.058747579083279) internal successors, (6287), 1549 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6287 transitions. [2022-03-01 17:47:58,942 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6287 transitions. Word has length 26 [2022-03-01 17:47:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:58,942 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 6287 transitions. [2022-03-01 17:47:58,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6287 transitions. [2022-03-01 17:47:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:58,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:58,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:58,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:59,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:59,145 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1747380906, now seen corresponding path program 17 times [2022-03-01 17:47:59,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:59,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964036155] [2022-03-01 17:47:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:59,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:59,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:59,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964036155] [2022-03-01 17:47:59,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964036155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:59,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909313005] [2022-03-01 17:47:59,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:59,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:59,218 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:59,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:47:59,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:59,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:47:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:59,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:59,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:47:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:59,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:59,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:59,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:59,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:59,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909313005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:59,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:59,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:47:59,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207087991] [2022-03-01 17:47:59,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:59,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:59,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:59,563 INFO L87 Difference]: Start difference. First operand 1550 states and 6287 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:59,856 INFO L93 Difference]: Finished difference Result 1961 states and 7854 transitions. [2022-03-01 17:47:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:47:59,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:47:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:59,860 INFO L225 Difference]: With dead ends: 1961 [2022-03-01 17:47:59,860 INFO L226 Difference]: Without dead ends: 1896 [2022-03-01 17:47:59,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:59,860 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:59,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 849 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-03-01 17:47:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-03-01 17:47:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1547. [2022-03-01 17:47:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 4.059508408796895) internal successors, (6276), 1546 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6276 transitions. [2022-03-01 17:47:59,881 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6276 transitions. Word has length 26 [2022-03-01 17:47:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:59,881 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 6276 transitions. [2022-03-01 17:47:59,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6276 transitions. [2022-03-01 17:47:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:47:59,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:59,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:59,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:48:00,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-01 17:48:00,091 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash 625666200, now seen corresponding path program 21 times [2022-03-01 17:48:00,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:00,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520177541] [2022-03-01 17:48:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:00,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520177541] [2022-03-01 17:48:00,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520177541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:00,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075349953] [2022-03-01 17:48:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:00,178 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:00,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:48:00,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:00,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:00,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:00,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:00,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:00,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:00,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075349953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:00,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:00,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:48:00,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022357695] [2022-03-01 17:48:00,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:00,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:00,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:00,544 INFO L87 Difference]: Start difference. First operand 1547 states and 6276 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:01,694 INFO L93 Difference]: Finished difference Result 2986 states and 11630 transitions. [2022-03-01 17:48:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:48:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:01,700 INFO L225 Difference]: With dead ends: 2986 [2022-03-01 17:48:01,700 INFO L226 Difference]: Without dead ends: 2830 [2022-03-01 17:48:01,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=1972, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:48:01,700 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 541 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:01,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 155 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1740 Invalid, 0 Unknown, 651 Unchecked, 0.5s Time] [2022-03-01 17:48:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-03-01 17:48:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 1547. [2022-03-01 17:48:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 4.059508408796895) internal successors, (6276), 1546 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6276 transitions. [2022-03-01 17:48:01,727 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6276 transitions. Word has length 26 [2022-03-01 17:48:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:01,727 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 6276 transitions. [2022-03-01 17:48:01,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6276 transitions. [2022-03-01 17:48:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:01,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:01,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:01,945 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1700970630, now seen corresponding path program 22 times [2022-03-01 17:48:01,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:01,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409090270] [2022-03-01 17:48:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:01,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:02,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409090270] [2022-03-01 17:48:02,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409090270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:02,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094891912] [2022-03-01 17:48:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:02,028 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:02,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:48:02,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:02,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:02,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:02,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:02,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:02,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:02,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094891912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:02,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:02,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:02,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111813612] [2022-03-01 17:48:02,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:02,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:02,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:02,251 INFO L87 Difference]: Start difference. First operand 1547 states and 6276 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:02,483 INFO L93 Difference]: Finished difference Result 1949 states and 7826 transitions. [2022-03-01 17:48:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:02,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:02,486 INFO L225 Difference]: With dead ends: 1949 [2022-03-01 17:48:02,487 INFO L226 Difference]: Without dead ends: 1899 [2022-03-01 17:48:02,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:02,487 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:02,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 75 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 826 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-03-01 17:48:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-03-01 17:48:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1613. [2022-03-01 17:48:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.0576923076923075) internal successors, (6541), 1612 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 6541 transitions. [2022-03-01 17:48:02,509 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 6541 transitions. Word has length 26 [2022-03-01 17:48:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:02,509 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 6541 transitions. [2022-03-01 17:48:02,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 6541 transitions. [2022-03-01 17:48:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:02,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:02,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:02,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:02,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,727 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash -813466949, now seen corresponding path program 1 times [2022-03-01 17:48:02,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:02,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390365970] [2022-03-01 17:48:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:02,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390365970] [2022-03-01 17:48:02,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390365970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:02,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496462137] [2022-03-01 17:48:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:02,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:02,776 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:02,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:48:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:02,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:02,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:03,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:03,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:03,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:03,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496462137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:03,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:03,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:03,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379011066] [2022-03-01 17:48:03,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:03,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:03,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:03,094 INFO L87 Difference]: Start difference. First operand 1613 states and 6541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:03,368 INFO L93 Difference]: Finished difference Result 1950 states and 7800 transitions. [2022-03-01 17:48:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:03,372 INFO L225 Difference]: With dead ends: 1950 [2022-03-01 17:48:03,372 INFO L226 Difference]: Without dead ends: 1877 [2022-03-01 17:48:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:03,372 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:03,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 63 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 674 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-01 17:48:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-03-01 17:48:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1553. [2022-03-01 17:48:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 4.061855670103093) internal successors, (6304), 1552 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 6304 transitions. [2022-03-01 17:48:03,395 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 6304 transitions. Word has length 26 [2022-03-01 17:48:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 6304 transitions. [2022-03-01 17:48:03,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 6304 transitions. [2022-03-01 17:48:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:03,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:03,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:03,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:48:03,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:03,611 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1301697330, now seen corresponding path program 23 times [2022-03-01 17:48:03,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:03,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488298089] [2022-03-01 17:48:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:03,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:03,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488298089] [2022-03-01 17:48:03,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488298089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:03,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489353356] [2022-03-01 17:48:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:03,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:03,664 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:48:03,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:03,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:03,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:03,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:03,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:03,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:03,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:03,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:03,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489353356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:03,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:03,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:03,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949737229] [2022-03-01 17:48:03,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:03,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:03,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:03,914 INFO L87 Difference]: Start difference. First operand 1553 states and 6304 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:04,113 INFO L93 Difference]: Finished difference Result 1925 states and 7717 transitions. [2022-03-01 17:48:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:04,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:04,117 INFO L225 Difference]: With dead ends: 1925 [2022-03-01 17:48:04,117 INFO L226 Difference]: Without dead ends: 1850 [2022-03-01 17:48:04,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:04,117 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:04,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 59 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 662 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-01 17:48:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-03-01 17:48:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1553. [2022-03-01 17:48:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 4.061855670103093) internal successors, (6304), 1552 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 6304 transitions. [2022-03-01 17:48:04,138 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 6304 transitions. Word has length 26 [2022-03-01 17:48:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:04,138 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 6304 transitions. [2022-03-01 17:48:04,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 6304 transitions. [2022-03-01 17:48:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:04,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:04,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:04,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-01 17:48:04,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:04,343 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash 556462674, now seen corresponding path program 18 times [2022-03-01 17:48:04,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:04,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855604280] [2022-03-01 17:48:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:04,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:04,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855604280] [2022-03-01 17:48:04,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855604280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:04,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362023667] [2022-03-01 17:48:04,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:04,423 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:04,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:48:04,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:04,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:04,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:04,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:04,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:48:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:04,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:04,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:05,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362023667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:05,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:05,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:48:05,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130535389] [2022-03-01 17:48:05,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:05,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:05,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:05,036 INFO L87 Difference]: Start difference. First operand 1553 states and 6304 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:05,738 INFO L93 Difference]: Finished difference Result 2391 states and 9389 transitions. [2022-03-01 17:48:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:48:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:05,743 INFO L225 Difference]: With dead ends: 2391 [2022-03-01 17:48:05,744 INFO L226 Difference]: Without dead ends: 2377 [2022-03-01 17:48:05,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:05,744 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:05,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 148 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 912 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-03-01 17:48:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-01 17:48:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1620. [2022-03-01 17:48:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.041383570105003) internal successors, (6543), 1619 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 6543 transitions. [2022-03-01 17:48:05,769 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 6543 transitions. Word has length 26 [2022-03-01 17:48:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:05,769 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 6543 transitions. [2022-03-01 17:48:05,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 6543 transitions. [2022-03-01 17:48:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:05,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:05,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:05,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:48:05,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:05,989 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 585091825, now seen corresponding path program 1 times [2022-03-01 17:48:05,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:05,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069231993] [2022-03-01 17:48:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:06,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069231993] [2022-03-01 17:48:06,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069231993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:06,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523219898] [2022-03-01 17:48:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:06,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:06,075 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:06,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:48:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:06,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:06,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:06,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:06,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:06,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:06,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523219898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:06,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:06,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:48:06,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323848190] [2022-03-01 17:48:06,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:06,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:06,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:06,385 INFO L87 Difference]: Start difference. First operand 1620 states and 6543 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:06,711 INFO L93 Difference]: Finished difference Result 2102 states and 8351 transitions. [2022-03-01 17:48:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:48:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:06,715 INFO L225 Difference]: With dead ends: 2102 [2022-03-01 17:48:06,715 INFO L226 Difference]: Without dead ends: 1998 [2022-03-01 17:48:06,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:48:06,715 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:06,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1024 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-03-01 17:48:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-03-01 17:48:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1582. [2022-03-01 17:48:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 4.036685641998735) internal successors, (6382), 1581 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 6382 transitions. [2022-03-01 17:48:06,737 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 6382 transitions. Word has length 26 [2022-03-01 17:48:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 6382 transitions. [2022-03-01 17:48:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 6382 transitions. [2022-03-01 17:48:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:06,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:06,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:06,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:06,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-01 17:48:06,956 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -630909232, now seen corresponding path program 24 times [2022-03-01 17:48:06,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:06,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803957219] [2022-03-01 17:48:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803957219] [2022-03-01 17:48:07,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803957219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:07,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022923805] [2022-03-01 17:48:07,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:07,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:07,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:07,005 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:07,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:48:07,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:07,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:07,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:07,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:07,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:07,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022923805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:07,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:07,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:07,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946369160] [2022-03-01 17:48:07,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:07,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:07,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:07,532 INFO L87 Difference]: Start difference. First operand 1582 states and 6382 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:08,685 INFO L93 Difference]: Finished difference Result 2691 states and 10517 transitions. [2022-03-01 17:48:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:48:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:08,691 INFO L225 Difference]: With dead ends: 2691 [2022-03-01 17:48:08,691 INFO L226 Difference]: Without dead ends: 2640 [2022-03-01 17:48:08,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:48:08,691 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 328 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:08,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 126 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1142 Invalid, 0 Unknown, 402 Unchecked, 0.4s Time] [2022-03-01 17:48:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-03-01 17:48:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1584. [2022-03-01 17:48:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 4.037902716361339) internal successors, (6392), 1583 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 6392 transitions. [2022-03-01 17:48:08,716 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 6392 transitions. Word has length 26 [2022-03-01 17:48:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 6392 transitions. [2022-03-01 17:48:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 6392 transitions. [2022-03-01 17:48:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:08,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:08,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:08,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:08,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 17:48:08,935 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 479219380, now seen corresponding path program 19 times [2022-03-01 17:48:08,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:08,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476327129] [2022-03-01 17:48:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:09,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476327129] [2022-03-01 17:48:09,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476327129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:09,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242055520] [2022-03-01 17:48:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:09,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:09,010 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:09,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:48:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:09,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:09,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:09,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:09,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242055520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:09,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:09,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:09,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135357685] [2022-03-01 17:48:09,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:09,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:09,316 INFO L87 Difference]: Start difference. First operand 1584 states and 6392 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:09,533 INFO L93 Difference]: Finished difference Result 1939 states and 7762 transitions. [2022-03-01 17:48:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:09,537 INFO L225 Difference]: With dead ends: 1939 [2022-03-01 17:48:09,537 INFO L226 Difference]: Without dead ends: 1866 [2022-03-01 17:48:09,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:09,538 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:09,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 768 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-03-01 17:48:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-03-01 17:48:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1584. [2022-03-01 17:48:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 4.037902716361339) internal successors, (6392), 1583 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 6392 transitions. [2022-03-01 17:48:09,558 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 6392 transitions. Word has length 26 [2022-03-01 17:48:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:09,559 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 6392 transitions. [2022-03-01 17:48:09,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 6392 transitions. [2022-03-01 17:48:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:09,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:09,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:09,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:09,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 17:48:09,762 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1040689780, now seen corresponding path program 20 times [2022-03-01 17:48:09,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:09,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800310685] [2022-03-01 17:48:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:09,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:09,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800310685] [2022-03-01 17:48:09,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800310685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:09,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892859922] [2022-03-01 17:48:09,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:09,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:09,829 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:09,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:48:09,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:09,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:09,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:10,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:10,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892859922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:10,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:10,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:10,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281882218] [2022-03-01 17:48:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:10,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:10,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:10,350 INFO L87 Difference]: Start difference. First operand 1584 states and 6392 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:11,396 INFO L93 Difference]: Finished difference Result 2536 states and 9961 transitions. [2022-03-01 17:48:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:48:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:11,402 INFO L225 Difference]: With dead ends: 2536 [2022-03-01 17:48:11,402 INFO L226 Difference]: Without dead ends: 2468 [2022-03-01 17:48:11,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:48:11,402 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 337 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:11,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 118 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1266 Invalid, 0 Unknown, 418 Unchecked, 0.4s Time] [2022-03-01 17:48:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2022-03-01 17:48:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1591. [2022-03-01 17:48:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 4.041509433962264) internal successors, (6426), 1590 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 6426 transitions. [2022-03-01 17:48:11,427 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 6426 transitions. Word has length 26 [2022-03-01 17:48:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:11,427 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 6426 transitions. [2022-03-01 17:48:11,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 6426 transitions. [2022-03-01 17:48:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:11,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:11,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:11,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 17:48:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:48:11,646 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1871340540, now seen corresponding path program 21 times [2022-03-01 17:48:11,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:11,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622378732] [2022-03-01 17:48:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:11,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:11,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622378732] [2022-03-01 17:48:11,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622378732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:11,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264556470] [2022-03-01 17:48:11,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:11,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:11,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:11,724 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:11,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:48:11,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:11,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:11,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:11,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:12,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:12,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:12,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264556470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:12,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:12,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:12,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193298755] [2022-03-01 17:48:12,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:12,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:12,162 INFO L87 Difference]: Start difference. First operand 1591 states and 6426 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:13,312 INFO L93 Difference]: Finished difference Result 2686 states and 10528 transitions. [2022-03-01 17:48:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:48:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:13,322 INFO L225 Difference]: With dead ends: 2686 [2022-03-01 17:48:13,322 INFO L226 Difference]: Without dead ends: 2597 [2022-03-01 17:48:13,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1512, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:48:13,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:13,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 146 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1598 Invalid, 0 Unknown, 618 Unchecked, 0.5s Time] [2022-03-01 17:48:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-03-01 17:48:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1580. [2022-03-01 17:48:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 4.039898670044332) internal successors, (6379), 1579 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 6379 transitions. [2022-03-01 17:48:13,346 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 6379 transitions. Word has length 26 [2022-03-01 17:48:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:13,346 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 6379 transitions. [2022-03-01 17:48:13,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 6379 transitions. [2022-03-01 17:48:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:13,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:13,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:13,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:13,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:13,586 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1811904697, now seen corresponding path program 18 times [2022-03-01 17:48:13,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:13,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822691593] [2022-03-01 17:48:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:13,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822691593] [2022-03-01 17:48:13,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822691593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:13,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368231857] [2022-03-01 17:48:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:13,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:13,642 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:13,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:48:13,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:48:13,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:13,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:13,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:13,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:13,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:14,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368231857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:14,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:14,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:48:14,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426748284] [2022-03-01 17:48:14,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:14,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:14,058 INFO L87 Difference]: Start difference. First operand 1580 states and 6379 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:15,247 INFO L93 Difference]: Finished difference Result 3393 states and 12940 transitions. [2022-03-01 17:48:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:48:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:15,255 INFO L225 Difference]: With dead ends: 3393 [2022-03-01 17:48:15,255 INFO L226 Difference]: Without dead ends: 3184 [2022-03-01 17:48:15,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:48:15,256 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 443 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:15,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 172 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:48:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-03-01 17:48:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1649. [2022-03-01 17:48:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 4.044296116504855) internal successors, (6665), 1648 states have internal predecessors, (6665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 6665 transitions. [2022-03-01 17:48:15,286 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 6665 transitions. Word has length 26 [2022-03-01 17:48:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:15,286 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 6665 transitions. [2022-03-01 17:48:15,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 6665 transitions. [2022-03-01 17:48:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:15,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:15,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:15,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:48:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 17:48:15,520 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1996898355, now seen corresponding path program 14 times [2022-03-01 17:48:15,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:15,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296777992] [2022-03-01 17:48:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:15,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:15,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296777992] [2022-03-01 17:48:15,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296777992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:15,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224346164] [2022-03-01 17:48:15,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:15,595 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:15,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:48:15,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:15,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:15,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:15,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:16,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:16,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:48:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:16,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224346164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:16,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:16,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:48:16,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396253342] [2022-03-01 17:48:16,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:16,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:48:16,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:16,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:48:16,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:16,324 INFO L87 Difference]: Start difference. First operand 1649 states and 6665 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:18,075 INFO L93 Difference]: Finished difference Result 3373 states and 13035 transitions. [2022-03-01 17:48:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:48:18,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:18,082 INFO L225 Difference]: With dead ends: 3373 [2022-03-01 17:48:18,082 INFO L226 Difference]: Without dead ends: 3072 [2022-03-01 17:48:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=628, Invalid=2912, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:48:18,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 593 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1340 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:18,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 220 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1832 Invalid, 0 Unknown, 1340 Unchecked, 0.7s Time] [2022-03-01 17:48:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-03-01 17:48:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1635. [2022-03-01 17:48:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 4.05875152998776) internal successors, (6632), 1634 states have internal predecessors, (6632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6632 transitions. [2022-03-01 17:48:18,109 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6632 transitions. Word has length 26 [2022-03-01 17:48:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:18,109 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 6632 transitions. [2022-03-01 17:48:18,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6632 transitions. [2022-03-01 17:48:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:18,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:18,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:18,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:18,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:48:18,327 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash 520515783, now seen corresponding path program 19 times [2022-03-01 17:48:18,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:18,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878240882] [2022-03-01 17:48:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:18,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878240882] [2022-03-01 17:48:18,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878240882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:18,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800828108] [2022-03-01 17:48:18,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:18,406 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:18,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:48:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:18,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:18,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:18,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:18,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800828108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:18,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:18,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:18,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528185901] [2022-03-01 17:48:18,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:18,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:18,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:18,768 INFO L87 Difference]: Start difference. First operand 1635 states and 6632 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:19,124 INFO L93 Difference]: Finished difference Result 2090 states and 8373 transitions. [2022-03-01 17:48:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:19,128 INFO L225 Difference]: With dead ends: 2090 [2022-03-01 17:48:19,128 INFO L226 Difference]: Without dead ends: 2035 [2022-03-01 17:48:19,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:19,129 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:19,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 75 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 867 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-03-01 17:48:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-03-01 17:48:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1665. [2022-03-01 17:48:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 4.058894230769231) internal successors, (6754), 1664 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 6754 transitions. [2022-03-01 17:48:19,152 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 6754 transitions. Word has length 26 [2022-03-01 17:48:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:19,152 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 6754 transitions. [2022-03-01 17:48:19,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 6754 transitions. [2022-03-01 17:48:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:19,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:19,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:19,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 17:48:19,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-01 17:48:19,358 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1091962785, now seen corresponding path program 20 times [2022-03-01 17:48:19,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:19,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321998910] [2022-03-01 17:48:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:19,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321998910] [2022-03-01 17:48:19,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321998910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:19,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221377921] [2022-03-01 17:48:19,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:19,438 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:19,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:48:19,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:19,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:48:19,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:19,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:19,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:19,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:19,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:48:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221377921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:19,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:19,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-03-01 17:48:19,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100745536] [2022-03-01 17:48:19,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:19,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:48:19,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:48:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:48:19,835 INFO L87 Difference]: Start difference. First operand 1665 states and 6754 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:21,013 INFO L93 Difference]: Finished difference Result 2630 states and 10368 transitions. [2022-03-01 17:48:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:48:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:21,019 INFO L225 Difference]: With dead ends: 2630 [2022-03-01 17:48:21,019 INFO L226 Difference]: Without dead ends: 2548 [2022-03-01 17:48:21,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=1630, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:48:21,019 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 476 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:21,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 128 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-03-01 17:48:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 1664. [2022-03-01 17:48:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 4.055321707757066) internal successors, (6744), 1663 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 6744 transitions. [2022-03-01 17:48:21,044 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 6744 transitions. Word has length 26 [2022-03-01 17:48:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 6744 transitions. [2022-03-01 17:48:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 6744 transitions. [2022-03-01 17:48:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:21,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:21,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:21,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-01 17:48:21,263 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1949074037, now seen corresponding path program 15 times [2022-03-01 17:48:21,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:21,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309387402] [2022-03-01 17:48:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:21,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:21,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309387402] [2022-03-01 17:48:21,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309387402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:21,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333219209] [2022-03-01 17:48:21,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:21,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:21,384 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:21,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:48:21,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:21,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:21,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:21,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:21,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:21,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:48:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:21,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333219209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:21,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:21,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:48:21,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505416352] [2022-03-01 17:48:21,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:21,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:48:21,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:48:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:21,974 INFO L87 Difference]: Start difference. First operand 1664 states and 6744 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:27,568 INFO L93 Difference]: Finished difference Result 6790 states and 24964 transitions. [2022-03-01 17:48:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-01 17:48:27,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:27,581 INFO L225 Difference]: With dead ends: 6790 [2022-03-01 17:48:27,581 INFO L226 Difference]: Without dead ends: 5777 [2022-03-01 17:48:27,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7943 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3171, Invalid=17135, Unknown=0, NotChecked=0, Total=20306 [2022-03-01 17:48:27,582 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1215 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 4380 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 6125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 4380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1320 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:27,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 556 Invalid, 6125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 4380 Invalid, 0 Unknown, 1320 Unchecked, 1.5s Time] [2022-03-01 17:48:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2022-03-01 17:48:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 1845. [2022-03-01 17:48:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 4.085140997830803) internal successors, (7533), 1844 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 7533 transitions. [2022-03-01 17:48:27,629 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 7533 transitions. Word has length 26 [2022-03-01 17:48:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:27,629 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 7533 transitions. [2022-03-01 17:48:27,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 7533 transitions. [2022-03-01 17:48:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:27,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:27,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:27,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:27,848 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash -183045505, now seen corresponding path program 16 times [2022-03-01 17:48:27,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:27,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946476374] [2022-03-01 17:48:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:27,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946476374] [2022-03-01 17:48:27,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946476374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:27,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614907147] [2022-03-01 17:48:27,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:27,956 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:27,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:48:27,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:27,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:28,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:28,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:28,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:28,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:28,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:28,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-03-01 17:48:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:28,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614907147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:28,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:28,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:28,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676486915] [2022-03-01 17:48:28,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:28,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:28,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:28,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:28,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:28,315 INFO L87 Difference]: Start difference. First operand 1845 states and 7533 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:28,737 INFO L93 Difference]: Finished difference Result 2331 states and 9391 transitions. [2022-03-01 17:48:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:48:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:28,741 INFO L225 Difference]: With dead ends: 2331 [2022-03-01 17:48:28,742 INFO L226 Difference]: Without dead ends: 2251 [2022-03-01 17:48:28,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:28,742 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:28,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 83 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 992 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-03-01 17:48:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2022-03-01 17:48:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1853. [2022-03-01 17:48:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 4.091792656587473) internal successors, (7578), 1852 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 7578 transitions. [2022-03-01 17:48:28,768 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 7578 transitions. Word has length 26 [2022-03-01 17:48:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:28,768 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 7578 transitions. [2022-03-01 17:48:28,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 7578 transitions. [2022-03-01 17:48:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:28,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:28,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:28,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:48:28,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-01 17:48:28,985 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1487285999, now seen corresponding path program 21 times [2022-03-01 17:48:28,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:28,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257809322] [2022-03-01 17:48:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:29,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257809322] [2022-03-01 17:48:29,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257809322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:29,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615214572] [2022-03-01 17:48:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:29,059 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:29,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:48:29,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:29,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:29,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:29,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:29,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:48:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615214572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:29,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:29,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:48:29,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159423652] [2022-03-01 17:48:29,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:29,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:29,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:29,678 INFO L87 Difference]: Start difference. First operand 1853 states and 7578 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:35,511 INFO L93 Difference]: Finished difference Result 5428 states and 19974 transitions. [2022-03-01 17:48:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-01 17:48:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:35,521 INFO L225 Difference]: With dead ends: 5428 [2022-03-01 17:48:35,521 INFO L226 Difference]: Without dead ends: 4843 [2022-03-01 17:48:35,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5771 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2808, Invalid=12198, Unknown=0, NotChecked=0, Total=15006 [2022-03-01 17:48:35,522 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1355 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:35,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 296 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 3277 Invalid, 0 Unknown, 410 Unchecked, 1.6s Time] [2022-03-01 17:48:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2022-03-01 17:48:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 1902. [2022-03-01 17:48:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 4.085218306154656) internal successors, (7766), 1901 states have internal predecessors, (7766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 7766 transitions. [2022-03-01 17:48:35,565 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 7766 transitions. Word has length 26 [2022-03-01 17:48:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:35,565 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 7766 transitions. [2022-03-01 17:48:35,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 7766 transitions. [2022-03-01 17:48:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:35,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:35,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:35,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:35,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:35,783 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -760425878, now seen corresponding path program 25 times [2022-03-01 17:48:35,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:35,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388408536] [2022-03-01 17:48:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:35,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:35,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388408536] [2022-03-01 17:48:35,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388408536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:35,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67224545] [2022-03-01 17:48:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:35,878 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:48:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:36,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:36,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:36,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:36,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67224545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:36,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:36,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:48:36,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836838408] [2022-03-01 17:48:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:36,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:48:36,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:48:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:48:36,285 INFO L87 Difference]: Start difference. First operand 1902 states and 7766 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:36,480 INFO L93 Difference]: Finished difference Result 2308 states and 9310 transitions. [2022-03-01 17:48:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:48:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:36,485 INFO L225 Difference]: With dead ends: 2308 [2022-03-01 17:48:36,485 INFO L226 Difference]: Without dead ends: 2232 [2022-03-01 17:48:36,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:48:36,486 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:36,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 49 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 534 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-03-01 17:48:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-03-01 17:48:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1892. [2022-03-01 17:48:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 4.081967213114754) internal successors, (7719), 1891 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7719 transitions. [2022-03-01 17:48:36,512 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7719 transitions. Word has length 26 [2022-03-01 17:48:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:36,512 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 7719 transitions. [2022-03-01 17:48:36,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7719 transitions. [2022-03-01 17:48:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:36,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:36,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:36,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:36,731 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1867196842, now seen corresponding path program 26 times [2022-03-01 17:48:36,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:36,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079963749] [2022-03-01 17:48:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:36,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079963749] [2022-03-01 17:48:36,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079963749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:36,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106156875] [2022-03-01 17:48:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:36,790 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:36,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:48:36,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:36,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:36,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:36,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:48:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:37,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:37,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:48:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106156875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:37,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:37,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:37,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296702390] [2022-03-01 17:48:37,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:37,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:37,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:37,388 INFO L87 Difference]: Start difference. First operand 1892 states and 7719 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:38,147 INFO L93 Difference]: Finished difference Result 3080 states and 12618 transitions. [2022-03-01 17:48:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:48:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:38,153 INFO L225 Difference]: With dead ends: 3080 [2022-03-01 17:48:38,153 INFO L226 Difference]: Without dead ends: 2999 [2022-03-01 17:48:38,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:48:38,153 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 232 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 802 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:38,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 185 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 905 Invalid, 0 Unknown, 802 Unchecked, 0.3s Time] [2022-03-01 17:48:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-03-01 17:48:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1926. [2022-03-01 17:48:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.086233766233766) internal successors, (7866), 1925 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7866 transitions. [2022-03-01 17:48:38,187 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7866 transitions. Word has length 26 [2022-03-01 17:48:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:38,187 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7866 transitions. [2022-03-01 17:48:38,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7866 transitions. [2022-03-01 17:48:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:38,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:38,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:38,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:38,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:38,403 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1248808606, now seen corresponding path program 27 times [2022-03-01 17:48:38,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:38,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816428948] [2022-03-01 17:48:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:38,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816428948] [2022-03-01 17:48:38,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816428948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:38,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423501918] [2022-03-01 17:48:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:38,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:38,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:38,460 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:48:38,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:38,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:38,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:48:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:38,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:38,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:48:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423501918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:38,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:38,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:38,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323090364] [2022-03-01 17:48:38,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:38,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:38,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:38,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:38,997 INFO L87 Difference]: Start difference. First operand 1926 states and 7866 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:40,320 INFO L93 Difference]: Finished difference Result 3335 states and 13165 transitions. [2022-03-01 17:48:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:48:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:40,326 INFO L225 Difference]: With dead ends: 3335 [2022-03-01 17:48:40,326 INFO L226 Difference]: Without dead ends: 3145 [2022-03-01 17:48:40,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:48:40,327 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 383 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1583 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:40,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 275 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1306 Invalid, 0 Unknown, 1583 Unchecked, 0.5s Time] [2022-03-01 17:48:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-03-01 17:48:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1946. [2022-03-01 17:48:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 4.089460154241645) internal successors, (7954), 1945 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 7954 transitions. [2022-03-01 17:48:40,361 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 7954 transitions. Word has length 26 [2022-03-01 17:48:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:40,361 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 7954 transitions. [2022-03-01 17:48:40,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 7954 transitions. [2022-03-01 17:48:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:40,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:40,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:40,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:40,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 17:48:40,579 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1385586132, now seen corresponding path program 28 times [2022-03-01 17:48:40,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:40,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909300317] [2022-03-01 17:48:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:40,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909300317] [2022-03-01 17:48:40,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909300317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:40,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58605348] [2022-03-01 17:48:40,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:40,675 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:40,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:48:40,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:40,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:40,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:40,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:40,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:40,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58605348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:40,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:40,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:48:40,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334954024] [2022-03-01 17:48:40,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:40,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:40,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:40,898 INFO L87 Difference]: Start difference. First operand 1946 states and 7954 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:41,332 INFO L93 Difference]: Finished difference Result 3038 states and 12066 transitions. [2022-03-01 17:48:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:48:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:41,338 INFO L225 Difference]: With dead ends: 3038 [2022-03-01 17:48:41,338 INFO L226 Difference]: Without dead ends: 2965 [2022-03-01 17:48:41,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:41,339 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:41,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 96 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1050 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-03-01 17:48:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-03-01 17:48:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1979. [2022-03-01 17:48:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 4.0611729019211324) internal successors, (8033), 1978 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 8033 transitions. [2022-03-01 17:48:41,373 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 8033 transitions. Word has length 26 [2022-03-01 17:48:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 8033 transitions. [2022-03-01 17:48:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 8033 transitions. [2022-03-01 17:48:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:41,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:41,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:41,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:41,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,592 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2052190500, now seen corresponding path program 22 times [2022-03-01 17:48:41,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:41,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568308640] [2022-03-01 17:48:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:41,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568308640] [2022-03-01 17:48:41,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568308640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:41,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767849146] [2022-03-01 17:48:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:41,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:41,684 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:41,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:48:41,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:41,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:41,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:41,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:42,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:42,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767849146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:42,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:42,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:48:42,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018955523] [2022-03-01 17:48:42,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:42,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:42,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:42,024 INFO L87 Difference]: Start difference. First operand 1979 states and 8033 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:42,650 INFO L93 Difference]: Finished difference Result 2853 states and 11360 transitions. [2022-03-01 17:48:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:48:42,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:42,656 INFO L225 Difference]: With dead ends: 2853 [2022-03-01 17:48:42,656 INFO L226 Difference]: Without dead ends: 2780 [2022-03-01 17:48:42,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:42,656 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 191 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:42,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 124 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1232 Invalid, 0 Unknown, 192 Unchecked, 0.5s Time] [2022-03-01 17:48:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2022-03-01 17:48:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1952. [2022-03-01 17:48:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 4.071245515120451) internal successors, (7943), 1951 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 7943 transitions. [2022-03-01 17:48:42,687 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 7943 transitions. Word has length 26 [2022-03-01 17:48:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 7943 transitions. [2022-03-01 17:48:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 7943 transitions. [2022-03-01 17:48:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:42,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:42,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:42,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:42,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:42,899 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1251274198, now seen corresponding path program 29 times [2022-03-01 17:48:42,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:42,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481927898] [2022-03-01 17:48:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:42,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:42,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:42,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481927898] [2022-03-01 17:48:42,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481927898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:42,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350004542] [2022-03-01 17:48:42,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:42,973 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:42,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:48:43,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:43,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:43,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:43,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:43,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:43,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:43,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350004542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:43,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:43,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:43,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469695011] [2022-03-01 17:48:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:43,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:43,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:43,294 INFO L87 Difference]: Start difference. First operand 1952 states and 7943 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:43,774 INFO L93 Difference]: Finished difference Result 2535 states and 10195 transitions. [2022-03-01 17:48:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:43,779 INFO L225 Difference]: With dead ends: 2535 [2022-03-01 17:48:43,779 INFO L226 Difference]: Without dead ends: 2462 [2022-03-01 17:48:43,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:43,780 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 143 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:43,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 104 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 970 Invalid, 0 Unknown, 287 Unchecked, 0.4s Time] [2022-03-01 17:48:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-03-01 17:48:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1985. [2022-03-01 17:48:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 4.060483870967742) internal successors, (8056), 1984 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 8056 transitions. [2022-03-01 17:48:43,807 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 8056 transitions. Word has length 26 [2022-03-01 17:48:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:43,807 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 8056 transitions. [2022-03-01 17:48:43,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 8056 transitions. [2022-03-01 17:48:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:43,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:43,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:43,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:44,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:48:44,026 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:44,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1066280540, now seen corresponding path program 23 times [2022-03-01 17:48:44,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:44,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966305560] [2022-03-01 17:48:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:44,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:44,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:44,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966305560] [2022-03-01 17:48:44,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966305560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:44,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791809466] [2022-03-01 17:48:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:44,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:44,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:44,116 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:48:44,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:44,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:44,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:44,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:44,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:44,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:44,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791809466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:44,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:44,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:48:44,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172670053] [2022-03-01 17:48:44,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:44,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:44,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:44,486 INFO L87 Difference]: Start difference. First operand 1985 states and 8056 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:44,919 INFO L93 Difference]: Finished difference Result 2575 states and 10343 transitions. [2022-03-01 17:48:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:44,925 INFO L225 Difference]: With dead ends: 2575 [2022-03-01 17:48:44,925 INFO L226 Difference]: Without dead ends: 2486 [2022-03-01 17:48:44,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:44,925 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:44,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 103 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 871 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-03-01 17:48:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-03-01 17:48:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2018. [2022-03-01 17:48:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 4.050570153693604) internal successors, (8170), 2017 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 8170 transitions. [2022-03-01 17:48:44,953 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 8170 transitions. Word has length 26 [2022-03-01 17:48:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:44,953 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 8170 transitions. [2022-03-01 17:48:44,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 8170 transitions. [2022-03-01 17:48:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:44,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:44,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:44,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:45,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-01 17:48:45,172 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:45,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2071750068, now seen corresponding path program 30 times [2022-03-01 17:48:45,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:45,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502807248] [2022-03-01 17:48:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:45,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:45,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502807248] [2022-03-01 17:48:45,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502807248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:45,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744879989] [2022-03-01 17:48:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:45,253 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:45,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:48:45,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:45,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:45,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:48:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:45,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:45,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:48:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744879989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:45,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:45,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:45,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900473904] [2022-03-01 17:48:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:45,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:45,867 INFO L87 Difference]: Start difference. First operand 2018 states and 8170 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:46,244 INFO L93 Difference]: Finished difference Result 2645 states and 10657 transitions. [2022-03-01 17:48:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:48:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:46,250 INFO L225 Difference]: With dead ends: 2645 [2022-03-01 17:48:46,251 INFO L226 Difference]: Without dead ends: 2638 [2022-03-01 17:48:46,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:46,251 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:46,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 144 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 486 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2022-03-01 17:48:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-03-01 17:48:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2050. [2022-03-01 17:48:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 4.042947779404588) internal successors, (8284), 2049 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 8284 transitions. [2022-03-01 17:48:46,307 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 8284 transitions. Word has length 26 [2022-03-01 17:48:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:46,307 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 8284 transitions. [2022-03-01 17:48:46,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 8284 transitions. [2022-03-01 17:48:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:46,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:46,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:46,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:46,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:46,526 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2043120917, now seen corresponding path program 2 times [2022-03-01 17:48:46,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:46,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256804693] [2022-03-01 17:48:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:46,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:46,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256804693] [2022-03-01 17:48:46,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256804693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:46,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222367113] [2022-03-01 17:48:46,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:46,591 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:46,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:48:46,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:46,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:46,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:46,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:46,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-01 17:48:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:47,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:47,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:48:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222367113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:47,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:47,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:47,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472455638] [2022-03-01 17:48:47,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:47,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:47,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:47,234 INFO L87 Difference]: Start difference. First operand 2050 states and 8284 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:47,857 INFO L93 Difference]: Finished difference Result 2812 states and 11198 transitions. [2022-03-01 17:48:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:47,863 INFO L225 Difference]: With dead ends: 2812 [2022-03-01 17:48:47,863 INFO L226 Difference]: Without dead ends: 2705 [2022-03-01 17:48:47,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:47,864 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:47,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 112 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 671 Invalid, 0 Unknown, 555 Unchecked, 0.3s Time] [2022-03-01 17:48:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-01 17:48:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2025. [2022-03-01 17:48:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 4.051877470355731) internal successors, (8201), 2024 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 8201 transitions. [2022-03-01 17:48:47,894 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 8201 transitions. Word has length 26 [2022-03-01 17:48:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:47,894 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 8201 transitions. [2022-03-01 17:48:47,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 8201 transitions. [2022-03-01 17:48:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:47,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:47,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:47,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:48:48,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:48,111 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -892788220, now seen corresponding path program 31 times [2022-03-01 17:48:48,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:48,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273365073] [2022-03-01 17:48:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:48,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:48,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273365073] [2022-03-01 17:48:48,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273365073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:48,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784951302] [2022-03-01 17:48:48,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:48,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:48,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:48,182 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:48,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:48:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:48,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:48,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:48:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:48,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:48,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:48,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:48,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:48,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784951302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:48,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:48,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:48,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684346394] [2022-03-01 17:48:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:48,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:48,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:48,527 INFO L87 Difference]: Start difference. First operand 2025 states and 8201 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:49,116 INFO L93 Difference]: Finished difference Result 2724 states and 10839 transitions. [2022-03-01 17:48:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:48:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:49,122 INFO L225 Difference]: With dead ends: 2724 [2022-03-01 17:48:49,122 INFO L226 Difference]: Without dead ends: 2652 [2022-03-01 17:48:49,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:49,122 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:49,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 138 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1288 Invalid, 0 Unknown, 251 Unchecked, 0.5s Time] [2022-03-01 17:48:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-03-01 17:48:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1999. [2022-03-01 17:48:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 4.05955955955956) internal successors, (8111), 1998 states have internal predecessors, (8111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 8111 transitions. [2022-03-01 17:48:49,151 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 8111 transitions. Word has length 26 [2022-03-01 17:48:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:49,151 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 8111 transitions. [2022-03-01 17:48:49,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 8111 transitions. [2022-03-01 17:48:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:49,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:49,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:49,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:49,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-01 17:48:49,371 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1028805654, now seen corresponding path program 32 times [2022-03-01 17:48:49,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:49,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609695317] [2022-03-01 17:48:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:49,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609695317] [2022-03-01 17:48:49,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609695317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:49,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686077583] [2022-03-01 17:48:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:49,435 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:49,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:48:49,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:49,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:49,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:49,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:49,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:49,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:49,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:48:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686077583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:49,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:49,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:48:49,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756525405] [2022-03-01 17:48:49,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:49,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:49,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:49,917 INFO L87 Difference]: Start difference. First operand 1999 states and 8111 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:50,489 INFO L93 Difference]: Finished difference Result 2689 states and 10784 transitions. [2022-03-01 17:48:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:48:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:50,495 INFO L225 Difference]: With dead ends: 2689 [2022-03-01 17:48:50,495 INFO L226 Difference]: Without dead ends: 2624 [2022-03-01 17:48:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:50,495 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 223 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 122 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 916 Invalid, 0 Unknown, 922 Unchecked, 0.3s Time] [2022-03-01 17:48:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2022-03-01 17:48:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2008. [2022-03-01 17:48:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 4.061783756851021) internal successors, (8152), 2007 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 8152 transitions. [2022-03-01 17:48:50,526 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 8152 transitions. Word has length 26 [2022-03-01 17:48:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:50,526 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 8152 transitions. [2022-03-01 17:48:50,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 8152 transitions. [2022-03-01 17:48:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:50,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:50,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:50,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:50,755 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash 150156194, now seen corresponding path program 33 times [2022-03-01 17:48:50,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:50,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130205740] [2022-03-01 17:48:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:50,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:50,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130205740] [2022-03-01 17:48:50,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130205740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:50,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557612707] [2022-03-01 17:48:50,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:50,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:50,811 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:50,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:48:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:50,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:50,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:50,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:51,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:51,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-01 17:48:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557612707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:51,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:51,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:51,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229250911] [2022-03-01 17:48:51,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:51,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:51,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:51,181 INFO L87 Difference]: Start difference. First operand 2008 states and 8152 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:51,645 INFO L93 Difference]: Finished difference Result 2729 states and 10920 transitions. [2022-03-01 17:48:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:48:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:51,651 INFO L225 Difference]: With dead ends: 2729 [2022-03-01 17:48:51,651 INFO L226 Difference]: Without dead ends: 2664 [2022-03-01 17:48:51,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:48:51,651 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:51,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 130 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 810 Invalid, 0 Unknown, 466 Unchecked, 0.2s Time] [2022-03-01 17:48:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-03-01 17:48:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2007. [2022-03-01 17:48:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.062313060817547) internal successors, (8149), 2006 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8149 transitions. [2022-03-01 17:48:51,681 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8149 transitions. Word has length 26 [2022-03-01 17:48:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:51,681 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8149 transitions. [2022-03-01 17:48:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8149 transitions. [2022-03-01 17:48:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:51,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:51,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:51,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:51,900 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 939524812, now seen corresponding path program 34 times [2022-03-01 17:48:51,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:51,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991021836] [2022-03-01 17:48:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:51,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991021836] [2022-03-01 17:48:51,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991021836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:51,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578582150] [2022-03-01 17:48:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:51,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:51,955 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:51,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:48:51,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:51,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:52,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:52,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:52,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:52,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:52,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578582150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:52,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:52,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:52,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860322388] [2022-03-01 17:48:52,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:52,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:52,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:52,203 INFO L87 Difference]: Start difference. First operand 2007 states and 8149 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:52,492 INFO L93 Difference]: Finished difference Result 2500 states and 10081 transitions. [2022-03-01 17:48:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:48:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:52,497 INFO L225 Difference]: With dead ends: 2500 [2022-03-01 17:48:52,497 INFO L226 Difference]: Without dead ends: 2419 [2022-03-01 17:48:52,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:52,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:52,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 89 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 812 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-03-01 17:48:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2022-03-01 17:48:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2019. [2022-03-01 17:48:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 4.0599603567889) internal successors, (8193), 2018 states have internal predecessors, (8193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 8193 transitions. [2022-03-01 17:48:52,538 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 8193 transitions. Word has length 26 [2022-03-01 17:48:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 8193 transitions. [2022-03-01 17:48:52,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 8193 transitions. [2022-03-01 17:48:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:52,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:52,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:52,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:52,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-01 17:48:52,758 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2113511108, now seen corresponding path program 35 times [2022-03-01 17:48:52,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:52,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242366959] [2022-03-01 17:48:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:52,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:52,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242366959] [2022-03-01 17:48:52,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242366959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:52,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048751180] [2022-03-01 17:48:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:52,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:52,812 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:52,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:48:52,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:52,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:52,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:52,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:52,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:53,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:53,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:53,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:53,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:53,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048751180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:53,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:53,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:53,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845198031] [2022-03-01 17:48:53,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:53,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:53,054 INFO L87 Difference]: Start difference. First operand 2019 states and 8193 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:53,379 INFO L93 Difference]: Finished difference Result 2511 states and 10079 transitions. [2022-03-01 17:48:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:48:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:53,384 INFO L225 Difference]: With dead ends: 2511 [2022-03-01 17:48:53,384 INFO L226 Difference]: Without dead ends: 2444 [2022-03-01 17:48:53,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:53,384 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:53,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 121 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1100 Invalid, 0 Unknown, 249 Unchecked, 0.3s Time] [2022-03-01 17:48:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-03-01 17:48:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2011. [2022-03-01 17:48:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 4.057213930348259) internal successors, (8155), 2010 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 8155 transitions. [2022-03-01 17:48:53,412 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 8155 transitions. Word has length 26 [2022-03-01 17:48:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:53,412 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 8155 transitions. [2022-03-01 17:48:53,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 8155 transitions. [2022-03-01 17:48:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:53,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:53,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:53,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:53,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:53,628 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1284605652, now seen corresponding path program 36 times [2022-03-01 17:48:53,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:53,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147288078] [2022-03-01 17:48:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:53,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:53,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147288078] [2022-03-01 17:48:53,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147288078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:53,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534312514] [2022-03-01 17:48:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:53,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:53,698 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:53,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:48:53,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:53,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:53,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:53,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:53,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:53,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:54,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:54,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:54,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-01 17:48:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:54,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534312514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:54,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:54,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:54,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100272325] [2022-03-01 17:48:54,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:54,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:54,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:54,325 INFO L87 Difference]: Start difference. First operand 2011 states and 8155 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:55,043 INFO L93 Difference]: Finished difference Result 2921 states and 11580 transitions. [2022-03-01 17:48:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:48:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:55,049 INFO L225 Difference]: With dead ends: 2921 [2022-03-01 17:48:55,049 INFO L226 Difference]: Without dead ends: 2850 [2022-03-01 17:48:55,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:48:55,050 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 258 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:55,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 158 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 995 Invalid, 0 Unknown, 674 Unchecked, 0.3s Time] [2022-03-01 17:48:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-03-01 17:48:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2023. [2022-03-01 17:48:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 4.053412462908012) internal successors, (8196), 2022 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 8196 transitions. [2022-03-01 17:48:55,080 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 8196 transitions. Word has length 26 [2022-03-01 17:48:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:55,080 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 8196 transitions. [2022-03-01 17:48:55,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 8196 transitions. [2022-03-01 17:48:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:55,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:55,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:55,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:48:55,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:48:55,299 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1175252474, now seen corresponding path program 24 times [2022-03-01 17:48:55,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:55,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266887539] [2022-03-01 17:48:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:55,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266887539] [2022-03-01 17:48:55,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266887539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:55,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107748225] [2022-03-01 17:48:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:55,347 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:55,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:48:55,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:55,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:55,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:55,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:55,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:55,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-01 17:48:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107748225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:55,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:55,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:55,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126883813] [2022-03-01 17:48:55,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:55,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:55,709 INFO L87 Difference]: Start difference. First operand 2023 states and 8196 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:56,382 INFO L93 Difference]: Finished difference Result 3004 states and 11791 transitions. [2022-03-01 17:48:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:48:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:56,388 INFO L225 Difference]: With dead ends: 3004 [2022-03-01 17:48:56,388 INFO L226 Difference]: Without dead ends: 2920 [2022-03-01 17:48:56,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:48:56,389 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:56,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 183 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1144 Invalid, 0 Unknown, 851 Unchecked, 0.3s Time] [2022-03-01 17:48:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2022-03-01 17:48:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2029. [2022-03-01 17:48:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 4.054240631163708) internal successors, (8222), 2028 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 8222 transitions. [2022-03-01 17:48:56,438 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 8222 transitions. Word has length 26 [2022-03-01 17:48:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:56,438 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 8222 transitions. [2022-03-01 17:48:56,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 8222 transitions. [2022-03-01 17:48:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:56,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:56,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:56,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:48:56,657 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -372713892, now seen corresponding path program 25 times [2022-03-01 17:48:56,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:56,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741690039] [2022-03-01 17:48:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:56,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:56,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741690039] [2022-03-01 17:48:56,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741690039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:56,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050870621] [2022-03-01 17:48:56,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:56,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:56,727 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:56,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:48:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:56,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:56,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:56,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:56,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:57,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:57,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:57,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050870621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:57,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:57,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:57,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747994949] [2022-03-01 17:48:57,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:57,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:57,086 INFO L87 Difference]: Start difference. First operand 2029 states and 8222 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:57,636 INFO L93 Difference]: Finished difference Result 2526 states and 10154 transitions. [2022-03-01 17:48:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:48:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:57,641 INFO L225 Difference]: With dead ends: 2526 [2022-03-01 17:48:57,641 INFO L226 Difference]: Without dead ends: 2451 [2022-03-01 17:48:57,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:57,642 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:57,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 103 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1032 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-03-01 17:48:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-03-01 17:48:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2024. [2022-03-01 17:48:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 4.052891744933268) internal successors, (8199), 2023 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 8199 transitions. [2022-03-01 17:48:57,673 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 8199 transitions. Word has length 26 [2022-03-01 17:48:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 8199 transitions. [2022-03-01 17:48:57,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 8199 transitions. [2022-03-01 17:48:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:57,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:57,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:57,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:57,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:48:57,876 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1599805662, now seen corresponding path program 26 times [2022-03-01 17:48:57,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:57,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337347311] [2022-03-01 17:48:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:57,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337347311] [2022-03-01 17:48:57,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337347311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:57,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538701477] [2022-03-01 17:48:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:57,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:57,950 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:57,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:48:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:48:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:58,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:48:58,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:48:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:58,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:58,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:58,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:48:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:58,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:48:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:58,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538701477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:58,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:58,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:48:58,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483121240] [2022-03-01 17:48:58,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:58,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:48:58,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:48:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:48:58,251 INFO L87 Difference]: Start difference. First operand 2024 states and 8199 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:58,691 INFO L93 Difference]: Finished difference Result 2509 states and 10087 transitions. [2022-03-01 17:48:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:48:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:48:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:58,696 INFO L225 Difference]: With dead ends: 2509 [2022-03-01 17:48:58,696 INFO L226 Difference]: Without dead ends: 2434 [2022-03-01 17:48:58,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:48:58,696 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 173 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:58,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 84 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 829 Invalid, 0 Unknown, 201 Unchecked, 0.3s Time] [2022-03-01 17:48:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-03-01 17:48:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2021. [2022-03-01 17:48:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 4.054950495049505) internal successors, (8191), 2020 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 8191 transitions. [2022-03-01 17:48:58,736 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 8191 transitions. Word has length 26 [2022-03-01 17:48:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 8191 transitions. [2022-03-01 17:48:58,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 8191 transitions. [2022-03-01 17:48:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:48:58,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:58,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:58,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:48:58,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:58,960 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 526936228, now seen corresponding path program 27 times [2022-03-01 17:48:58,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:58,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978689417] [2022-03-01 17:48:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:59,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978689417] [2022-03-01 17:48:59,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978689417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:59,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367525490] [2022-03-01 17:48:59,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:59,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:59,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:59,032 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:59,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:48:59,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:59,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:48:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:59,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:59,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:48:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:59,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:59,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-01 17:48:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367525490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:59,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:59,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:48:59,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632675499] [2022-03-01 17:48:59,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:59,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:59,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:59,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:59,568 INFO L87 Difference]: Start difference. First operand 2021 states and 8191 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:00,312 INFO L93 Difference]: Finished difference Result 2971 states and 11623 transitions. [2022-03-01 17:49:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:49:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:00,318 INFO L225 Difference]: With dead ends: 2971 [2022-03-01 17:49:00,318 INFO L226 Difference]: Without dead ends: 2894 [2022-03-01 17:49:00,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:49:00,318 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 358 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1004 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:00,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 189 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1355 Invalid, 0 Unknown, 1004 Unchecked, 0.4s Time] [2022-03-01 17:49:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2022-03-01 17:49:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2022. [2022-03-01 17:49:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 4.052944087085601) internal successors, (8191), 2021 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 8191 transitions. [2022-03-01 17:49:00,349 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 8191 transitions. Word has length 26 [2022-03-01 17:49:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:00,349 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 8191 transitions. [2022-03-01 17:49:00,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 8191 transitions. [2022-03-01 17:49:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:00,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:00,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:00,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:00,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 17:49:00,568 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash -256871460, now seen corresponding path program 37 times [2022-03-01 17:49:00,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:00,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185247267] [2022-03-01 17:49:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:00,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:00,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185247267] [2022-03-01 17:49:00,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185247267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:00,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561915083] [2022-03-01 17:49:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:00,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:00,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:00,635 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:00,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:49:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:00,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:49:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:00,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:00,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:00,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:00,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:00,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:00,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561915083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:00,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:00,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:49:00,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98526829] [2022-03-01 17:49:00,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:00,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:00,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:00,866 INFO L87 Difference]: Start difference. First operand 2022 states and 8191 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:01,305 INFO L93 Difference]: Finished difference Result 2572 states and 10313 transitions. [2022-03-01 17:49:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:01,311 INFO L225 Difference]: With dead ends: 2572 [2022-03-01 17:49:01,311 INFO L226 Difference]: Without dead ends: 2493 [2022-03-01 17:49:01,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:01,311 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:01,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 95 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1178 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-03-01 17:49:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-03-01 17:49:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2005. [2022-03-01 17:49:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 4.058383233532934) internal successors, (8133), 2004 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 8133 transitions. [2022-03-01 17:49:01,340 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 8133 transitions. Word has length 26 [2022-03-01 17:49:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:01,340 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 8133 transitions. [2022-03-01 17:49:01,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 8133 transitions. [2022-03-01 17:49:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:01,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:01,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:01,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:49:01,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:49:01,559 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2068209292, now seen corresponding path program 28 times [2022-03-01 17:49:01,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:01,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192149218] [2022-03-01 17:49:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:01,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192149218] [2022-03-01 17:49:01,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192149218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:01,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752880786] [2022-03-01 17:49:01,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:01,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:01,620 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:01,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:49:01,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:01,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:49:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:01,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:01,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:01,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752880786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:01,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:01,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:49:01,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064733386] [2022-03-01 17:49:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:01,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:01,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:01,917 INFO L87 Difference]: Start difference. First operand 2005 states and 8133 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:02,303 INFO L93 Difference]: Finished difference Result 2465 states and 9901 transitions. [2022-03-01 17:49:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:49:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:02,308 INFO L225 Difference]: With dead ends: 2465 [2022-03-01 17:49:02,308 INFO L226 Difference]: Without dead ends: 2417 [2022-03-01 17:49:02,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:02,309 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:02,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 101 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1146 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-03-01 17:49:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-03-01 17:49:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1993. [2022-03-01 17:49:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 4.06074297188755) internal successors, (8089), 1992 states have internal predecessors, (8089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 8089 transitions. [2022-03-01 17:49:02,339 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 8089 transitions. Word has length 26 [2022-03-01 17:49:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:02,339 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 8089 transitions. [2022-03-01 17:49:02,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 8089 transitions. [2022-03-01 17:49:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:02,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:02,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:02,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:02,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 17:49:02,558 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1623999605, now seen corresponding path program 22 times [2022-03-01 17:49:02,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:02,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111689664] [2022-03-01 17:49:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:02,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111689664] [2022-03-01 17:49:02,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111689664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:02,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803197261] [2022-03-01 17:49:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:02,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:02,614 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:02,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:49:02,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:02,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:02,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:49:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:02,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:02,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:02,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803197261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:02,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:02,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:49:02,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406995014] [2022-03-01 17:49:02,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:02,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:02,898 INFO L87 Difference]: Start difference. First operand 1993 states and 8089 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:03,225 INFO L93 Difference]: Finished difference Result 3145 states and 12499 transitions. [2022-03-01 17:49:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:49:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:03,232 INFO L225 Difference]: With dead ends: 3145 [2022-03-01 17:49:03,232 INFO L226 Difference]: Without dead ends: 3063 [2022-03-01 17:49:03,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:03,233 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:03,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 131 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 908 Invalid, 0 Unknown, 418 Unchecked, 0.3s Time] [2022-03-01 17:49:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2022-03-01 17:49:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2026. [2022-03-01 17:49:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 4.042962962962963) internal successors, (8187), 2025 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 8187 transitions. [2022-03-01 17:49:03,268 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 8187 transitions. Word has length 26 [2022-03-01 17:49:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:03,268 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 8187 transitions. [2022-03-01 17:49:03,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 8187 transitions. [2022-03-01 17:49:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:03,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:03,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:03,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:03,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:03,487 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1439005947, now seen corresponding path program 17 times [2022-03-01 17:49:03,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:03,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487090123] [2022-03-01 17:49:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:03,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:03,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487090123] [2022-03-01 17:49:03,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487090123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:03,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345867384] [2022-03-01 17:49:03,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:03,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:03,574 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:03,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:49:03,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:49:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:03,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:03,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:49:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:03,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:03,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:03,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-01 17:49:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:03,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345867384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:03,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:03,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:49:03,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442430525] [2022-03-01 17:49:03,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:03,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:03,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:03,941 INFO L87 Difference]: Start difference. First operand 2026 states and 8187 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:04,672 INFO L93 Difference]: Finished difference Result 4071 states and 15671 transitions. [2022-03-01 17:49:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:49:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:04,681 INFO L225 Difference]: With dead ends: 4071 [2022-03-01 17:49:04,681 INFO L226 Difference]: Without dead ends: 3938 [2022-03-01 17:49:04,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:49:04,681 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 359 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:04,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 165 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1459 Invalid, 0 Unknown, 596 Unchecked, 0.4s Time] [2022-03-01 17:49:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2022-03-01 17:49:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 2005. [2022-03-01 17:49:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 4.056387225548902) internal successors, (8129), 2004 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 8129 transitions. [2022-03-01 17:49:04,719 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 8129 transitions. Word has length 26 [2022-03-01 17:49:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:04,719 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 8129 transitions. [2022-03-01 17:49:04,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 8129 transitions. [2022-03-01 17:49:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:04,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:04,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:04,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-01 17:49:04,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:04,938 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -142302385, now seen corresponding path program 23 times [2022-03-01 17:49:04,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:04,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899584680] [2022-03-01 17:49:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:05,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899584680] [2022-03-01 17:49:05,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899584680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:05,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264355455] [2022-03-01 17:49:05,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:05,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:05,025 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:05,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:49:05,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:05,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:05,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:05,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:49:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:05,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:05,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:05,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264355455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:05,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:05,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:49:05,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168192004] [2022-03-01 17:49:05,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:05,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:05,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:05,343 INFO L87 Difference]: Start difference. First operand 2005 states and 8129 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:05,657 INFO L93 Difference]: Finished difference Result 2691 states and 10788 transitions. [2022-03-01 17:49:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:05,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:05,662 INFO L225 Difference]: With dead ends: 2691 [2022-03-01 17:49:05,662 INFO L226 Difference]: Without dead ends: 2609 [2022-03-01 17:49:05,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:05,663 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:05,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 114 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-03-01 17:49:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-03-01 17:49:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2020. [2022-03-01 17:49:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 4.053491827637444) internal successors, (8184), 2019 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 8184 transitions. [2022-03-01 17:49:05,693 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 8184 transitions. Word has length 26 [2022-03-01 17:49:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:05,693 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 8184 transitions. [2022-03-01 17:49:05,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 8184 transitions. [2022-03-01 17:49:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:05,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:05,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:05,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,912 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 42691273, now seen corresponding path program 18 times [2022-03-01 17:49:05,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:05,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40533059] [2022-03-01 17:49:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:05,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40533059] [2022-03-01 17:49:05,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40533059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:05,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605029984] [2022-03-01 17:49:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:05,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:05,970 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:05,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:49:06,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:49:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:49:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:06,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:06,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:49:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:06,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:49:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605029984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:06,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:06,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:49:06,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401964163] [2022-03-01 17:49:06,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:06,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:06,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:06,507 INFO L87 Difference]: Start difference. First operand 2020 states and 8184 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:08,246 INFO L93 Difference]: Finished difference Result 4333 states and 17147 transitions. [2022-03-01 17:49:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:49:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:08,256 INFO L225 Difference]: With dead ends: 4333 [2022-03-01 17:49:08,257 INFO L226 Difference]: Without dead ends: 4096 [2022-03-01 17:49:08,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=3557, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:49:08,257 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 605 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1474 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:08,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 191 Invalid, 3213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1604 Invalid, 0 Unknown, 1474 Unchecked, 0.6s Time] [2022-03-01 17:49:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2022-03-01 17:49:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 2058. [2022-03-01 17:49:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 4.040836169178415) internal successors, (8312), 2057 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 8312 transitions. [2022-03-01 17:49:08,299 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 8312 transitions. Word has length 26 [2022-03-01 17:49:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:08,299 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 8312 transitions. [2022-03-01 17:49:08,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 8312 transitions. [2022-03-01 17:49:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:08,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:08,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:08,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:08,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:49:08,510 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -309581923, now seen corresponding path program 24 times [2022-03-01 17:49:08,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:08,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853343547] [2022-03-01 17:49:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:08,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:08,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853343547] [2022-03-01 17:49:08,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853343547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:08,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050026550] [2022-03-01 17:49:08,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:08,652 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:08,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:49:08,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:08,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:08,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:08,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:49:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:09,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:09,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:49:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:09,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050026550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:09,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:09,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:49:09,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767527196] [2022-03-01 17:49:09,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:09,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:09,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:09,081 INFO L87 Difference]: Start difference. First operand 2058 states and 8312 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:10,115 INFO L93 Difference]: Finished difference Result 2833 states and 11324 transitions. [2022-03-01 17:49:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:10,121 INFO L225 Difference]: With dead ends: 2833 [2022-03-01 17:49:10,121 INFO L226 Difference]: Without dead ends: 2733 [2022-03-01 17:49:10,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:49:10,122 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:10,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 108 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-03-01 17:49:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2067. [2022-03-01 17:49:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 4.040174249757986) internal successors, (8347), 2066 states have internal predecessors, (8347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 8347 transitions. [2022-03-01 17:49:10,152 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 8347 transitions. Word has length 26 [2022-03-01 17:49:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:10,152 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 8347 transitions. [2022-03-01 17:49:10,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 8347 transitions. [2022-03-01 17:49:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:10,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:10,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:10,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:10,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:49:10,370 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1922060491, now seen corresponding path program 25 times [2022-03-01 17:49:10,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:10,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085614137] [2022-03-01 17:49:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:10,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085614137] [2022-03-01 17:49:10,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085614137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:10,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157273720] [2022-03-01 17:49:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:10,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:10,451 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:10,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:49:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:10,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:10,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:49:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:10,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:10,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:10,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157273720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:10,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:10,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:49:10,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892309886] [2022-03-01 17:49:10,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:10,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:10,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:10,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:10,744 INFO L87 Difference]: Start difference. First operand 2067 states and 8347 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:11,283 INFO L93 Difference]: Finished difference Result 2731 states and 10934 transitions. [2022-03-01 17:49:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:11,289 INFO L225 Difference]: With dead ends: 2731 [2022-03-01 17:49:11,289 INFO L226 Difference]: Without dead ends: 2649 [2022-03-01 17:49:11,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:11,289 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:11,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 110 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1044 Invalid, 0 Unknown, 208 Unchecked, 0.4s Time] [2022-03-01 17:49:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-03-01 17:49:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2070. [2022-03-01 17:49:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 4.039149347510874) internal successors, (8357), 2069 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 8357 transitions. [2022-03-01 17:49:11,344 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 8357 transitions. Word has length 26 [2022-03-01 17:49:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:11,344 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 8357 transitions. [2022-03-01 17:49:11,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 8357 transitions. [2022-03-01 17:49:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:11,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:11,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:11,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:49:11,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:49:11,562 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1515795553, now seen corresponding path program 19 times [2022-03-01 17:49:11,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:11,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456891116] [2022-03-01 17:49:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:11,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:11,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:11,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456891116] [2022-03-01 17:49:11,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456891116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:11,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125928294] [2022-03-01 17:49:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:11,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:11,664 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:49:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:11,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:11,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:49:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:11,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:12,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:12,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:12,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:12,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125928294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:12,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:12,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-01 17:49:12,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214396093] [2022-03-01 17:49:12,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:49:12,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:49:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:12,031 INFO L87 Difference]: Start difference. First operand 2070 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:12,593 INFO L93 Difference]: Finished difference Result 2678 states and 10756 transitions. [2022-03-01 17:49:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:49:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:12,598 INFO L225 Difference]: With dead ends: 2678 [2022-03-01 17:49:12,598 INFO L226 Difference]: Without dead ends: 2596 [2022-03-01 17:49:12,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:12,599 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 166 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:12,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1020 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2022-03-01 17:49:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-03-01 17:49:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2072. [2022-03-01 17:49:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 4.040560115886046) internal successors, (8368), 2071 states have internal predecessors, (8368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 8368 transitions. [2022-03-01 17:49:12,632 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 8368 transitions. Word has length 26 [2022-03-01 17:49:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:12,633 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 8368 transitions. [2022-03-01 17:49:12,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 8368 transitions. [2022-03-01 17:49:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:12,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:12,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:12,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:49:12,857 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1013143211, now seen corresponding path program 20 times [2022-03-01 17:49:12,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:12,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891889019] [2022-03-01 17:49:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:12,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:12,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891889019] [2022-03-01 17:49:12,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891889019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:12,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846154473] [2022-03-01 17:49:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:12,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:12,975 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:49:13,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:13,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:49:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:13,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:13,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:49:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:13,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:13,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 17:49:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:13,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846154473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:13,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:13,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 17:49:13,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181467558] [2022-03-01 17:49:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:13,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:49:13,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:49:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:13,466 INFO L87 Difference]: Start difference. First operand 2072 states and 8368 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:15,182 INFO L93 Difference]: Finished difference Result 4517 states and 17120 transitions. [2022-03-01 17:49:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:49:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:15,191 INFO L225 Difference]: With dead ends: 4517 [2022-03-01 17:49:15,191 INFO L226 Difference]: Without dead ends: 4008 [2022-03-01 17:49:15,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=637, Invalid=2555, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:49:15,192 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 751 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:15,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 232 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:49:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-03-01 17:49:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2099. [2022-03-01 17:49:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 4.048141086749285) internal successors, (8493), 2098 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 8493 transitions. [2022-03-01 17:49:15,233 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 8493 transitions. Word has length 26 [2022-03-01 17:49:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:15,233 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 8493 transitions. [2022-03-01 17:49:15,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 8493 transitions. [2022-03-01 17:49:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:15,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:15,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:15,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:15,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-01 17:49:15,452 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -615117553, now seen corresponding path program 26 times [2022-03-01 17:49:15,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:15,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772913677] [2022-03-01 17:49:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:15,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772913677] [2022-03-01 17:49:15,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772913677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:15,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879145404] [2022-03-01 17:49:15,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:15,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:15,503 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:15,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:49:15,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:49:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:15,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:15,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:49:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:15,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-03-01 17:49:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879145404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:15,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:15,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-01 17:49:15,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247447520] [2022-03-01 17:49:15,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:15,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:49:15,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:15,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:49:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:49:15,964 INFO L87 Difference]: Start difference. First operand 2099 states and 8493 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:16,589 INFO L93 Difference]: Finished difference Result 2814 states and 11290 transitions. [2022-03-01 17:49:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:49:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:16,595 INFO L225 Difference]: With dead ends: 2814 [2022-03-01 17:49:16,595 INFO L226 Difference]: Without dead ends: 2740 [2022-03-01 17:49:16,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:16,595 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:16,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 115 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2022-03-01 17:49:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2087. [2022-03-01 17:49:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 4.049856184084372) internal successors, (8448), 2086 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 8448 transitions. [2022-03-01 17:49:16,628 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 8448 transitions. Word has length 26 [2022-03-01 17:49:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:16,628 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 8448 transitions. [2022-03-01 17:49:16,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 8448 transitions. [2022-03-01 17:49:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:49:16,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:16,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:16,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:16,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-01 17:49:16,847 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -284428362, now seen corresponding path program 29 times [2022-03-01 17:49:16,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:16,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163798088] [2022-03-01 17:49:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:16,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:16,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163798088] [2022-03-01 17:49:16,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163798088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:16,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139356913] [2022-03-01 17:49:16,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:16,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:16,902 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:16,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:49:16,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:16,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:49:16,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:17,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:17,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:49:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:17,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:17,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:49:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:17,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:49:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139356913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:17,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:17,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:49:17,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653467119] [2022-03-01 17:49:17,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:17,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:49:17,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:49:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:17,258 INFO L87 Difference]: Start difference. First operand 2087 states and 8448 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:17,693 INFO L93 Difference]: Finished difference Result 2621 states and 10513 transitions. [2022-03-01 17:49:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:49:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:17,699 INFO L225 Difference]: With dead ends: 2621 [2022-03-01 17:49:17,699 INFO L226 Difference]: Without dead ends: 2548 [2022-03-01 17:49:17,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:17,699 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:17,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 102 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1033 Invalid, 0 Unknown, 209 Unchecked, 0.3s Time] [2022-03-01 17:49:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-03-01 17:49:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2049. [2022-03-01 17:49:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 4.060546875) internal successors, (8316), 2048 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 8316 transitions. [2022-03-01 17:49:17,751 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 8316 transitions. Word has length 26 [2022-03-01 17:49:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:17,751 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 8316 transitions. [2022-03-01 17:49:17,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 8316 transitions. [2022-03-01 17:49:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:17,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:17,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:17,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:17,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,967 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash 282474896, now seen corresponding path program 38 times [2022-03-01 17:49:17,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:17,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600561214] [2022-03-01 17:49:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:17,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600561214] [2022-03-01 17:49:17,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600561214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:17,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851244664] [2022-03-01 17:49:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:17,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:17,985 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:49:18,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:18,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851244664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:18,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:18,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:18,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482264977] [2022-03-01 17:49:18,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:18,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:18,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:18,087 INFO L87 Difference]: Start difference. First operand 2049 states and 8316 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:18,329 INFO L93 Difference]: Finished difference Result 4488 states and 17097 transitions. [2022-03-01 17:49:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:49:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:18,338 INFO L225 Difference]: With dead ends: 4488 [2022-03-01 17:49:18,338 INFO L226 Difference]: Without dead ends: 4287 [2022-03-01 17:49:18,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:18,338 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:18,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 236 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2022-03-01 17:49:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 2487. [2022-03-01 17:49:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 4.130329847144006) internal successors, (10268), 2486 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 10268 transitions. [2022-03-01 17:49:18,381 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 10268 transitions. Word has length 28 [2022-03-01 17:49:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 10268 transitions. [2022-03-01 17:49:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 10268 transitions. [2022-03-01 17:49:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:18,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:18,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:18,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:18,600 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2029087123, now seen corresponding path program 39 times [2022-03-01 17:49:18,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:18,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705095652] [2022-03-01 17:49:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:18,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705095652] [2022-03-01 17:49:18,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705095652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:18,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006769784] [2022-03-01 17:49:18,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:18,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:18,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:18,617 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:18,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:49:18,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006769784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:18,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:18,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:18,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426025175] [2022-03-01 17:49:18,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:18,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:18,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:18,718 INFO L87 Difference]: Start difference. First operand 2487 states and 10268 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:18,923 INFO L93 Difference]: Finished difference Result 4535 states and 17654 transitions. [2022-03-01 17:49:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:49:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:18,933 INFO L225 Difference]: With dead ends: 4535 [2022-03-01 17:49:18,933 INFO L226 Difference]: Without dead ends: 4239 [2022-03-01 17:49:18,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:18,933 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:18,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-03-01 17:49:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 2661. [2022-03-01 17:49:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.141353383458647) internal successors, (11016), 2660 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11016 transitions. [2022-03-01 17:49:18,983 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11016 transitions. Word has length 28 [2022-03-01 17:49:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 11016 transitions. [2022-03-01 17:49:18,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11016 transitions. [2022-03-01 17:49:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:18,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:18,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:19,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:19,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,203 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1294440930, now seen corresponding path program 40 times [2022-03-01 17:49:19,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:19,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508010261] [2022-03-01 17:49:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:19,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508010261] [2022-03-01 17:49:19,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508010261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:19,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121414597] [2022-03-01 17:49:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:19,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:19,217 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:19,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:49:19,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:19,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121414597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:19,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:19,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:19,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314383464] [2022-03-01 17:49:19,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:19,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:19,311 INFO L87 Difference]: Start difference. First operand 2661 states and 11016 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:19,490 INFO L93 Difference]: Finished difference Result 4469 states and 17528 transitions. [2022-03-01 17:49:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:19,500 INFO L225 Difference]: With dead ends: 4469 [2022-03-01 17:49:19,500 INFO L226 Difference]: Without dead ends: 4217 [2022-03-01 17:49:19,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:49:19,500 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 248 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:19,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 154 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2022-03-01 17:49:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2991. [2022-03-01 17:49:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 4.197658862876255) internal successors, (12551), 2990 states have internal predecessors, (12551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 12551 transitions. [2022-03-01 17:49:19,556 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 12551 transitions. Word has length 28 [2022-03-01 17:49:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:19,556 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 12551 transitions. [2022-03-01 17:49:19,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 12551 transitions. [2022-03-01 17:49:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:19,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:19,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:19,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:19,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,775 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1282810327, now seen corresponding path program 41 times [2022-03-01 17:49:19,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:19,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537953788] [2022-03-01 17:49:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:19,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537953788] [2022-03-01 17:49:19,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537953788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:19,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329290562] [2022-03-01 17:49:19,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:19,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:19,801 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:19,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:49:19,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:49:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:19,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329290562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:19,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:19,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:19,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460108700] [2022-03-01 17:49:19,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:19,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:19,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:19,946 INFO L87 Difference]: Start difference. First operand 2991 states and 12551 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:20,303 INFO L93 Difference]: Finished difference Result 4487 states and 17874 transitions. [2022-03-01 17:49:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:20,313 INFO L225 Difference]: With dead ends: 4487 [2022-03-01 17:49:20,313 INFO L226 Difference]: Without dead ends: 4408 [2022-03-01 17:49:20,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:20,313 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:20,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 263 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2022-03-01 17:49:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 2986. [2022-03-01 17:49:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.19463986599665) internal successors, (12521), 2985 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 12521 transitions. [2022-03-01 17:49:20,367 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 12521 transitions. Word has length 28 [2022-03-01 17:49:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:20,367 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 12521 transitions. [2022-03-01 17:49:20,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 12521 transitions. [2022-03-01 17:49:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:20,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:20,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:20,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-01 17:49:20,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:20,587 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2050841373, now seen corresponding path program 42 times [2022-03-01 17:49:20,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:20,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634348257] [2022-03-01 17:49:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:20,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634348257] [2022-03-01 17:49:20,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634348257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:20,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324219363] [2022-03-01 17:49:20,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:20,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:20,612 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:49:20,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:20,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324219363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:20,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:20,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:20,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309242655] [2022-03-01 17:49:20,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:20,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:20,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:20,769 INFO L87 Difference]: Start difference. First operand 2986 states and 12521 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:21,065 INFO L93 Difference]: Finished difference Result 6479 states and 25642 transitions. [2022-03-01 17:49:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:21,080 INFO L225 Difference]: With dead ends: 6479 [2022-03-01 17:49:21,080 INFO L226 Difference]: Without dead ends: 6271 [2022-03-01 17:49:21,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:21,081 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 372 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:21,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 176 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-03-01 17:49:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 3418. [2022-03-01 17:49:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 4.282996780801873) internal successors, (14635), 3417 states have internal predecessors, (14635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 14635 transitions. [2022-03-01 17:49:21,187 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 14635 transitions. Word has length 28 [2022-03-01 17:49:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:21,187 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 14635 transitions. [2022-03-01 17:49:21,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 14635 transitions. [2022-03-01 17:49:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:21,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:21,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:21,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:21,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:21,411 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1361257656, now seen corresponding path program 43 times [2022-03-01 17:49:21,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:21,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101276634] [2022-03-01 17:49:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:21,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:21,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101276634] [2022-03-01 17:49:21,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101276634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:21,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289478995] [2022-03-01 17:49:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:21,438 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:21,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:49:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:21,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289478995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:21,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:21,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:21,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029398247] [2022-03-01 17:49:21,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:21,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:21,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:21,537 INFO L87 Difference]: Start difference. First operand 3418 states and 14635 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:21,717 INFO L93 Difference]: Finished difference Result 4773 states and 19438 transitions. [2022-03-01 17:49:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:21,728 INFO L225 Difference]: With dead ends: 4773 [2022-03-01 17:49:21,728 INFO L226 Difference]: Without dead ends: 4686 [2022-03-01 17:49:21,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:49:21,728 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 203 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:21,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 170 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-03-01 17:49:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3483. [2022-03-01 17:49:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 4.3170591614014935) internal successors, (15032), 3482 states have internal predecessors, (15032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 15032 transitions. [2022-03-01 17:49:21,792 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 15032 transitions. Word has length 28 [2022-03-01 17:49:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:21,792 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 15032 transitions. [2022-03-01 17:49:21,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 15032 transitions. [2022-03-01 17:49:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:21,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:21,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:21,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:22,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-01 17:49:22,014 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1447063027, now seen corresponding path program 44 times [2022-03-01 17:49:22,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:22,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604514867] [2022-03-01 17:49:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:22,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:22,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604514867] [2022-03-01 17:49:22,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604514867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:22,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106410058] [2022-03-01 17:49:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:22,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:22,033 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:22,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:49:22,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106410058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:22,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:22,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:22,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751402159] [2022-03-01 17:49:22,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:22,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:22,124 INFO L87 Difference]: Start difference. First operand 3483 states and 15032 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:22,309 INFO L93 Difference]: Finished difference Result 6716 states and 27223 transitions. [2022-03-01 17:49:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:22,324 INFO L225 Difference]: With dead ends: 6716 [2022-03-01 17:49:22,324 INFO L226 Difference]: Without dead ends: 6597 [2022-03-01 17:49:22,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:22,324 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:22,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 156 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-03-01 17:49:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3920. [2022-03-01 17:49:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.364378668027558) internal successors, (17104), 3919 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 17104 transitions. [2022-03-01 17:49:22,450 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 17104 transitions. Word has length 28 [2022-03-01 17:49:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:22,450 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 17104 transitions. [2022-03-01 17:49:22,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 17104 transitions. [2022-03-01 17:49:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:22,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:22,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:22,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:49:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:49:22,671 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1768439914, now seen corresponding path program 45 times [2022-03-01 17:49:22,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:22,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018786070] [2022-03-01 17:49:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:22,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:22,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018786070] [2022-03-01 17:49:22,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018786070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:22,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978126152] [2022-03-01 17:49:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:22,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:22,696 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:22,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:49:22,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:22,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978126152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:22,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:22,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:22,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973664086] [2022-03-01 17:49:22,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:22,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:22,853 INFO L87 Difference]: Start difference. First operand 3920 states and 17104 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:23,177 INFO L93 Difference]: Finished difference Result 6429 states and 25838 transitions. [2022-03-01 17:49:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:49:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:23,192 INFO L225 Difference]: With dead ends: 6429 [2022-03-01 17:49:23,192 INFO L226 Difference]: Without dead ends: 6333 [2022-03-01 17:49:23,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:23,192 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 297 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:23,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 179 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2022-03-01 17:49:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 4098. [2022-03-01 17:49:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 4.356602391994142) internal successors, (17849), 4097 states have internal predecessors, (17849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 17849 transitions. [2022-03-01 17:49:23,279 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 17849 transitions. Word has length 28 [2022-03-01 17:49:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:23,279 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 17849 transitions. [2022-03-01 17:49:23,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 17849 transitions. [2022-03-01 17:49:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:23,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:23,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:23,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:23,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:49:23,499 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash -21827687, now seen corresponding path program 46 times [2022-03-01 17:49:23,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:23,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506516449] [2022-03-01 17:49:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:23,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:23,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506516449] [2022-03-01 17:49:23,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506516449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:23,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053087370] [2022-03-01 17:49:23,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:23,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:23,523 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:23,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:49:23,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:23,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053087370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:23,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:23,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:23,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674824555] [2022-03-01 17:49:23,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:23,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:23,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:23,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:23,687 INFO L87 Difference]: Start difference. First operand 4098 states and 17849 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:23,962 INFO L93 Difference]: Finished difference Result 4931 states and 20941 transitions. [2022-03-01 17:49:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:23,976 INFO L225 Difference]: With dead ends: 4931 [2022-03-01 17:49:23,976 INFO L226 Difference]: Without dead ends: 4931 [2022-03-01 17:49:23,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:23,976 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:23,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 147 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-03-01 17:49:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4050. [2022-03-01 17:49:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4050 states, 4049 states have (on average 4.345023462583354) internal successors, (17593), 4049 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 17593 transitions. [2022-03-01 17:49:24,057 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 17593 transitions. Word has length 28 [2022-03-01 17:49:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:24,057 INFO L470 AbstractCegarLoop]: Abstraction has 4050 states and 17593 transitions. [2022-03-01 17:49:24,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 17593 transitions. [2022-03-01 17:49:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:24,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:24,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:24,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:24,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-01 17:49:24,280 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -756473880, now seen corresponding path program 47 times [2022-03-01 17:49:24,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:24,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029910335] [2022-03-01 17:49:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:24,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029910335] [2022-03-01 17:49:24,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029910335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:24,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412062191] [2022-03-01 17:49:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:24,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:24,306 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:24,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:49:24,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:49:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412062191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:24,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:24,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:24,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103199862] [2022-03-01 17:49:24,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:24,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:24,452 INFO L87 Difference]: Start difference. First operand 4050 states and 17593 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:24,740 INFO L93 Difference]: Finished difference Result 6820 states and 27594 transitions. [2022-03-01 17:49:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:49:24,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:24,756 INFO L225 Difference]: With dead ends: 6820 [2022-03-01 17:49:24,756 INFO L226 Difference]: Without dead ends: 6464 [2022-03-01 17:49:24,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:24,757 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 223 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:24,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 171 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2022-03-01 17:49:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 3958. [2022-03-01 17:49:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 4.323982815264089) internal successors, (17110), 3957 states have internal predecessors, (17110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 17110 transitions. [2022-03-01 17:49:24,851 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 17110 transitions. Word has length 28 [2022-03-01 17:49:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:24,851 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 17110 transitions. [2022-03-01 17:49:24,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 17110 transitions. [2022-03-01 17:49:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:24,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:24,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:24,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-01 17:49:25,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:25,063 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1442852869, now seen corresponding path program 48 times [2022-03-01 17:49:25,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:25,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113575991] [2022-03-01 17:49:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:25,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:25,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113575991] [2022-03-01 17:49:25,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113575991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:25,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438568351] [2022-03-01 17:49:25,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:25,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:25,093 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:25,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:49:25,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:49:25,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:25,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438568351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:25,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:25,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:25,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712311574] [2022-03-01 17:49:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:25,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:25,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:25,278 INFO L87 Difference]: Start difference. First operand 3958 states and 17110 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:25,671 INFO L93 Difference]: Finished difference Result 5965 states and 24490 transitions. [2022-03-01 17:49:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:25,686 INFO L225 Difference]: With dead ends: 5965 [2022-03-01 17:49:25,686 INFO L226 Difference]: Without dead ends: 5890 [2022-03-01 17:49:25,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:49:25,687 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 236 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:25,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 221 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2022-03-01 17:49:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 4049. [2022-03-01 17:49:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4048 states have (on average 4.341403162055336) internal successors, (17574), 4048 states have internal predecessors, (17574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 17574 transitions. [2022-03-01 17:49:25,805 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 17574 transitions. Word has length 28 [2022-03-01 17:49:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:25,805 INFO L470 AbstractCegarLoop]: Abstraction has 4049 states and 17574 transitions. [2022-03-01 17:49:25,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 17574 transitions. [2022-03-01 17:49:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:25,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:25,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-01 17:49:26,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,031 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1026698434, now seen corresponding path program 49 times [2022-03-01 17:49:26,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:26,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790574407] [2022-03-01 17:49:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:26,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790574407] [2022-03-01 17:49:26,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790574407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:26,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991079587] [2022-03-01 17:49:26,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:26,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:26,050 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:26,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:49:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991079587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:26,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:26,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:26,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387548608] [2022-03-01 17:49:26,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:26,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:26,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:26,153 INFO L87 Difference]: Start difference. First operand 4049 states and 17574 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:26,463 INFO L93 Difference]: Finished difference Result 6450 states and 26051 transitions. [2022-03-01 17:49:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:26,478 INFO L225 Difference]: With dead ends: 6450 [2022-03-01 17:49:26,478 INFO L226 Difference]: Without dead ends: 6303 [2022-03-01 17:49:26,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:26,479 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:26,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 217 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2022-03-01 17:49:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 3931. [2022-03-01 17:49:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.367175572519084) internal successors, (17163), 3930 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 17163 transitions. [2022-03-01 17:49:26,567 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 17163 transitions. Word has length 28 [2022-03-01 17:49:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:26,568 INFO L470 AbstractCegarLoop]: Abstraction has 3931 states and 17163 transitions. [2022-03-01 17:49:26,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 17163 transitions. [2022-03-01 17:49:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:26,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:26,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:26,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:26,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,789 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1538135482, now seen corresponding path program 50 times [2022-03-01 17:49:26,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:26,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885942162] [2022-03-01 17:49:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:26,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:26,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885942162] [2022-03-01 17:49:26,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885942162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:26,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321968303] [2022-03-01 17:49:26,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:26,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:26,823 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:26,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:49:26,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321968303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:26,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:26,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:49:26,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465394720] [2022-03-01 17:49:26,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:26,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:49:26,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:49:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:49:26,933 INFO L87 Difference]: Start difference. First operand 3931 states and 17163 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:27,065 INFO L93 Difference]: Finished difference Result 4651 states and 19943 transitions. [2022-03-01 17:49:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:27,076 INFO L225 Difference]: With dead ends: 4651 [2022-03-01 17:49:27,076 INFO L226 Difference]: Without dead ends: 4608 [2022-03-01 17:49:27,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:27,077 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 155 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:27,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2022-03-01 17:49:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 3920. [2022-03-01 17:49:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.372544016330696) internal successors, (17136), 3919 states have internal predecessors, (17136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 17136 transitions. [2022-03-01 17:49:27,148 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 17136 transitions. Word has length 28 [2022-03-01 17:49:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:27,148 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 17136 transitions. [2022-03-01 17:49:27,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 17136 transitions. [2022-03-01 17:49:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:27,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:27,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:27,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:27,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:27,387 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1133094263, now seen corresponding path program 51 times [2022-03-01 17:49:27,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:27,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583389333] [2022-03-01 17:49:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:27,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583389333] [2022-03-01 17:49:27,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583389333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:27,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804414697] [2022-03-01 17:49:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:27,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:27,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:27,404 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:27,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:49:27,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804414697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:27,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:27,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:49:27,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347930370] [2022-03-01 17:49:27,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:49:27,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:49:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:49:27,510 INFO L87 Difference]: Start difference. First operand 3920 states and 17136 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:27,702 INFO L93 Difference]: Finished difference Result 5024 states and 21476 transitions. [2022-03-01 17:49:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:49:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:27,716 INFO L225 Difference]: With dead ends: 5024 [2022-03-01 17:49:27,716 INFO L226 Difference]: Without dead ends: 5024 [2022-03-01 17:49:27,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:49:27,716 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:27,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 118 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2022-03-01 17:49:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 3892. [2022-03-01 17:49:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 4.382677974813673) internal successors, (17053), 3891 states have internal predecessors, (17053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 17053 transitions. [2022-03-01 17:49:27,787 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 17053 transitions. Word has length 28 [2022-03-01 17:49:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:27,787 INFO L470 AbstractCegarLoop]: Abstraction has 3892 states and 17053 transitions. [2022-03-01 17:49:27,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 17053 transitions. [2022-03-01 17:49:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:27,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:27,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:27,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:28,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,009 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2139044652, now seen corresponding path program 52 times [2022-03-01 17:49:28,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:28,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127452244] [2022-03-01 17:49:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:28,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:28,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127452244] [2022-03-01 17:49:28,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127452244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:28,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877355549] [2022-03-01 17:49:28,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:28,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:28,032 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:28,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:49:28,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877355549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:28,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:28,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:28,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149925761] [2022-03-01 17:49:28,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:28,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:28,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:28,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:28,196 INFO L87 Difference]: Start difference. First operand 3892 states and 17053 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:28,522 INFO L93 Difference]: Finished difference Result 6236 states and 25216 transitions. [2022-03-01 17:49:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:28,536 INFO L225 Difference]: With dead ends: 6236 [2022-03-01 17:49:28,536 INFO L226 Difference]: Without dead ends: 5996 [2022-03-01 17:49:28,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:28,537 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 392 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:28,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 164 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2022-03-01 17:49:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 3845. [2022-03-01 17:49:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 4.412591050988554) internal successors, (16962), 3844 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 16962 transitions. [2022-03-01 17:49:28,628 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 16962 transitions. Word has length 28 [2022-03-01 17:49:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:28,628 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 16962 transitions. [2022-03-01 17:49:28,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 16962 transitions. [2022-03-01 17:49:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:28,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:28,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:28,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:28,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,850 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -409310417, now seen corresponding path program 53 times [2022-03-01 17:49:28,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:28,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494266317] [2022-03-01 17:49:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:28,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494266317] [2022-03-01 17:49:28,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494266317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:28,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730226000] [2022-03-01 17:49:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:28,867 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:49:28,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:28,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730226000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:29,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:29,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:29,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018709029] [2022-03-01 17:49:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:29,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:29,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:29,020 INFO L87 Difference]: Start difference. First operand 3845 states and 16962 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:29,353 INFO L93 Difference]: Finished difference Result 5643 states and 23426 transitions. [2022-03-01 17:49:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:49:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:29,367 INFO L225 Difference]: With dead ends: 5643 [2022-03-01 17:49:29,367 INFO L226 Difference]: Without dead ends: 5347 [2022-03-01 17:49:29,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:29,367 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 197 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:29,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 227 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-03-01 17:49:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3834. [2022-03-01 17:49:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 4.445343073310723) internal successors, (17039), 3833 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 17039 transitions. [2022-03-01 17:49:29,440 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 17039 transitions. Word has length 28 [2022-03-01 17:49:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:29,440 INFO L470 AbstractCegarLoop]: Abstraction has 3834 states and 17039 transitions. [2022-03-01 17:49:29,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 17039 transitions. [2022-03-01 17:49:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:29,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:29,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:29,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:29,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-01 17:49:29,662 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1143956610, now seen corresponding path program 54 times [2022-03-01 17:49:29,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:29,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493567611] [2022-03-01 17:49:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:29,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:29,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493567611] [2022-03-01 17:49:29,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493567611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:29,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312204156] [2022-03-01 17:49:29,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:29,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:29,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:29,682 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:49:29,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:49:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312204156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:29,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:29,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:29,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691793941] [2022-03-01 17:49:29,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:29,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:29,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:29,805 INFO L87 Difference]: Start difference. First operand 3834 states and 17039 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:30,067 INFO L93 Difference]: Finished difference Result 6713 states and 27548 transitions. [2022-03-01 17:49:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:30,085 INFO L225 Difference]: With dead ends: 6713 [2022-03-01 17:49:30,085 INFO L226 Difference]: Without dead ends: 6433 [2022-03-01 17:49:30,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:30,086 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 340 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:30,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 133 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2022-03-01 17:49:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 3992. [2022-03-01 17:49:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 4.463292407917815) internal successors, (17813), 3991 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 17813 transitions. [2022-03-01 17:49:30,191 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 17813 transitions. Word has length 28 [2022-03-01 17:49:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:30,192 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 17813 transitions. [2022-03-01 17:49:30,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 17813 transitions. [2022-03-01 17:49:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:30,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:30,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:30,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:30,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-01 17:49:30,416 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash 573759429, now seen corresponding path program 55 times [2022-03-01 17:49:30,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:30,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911938574] [2022-03-01 17:49:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:30,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:30,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:30,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911938574] [2022-03-01 17:49:30,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911938574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:30,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777197576] [2022-03-01 17:49:30,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:30,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:30,435 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:30,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:49:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:30,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:30,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:30,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777197576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:30,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:30,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:30,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664478155] [2022-03-01 17:49:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:30,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:30,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:30,567 INFO L87 Difference]: Start difference. First operand 3992 states and 17813 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:30,863 INFO L93 Difference]: Finished difference Result 5143 states and 21875 transitions. [2022-03-01 17:49:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:30,875 INFO L225 Difference]: With dead ends: 5143 [2022-03-01 17:49:30,875 INFO L226 Difference]: Without dead ends: 5064 [2022-03-01 17:49:30,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:49:30,876 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 178 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:30,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 206 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2022-03-01 17:49:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 3723. [2022-03-01 17:49:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3722 states have (on average 4.434443847393874) internal successors, (16505), 3722 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 16505 transitions. [2022-03-01 17:49:30,968 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 16505 transitions. Word has length 28 [2022-03-01 17:49:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:30,968 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 16505 transitions. [2022-03-01 17:49:30,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 16505 transitions. [2022-03-01 17:49:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:30,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:30,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:30,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:31,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:49:31,188 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -387556167, now seen corresponding path program 56 times [2022-03-01 17:49:31,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:31,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331670340] [2022-03-01 17:49:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:31,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331670340] [2022-03-01 17:49:31,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331670340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:31,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736555605] [2022-03-01 17:49:31,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:31,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:31,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:31,213 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:31,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:49:31,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:31,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736555605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:31,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:31,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:49:31,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650005867] [2022-03-01 17:49:31,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:31,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:49:31,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:49:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:49:31,352 INFO L87 Difference]: Start difference. First operand 3723 states and 16505 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:31,701 INFO L93 Difference]: Finished difference Result 6572 states and 27482 transitions. [2022-03-01 17:49:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:31,719 INFO L225 Difference]: With dead ends: 6572 [2022-03-01 17:49:31,719 INFO L226 Difference]: Without dead ends: 6342 [2022-03-01 17:49:31,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:31,719 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 262 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:31,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 215 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-03-01 17:49:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3945. [2022-03-01 17:49:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.505324543610548) internal successors, (17769), 3944 states have internal predecessors, (17769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 17769 transitions. [2022-03-01 17:49:31,803 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 17769 transitions. Word has length 28 [2022-03-01 17:49:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:31,803 INFO L470 AbstractCegarLoop]: Abstraction has 3945 states and 17769 transitions. [2022-03-01 17:49:31,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 17769 transitions. [2022-03-01 17:49:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:31,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:31,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:32,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-01 17:49:32,026 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1077139884, now seen corresponding path program 57 times [2022-03-01 17:49:32,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:32,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959992559] [2022-03-01 17:49:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:32,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959992559] [2022-03-01 17:49:32,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959992559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:32,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207299211] [2022-03-01 17:49:32,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:32,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:32,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:32,048 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:32,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:49:32,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:49:32,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:32,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207299211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:32,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:32,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:32,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572478744] [2022-03-01 17:49:32,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:32,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:32,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:32,203 INFO L87 Difference]: Start difference. First operand 3945 states and 17769 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:32,527 INFO L93 Difference]: Finished difference Result 5593 states and 23559 transitions. [2022-03-01 17:49:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:32,541 INFO L225 Difference]: With dead ends: 5593 [2022-03-01 17:49:32,541 INFO L226 Difference]: Without dead ends: 5500 [2022-03-01 17:49:32,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:32,541 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 210 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:32,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 184 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2022-03-01 17:49:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 3854. [2022-03-01 17:49:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3853 states have (on average 4.518037892551258) internal successors, (17408), 3853 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 17408 transitions. [2022-03-01 17:49:32,651 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 17408 transitions. Word has length 28 [2022-03-01 17:49:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:32,651 INFO L470 AbstractCegarLoop]: Abstraction has 3854 states and 17408 transitions. [2022-03-01 17:49:32,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 17408 transitions. [2022-03-01 17:49:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:32,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:32,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:32,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:32,873 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 409506729, now seen corresponding path program 58 times [2022-03-01 17:49:32,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:32,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422943332] [2022-03-01 17:49:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:32,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422943332] [2022-03-01 17:49:32,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422943332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:32,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836291178] [2022-03-01 17:49:32,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:32,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:32,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:32,893 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:32,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:49:32,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836291178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:33,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:33,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:49:33,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175033277] [2022-03-01 17:49:33,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:33,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:33,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:33,026 INFO L87 Difference]: Start difference. First operand 3854 states and 17408 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:33,251 INFO L93 Difference]: Finished difference Result 6639 states and 28252 transitions. [2022-03-01 17:49:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:33,270 INFO L225 Difference]: With dead ends: 6639 [2022-03-01 17:49:33,270 INFO L226 Difference]: Without dead ends: 6520 [2022-03-01 17:49:33,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:49:33,270 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 209 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:33,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 157 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-03-01 17:49:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 3611. [2022-03-01 17:49:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 4.4673130193905815) internal successors, (16127), 3610 states have internal predecessors, (16127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 16127 transitions. [2022-03-01 17:49:33,361 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 16127 transitions. Word has length 28 [2022-03-01 17:49:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:33,361 INFO L470 AbstractCegarLoop]: Abstraction has 3611 states and 16127 transitions. [2022-03-01 17:49:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 16127 transitions. [2022-03-01 17:49:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:33,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:33,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:33,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-01 17:49:33,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-03-01 17:49:33,583 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash -485045616, now seen corresponding path program 59 times [2022-03-01 17:49:33,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:33,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790526331] [2022-03-01 17:49:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:33,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790526331] [2022-03-01 17:49:33,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790526331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:33,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003097906] [2022-03-01 17:49:33,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:33,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:33,610 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:33,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:49:33,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:33,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003097906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:33,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:33,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:49:33,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831476622] [2022-03-01 17:49:33,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:49:33,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:49:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:49:33,757 INFO L87 Difference]: Start difference. First operand 3611 states and 16127 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:33,926 INFO L93 Difference]: Finished difference Result 4871 states and 21135 transitions. [2022-03-01 17:49:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:49:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:33,939 INFO L225 Difference]: With dead ends: 4871 [2022-03-01 17:49:33,939 INFO L226 Difference]: Without dead ends: 4871 [2022-03-01 17:49:33,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:49:33,939 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:33,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 82 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-03-01 17:49:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2022-03-01 17:49:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 4.499150622876557) internal successors, (15891), 3532 states have internal predecessors, (15891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 15891 transitions. [2022-03-01 17:49:34,009 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 15891 transitions. Word has length 28 [2022-03-01 17:49:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 15891 transitions. [2022-03-01 17:49:34,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 15891 transitions. [2022-03-01 17:49:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:34,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:34,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:34,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:34,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,231 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 264684393, now seen corresponding path program 60 times [2022-03-01 17:49:34,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:34,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78042128] [2022-03-01 17:49:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:34,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:34,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78042128] [2022-03-01 17:49:34,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78042128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:34,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068795655] [2022-03-01 17:49:34,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:34,256 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:34,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:49:34,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068795655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:34,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:34,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:49:34,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647719823] [2022-03-01 17:49:34,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:34,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:49:34,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:49:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:49:34,362 INFO L87 Difference]: Start difference. First operand 3533 states and 15891 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:34,569 INFO L93 Difference]: Finished difference Result 4507 states and 19560 transitions. [2022-03-01 17:49:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:34,580 INFO L225 Difference]: With dead ends: 4507 [2022-03-01 17:49:34,580 INFO L226 Difference]: Without dead ends: 4386 [2022-03-01 17:49:34,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:34,581 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 149 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:34,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 134 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2022-03-01 17:49:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3531. [2022-03-01 17:49:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 4.497733711048158) internal successors, (15877), 3530 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 15877 transitions. [2022-03-01 17:49:34,641 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 15877 transitions. Word has length 28 [2022-03-01 17:49:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:34,641 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 15877 transitions. [2022-03-01 17:49:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 15877 transitions. [2022-03-01 17:49:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:34,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:34,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:34,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:34,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,862 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1308166254, now seen corresponding path program 61 times [2022-03-01 17:49:34,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:34,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303968626] [2022-03-01 17:49:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:34,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303968626] [2022-03-01 17:49:34,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303968626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:34,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175182560] [2022-03-01 17:49:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:34,885 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:49:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:34,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175182560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:35,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:35,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:35,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991180013] [2022-03-01 17:49:35,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:35,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:35,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:35,025 INFO L87 Difference]: Start difference. First operand 3531 states and 15877 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:35,231 INFO L93 Difference]: Finished difference Result 4381 states and 19028 transitions. [2022-03-01 17:49:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:35,243 INFO L225 Difference]: With dead ends: 4381 [2022-03-01 17:49:35,243 INFO L226 Difference]: Without dead ends: 4381 [2022-03-01 17:49:35,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:35,243 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:35,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 156 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2022-03-01 17:49:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3651. [2022-03-01 17:49:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 4.494520547945205) internal successors, (16405), 3650 states have internal predecessors, (16405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 16405 transitions. [2022-03-01 17:49:35,309 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 16405 transitions. Word has length 28 [2022-03-01 17:49:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:35,309 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 16405 transitions. [2022-03-01 17:49:35,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 16405 transitions. [2022-03-01 17:49:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:35,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:35,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:35,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-01 17:49:35,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:35,531 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2125209807, now seen corresponding path program 62 times [2022-03-01 17:49:35,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:35,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508477035] [2022-03-01 17:49:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:35,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508477035] [2022-03-01 17:49:35,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508477035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:35,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187165060] [2022-03-01 17:49:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:35,554 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:35,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:49:35,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:35,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187165060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:35,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:35,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:35,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502218041] [2022-03-01 17:49:35,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:35,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:35,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:35,686 INFO L87 Difference]: Start difference. First operand 3651 states and 16405 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:35,924 INFO L93 Difference]: Finished difference Result 5662 states and 23795 transitions. [2022-03-01 17:49:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:49:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:35,938 INFO L225 Difference]: With dead ends: 5662 [2022-03-01 17:49:35,938 INFO L226 Difference]: Without dead ends: 5558 [2022-03-01 17:49:35,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:35,938 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 263 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:35,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 158 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5558 states. [2022-03-01 17:49:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5558 to 3708. [2022-03-01 17:49:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 4.506069598057729) internal successors, (16704), 3707 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 16704 transitions. [2022-03-01 17:49:36,015 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 16704 transitions. Word has length 28 [2022-03-01 17:49:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 16704 transitions. [2022-03-01 17:49:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 16704 transitions. [2022-03-01 17:49:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:36,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:36,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:36,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:36,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,247 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:36,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1450922654, now seen corresponding path program 63 times [2022-03-01 17:49:36,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:36,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248234278] [2022-03-01 17:49:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:36,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248234278] [2022-03-01 17:49:36,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248234278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:36,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194995663] [2022-03-01 17:49:36,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:36,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:36,285 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:36,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:49:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194995663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:36,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:36,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:36,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711419294] [2022-03-01 17:49:36,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:36,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:36,392 INFO L87 Difference]: Start difference. First operand 3708 states and 16704 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:36,579 INFO L93 Difference]: Finished difference Result 5802 states and 24222 transitions. [2022-03-01 17:49:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:36,594 INFO L225 Difference]: With dead ends: 5802 [2022-03-01 17:49:36,594 INFO L226 Difference]: Without dead ends: 5550 [2022-03-01 17:49:36,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:49:36,595 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 261 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:36,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 141 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:49:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2022-03-01 17:49:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 3996. [2022-03-01 17:49:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.518648310387985) internal successors, (18052), 3995 states have internal predecessors, (18052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 18052 transitions. [2022-03-01 17:49:36,687 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 18052 transitions. Word has length 28 [2022-03-01 17:49:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:36,687 INFO L470 AbstractCegarLoop]: Abstraction has 3996 states and 18052 transitions. [2022-03-01 17:49:36,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 18052 transitions. [2022-03-01 17:49:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:36,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:36,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:36,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-01 17:49:36,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,899 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1107510849, now seen corresponding path program 64 times [2022-03-01 17:49:36,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:36,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742579412] [2022-03-01 17:49:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:36,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742579412] [2022-03-01 17:49:36,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742579412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:36,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548652016] [2022-03-01 17:49:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:36,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:36,925 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:36,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:49:36,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:36,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:36,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548652016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:37,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:37,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:37,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260203631] [2022-03-01 17:49:37,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:37,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:37,075 INFO L87 Difference]: Start difference. First operand 3996 states and 18052 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:37,410 INFO L93 Difference]: Finished difference Result 7825 states and 33142 transitions. [2022-03-01 17:49:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:37,431 INFO L225 Difference]: With dead ends: 7825 [2022-03-01 17:49:37,431 INFO L226 Difference]: Without dead ends: 7735 [2022-03-01 17:49:37,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:37,432 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 358 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:37,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 143 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2022-03-01 17:49:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 4578. [2022-03-01 17:49:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.544242953899935) internal successors, (20799), 4577 states have internal predecessors, (20799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 20799 transitions. [2022-03-01 17:49:37,549 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 20799 transitions. Word has length 28 [2022-03-01 17:49:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 4578 states and 20799 transitions. [2022-03-01 17:49:37,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 20799 transitions. [2022-03-01 17:49:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:37,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:37,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:37,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:37,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-01 17:49:37,774 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2118492596, now seen corresponding path program 65 times [2022-03-01 17:49:37,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:37,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729226051] [2022-03-01 17:49:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:37,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729226051] [2022-03-01 17:49:37,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729226051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:37,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321877492] [2022-03-01 17:49:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:37,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:37,801 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:49:37,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:49:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321877492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:37,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:37,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:37,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925846207] [2022-03-01 17:49:37,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:37,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:37,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:37,923 INFO L87 Difference]: Start difference. First operand 4578 states and 20799 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:38,267 INFO L93 Difference]: Finished difference Result 5599 states and 24278 transitions. [2022-03-01 17:49:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:38,282 INFO L225 Difference]: With dead ends: 5599 [2022-03-01 17:49:38,282 INFO L226 Difference]: Without dead ends: 5516 [2022-03-01 17:49:38,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:38,282 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 199 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:38,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 173 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-03-01 17:49:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4395. [2022-03-01 17:49:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4394 states have (on average 4.547792444242148) internal successors, (19983), 4394 states have internal predecessors, (19983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 19983 transitions. [2022-03-01 17:49:38,388 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 19983 transitions. Word has length 28 [2022-03-01 17:49:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:38,388 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 19983 transitions. [2022-03-01 17:49:38,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 19983 transitions. [2022-03-01 17:49:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:49:38,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:38,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:38,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:38,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:38,611 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -631845983, now seen corresponding path program 66 times [2022-03-01 17:49:38,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:38,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299958183] [2022-03-01 17:49:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:38,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299958183] [2022-03-01 17:49:38,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299958183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:38,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048000694] [2022-03-01 17:49:38,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:38,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:38,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:38,645 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:38,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:49:38,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:49:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048000694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:38,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:38,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:49:38,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661042092] [2022-03-01 17:49:38,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:49:38,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:49:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:49:38,789 INFO L87 Difference]: Start difference. First operand 4395 states and 19983 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:39,075 INFO L93 Difference]: Finished difference Result 7306 states and 31184 transitions. [2022-03-01 17:49:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:49:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:49:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:39,094 INFO L225 Difference]: With dead ends: 7306 [2022-03-01 17:49:39,095 INFO L226 Difference]: Without dead ends: 7173 [2022-03-01 17:49:39,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:49:39,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:39,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 177 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-03-01 17:49:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4142. [2022-03-01 17:49:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4141 states have (on average 4.544071480318763) internal successors, (18817), 4141 states have internal predecessors, (18817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 18817 transitions. [2022-03-01 17:49:39,192 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 18817 transitions. Word has length 28 [2022-03-01 17:49:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:39,192 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 18817 transitions. [2022-03-01 17:49:39,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 18817 transitions. [2022-03-01 17:49:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:39,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:39,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:39,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:39,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:39,415 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1737203471, now seen corresponding path program 67 times [2022-03-01 17:49:39,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:39,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819781425] [2022-03-01 17:49:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:39,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:39,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:39,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819781425] [2022-03-01 17:49:39,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819781425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:39,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884891978] [2022-03-01 17:49:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:39,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:39,767 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:39,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:49:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:49:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:40,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:49:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:40,478 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:49:40,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:49:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:40,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:49:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884891978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:40,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:40,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-01 17:49:40,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785046075] [2022-03-01 17:49:40,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:40,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:49:40,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:49:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:40,547 INFO L87 Difference]: Start difference. First operand 4142 states and 18817 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:41,726 INFO L93 Difference]: Finished difference Result 5478 states and 23821 transitions. [2022-03-01 17:49:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:41,740 INFO L225 Difference]: With dead ends: 5478 [2022-03-01 17:49:41,741 INFO L226 Difference]: Without dead ends: 5397 [2022-03-01 17:49:41,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:49:41,741 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 304 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1090 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:41,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 216 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2486 Invalid, 0 Unknown, 1090 Unchecked, 0.8s Time] [2022-03-01 17:49:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2022-03-01 17:49:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4208. [2022-03-01 17:49:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4208 states, 4207 states have (on average 4.532683622533872) internal successors, (19069), 4207 states have internal predecessors, (19069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 19069 transitions. [2022-03-01 17:49:41,823 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 19069 transitions. Word has length 30 [2022-03-01 17:49:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 4208 states and 19069 transitions. [2022-03-01 17:49:41,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 19069 transitions. [2022-03-01 17:49:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:41,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:41,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:41,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:42,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-01 17:49:42,046 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1848727534, now seen corresponding path program 1 times [2022-03-01 17:49:42,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:42,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468661734] [2022-03-01 17:49:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:42,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468661734] [2022-03-01 17:49:42,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468661734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:42,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363433467] [2022-03-01 17:49:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:42,237 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:42,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:49:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:49:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:42,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:49:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:42,727 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:49:42,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:49:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:42,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:49:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363433467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:42,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:42,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-01 17:49:42,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234481482] [2022-03-01 17:49:42,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:42,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:49:42,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:49:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:42,782 INFO L87 Difference]: Start difference. First operand 4208 states and 19069 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:43,624 INFO L93 Difference]: Finished difference Result 4811 states and 21445 transitions. [2022-03-01 17:49:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:49:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:43,636 INFO L225 Difference]: With dead ends: 4811 [2022-03-01 17:49:43,637 INFO L226 Difference]: Without dead ends: 4738 [2022-03-01 17:49:43,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:49:43,637 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 919 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:43,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 195 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1893 Invalid, 0 Unknown, 919 Unchecked, 0.5s Time] [2022-03-01 17:49:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-03-01 17:49:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4224. [2022-03-01 17:49:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 4.531139000710396) internal successors, (19135), 4223 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 19135 transitions. [2022-03-01 17:49:43,718 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 19135 transitions. Word has length 30 [2022-03-01 17:49:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:43,718 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 19135 transitions. [2022-03-01 17:49:43,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 19135 transitions. [2022-03-01 17:49:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:43,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:43,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:43,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:43,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:43,942 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash -456582988, now seen corresponding path program 2 times [2022-03-01 17:49:43,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:43,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938317108] [2022-03-01 17:49:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938317108] [2022-03-01 17:49:44,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938317108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863621594] [2022-03-01 17:49:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:44,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:44,089 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:49:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:49:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:44,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:44,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:44,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:49:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:44,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:44,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:49:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:45,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863621594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:45,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:45,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2022-03-01 17:49:45,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748134572] [2022-03-01 17:49:45,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:45,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:49:45,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:49:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:45,021 INFO L87 Difference]: Start difference. First operand 4224 states and 19135 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:46,546 INFO L93 Difference]: Finished difference Result 5644 states and 24147 transitions. [2022-03-01 17:49:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:49:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:46,561 INFO L225 Difference]: With dead ends: 5644 [2022-03-01 17:49:46,561 INFO L226 Difference]: Without dead ends: 5541 [2022-03-01 17:49:46,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:49:46,561 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 256 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:46,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 244 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2661 Invalid, 0 Unknown, 674 Unchecked, 0.9s Time] [2022-03-01 17:49:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2022-03-01 17:49:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 4269. [2022-03-01 17:49:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 4268 states have (on average 4.5220243673851925) internal successors, (19300), 4268 states have internal predecessors, (19300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 19300 transitions. [2022-03-01 17:49:46,646 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 19300 transitions. Word has length 30 [2022-03-01 17:49:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 4269 states and 19300 transitions. [2022-03-01 17:49:46,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 19300 transitions. [2022-03-01 17:49:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:46,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:46,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:46,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-01 17:49:46,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-01 17:49:46,873 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:46,873 INFO L85 PathProgramCache]: Analyzing trace with hash -962929254, now seen corresponding path program 3 times [2022-03-01 17:49:46,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:46,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376455207] [2022-03-01 17:49:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:46,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:47,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376455207] [2022-03-01 17:49:47,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376455207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:47,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447239766] [2022-03-01 17:49:47,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:47,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:47,027 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:47,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:49:47,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:49:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:47,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:47,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:47,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:49:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:48,044 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:49:48,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:49:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:48,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447239766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:48,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:48,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-03-01 17:49:48,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155329378] [2022-03-01 17:49:48,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:48,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:49:48,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:49:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:48,173 INFO L87 Difference]: Start difference. First operand 4269 states and 19300 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:49,383 INFO L93 Difference]: Finished difference Result 4894 states and 21545 transitions. [2022-03-01 17:49:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:49:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:49,395 INFO L225 Difference]: With dead ends: 4894 [2022-03-01 17:49:49,395 INFO L226 Difference]: Without dead ends: 4802 [2022-03-01 17:49:49,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:49:49,395 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 293 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1207 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:49,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 187 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1424 Invalid, 0 Unknown, 1207 Unchecked, 0.7s Time] [2022-03-01 17:49:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-03-01 17:49:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4422. [2022-03-01 17:49:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 4.494684460529292) internal successors, (19871), 4421 states have internal predecessors, (19871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 19871 transitions. [2022-03-01 17:49:49,469 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 19871 transitions. Word has length 30 [2022-03-01 17:49:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:49,469 INFO L470 AbstractCegarLoop]: Abstraction has 4422 states and 19871 transitions. [2022-03-01 17:49:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 19871 transitions. [2022-03-01 17:49:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:49,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:49,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:49,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:49,691 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1537645614, now seen corresponding path program 4 times [2022-03-01 17:49:49,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:49,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687778069] [2022-03-01 17:49:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:49,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:49,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687778069] [2022-03-01 17:49:49,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687778069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:49,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891409214] [2022-03-01 17:49:49,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:49,895 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:49:49,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:49:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:50,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 17:49:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:50,415 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:49:50,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:49:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891409214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:50,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:50,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:49:50,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859553062] [2022-03-01 17:49:50,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:50,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:49:50,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:49:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:49:50,501 INFO L87 Difference]: Start difference. First operand 4422 states and 19871 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:52,096 INFO L93 Difference]: Finished difference Result 6059 states and 26616 transitions. [2022-03-01 17:49:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:49:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:52,112 INFO L225 Difference]: With dead ends: 6059 [2022-03-01 17:49:52,113 INFO L226 Difference]: Without dead ends: 5978 [2022-03-01 17:49:52,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:49:52,113 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 398 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:52,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 213 Invalid, 3740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3485 Invalid, 0 Unknown, 115 Unchecked, 1.1s Time] [2022-03-01 17:49:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2022-03-01 17:49:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4492. [2022-03-01 17:49:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 4491 states have (on average 4.481629926519706) internal successors, (20127), 4491 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 20127 transitions. [2022-03-01 17:49:52,244 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 20127 transitions. Word has length 30 [2022-03-01 17:49:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:52,245 INFO L470 AbstractCegarLoop]: Abstraction has 4492 states and 20127 transitions. [2022-03-01 17:49:52,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 20127 transitions. [2022-03-01 17:49:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:52,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:52,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:52,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:52,467 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1649169677, now seen corresponding path program 27 times [2022-03-01 17:49:52,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:52,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748676501] [2022-03-01 17:49:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:52,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:52,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:52,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748676501] [2022-03-01 17:49:52,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748676501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:52,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500024308] [2022-03-01 17:49:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:52,649 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:52,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:49:52,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:49:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:52,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 17:49:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:52,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:53,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:53,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 57 [2022-03-01 17:49:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:53,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500024308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:53,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:53,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 17:49:53,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595884716] [2022-03-01 17:49:53,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:49:53,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:49:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:53,475 INFO L87 Difference]: Start difference. First operand 4492 states and 20127 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:56,043 INFO L93 Difference]: Finished difference Result 7430 states and 31438 transitions. [2022-03-01 17:49:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:49:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:56,062 INFO L225 Difference]: With dead ends: 7430 [2022-03-01 17:49:56,062 INFO L226 Difference]: Without dead ends: 7270 [2022-03-01 17:49:56,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=4955, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:49:56,063 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 406 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 5860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1775 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:56,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 386 Invalid, 5860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3908 Invalid, 0 Unknown, 1775 Unchecked, 1.4s Time] [2022-03-01 17:49:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2022-03-01 17:49:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 4735. [2022-03-01 17:49:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 4.437473595268272) internal successors, (21007), 4734 states have internal predecessors, (21007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 21007 transitions. [2022-03-01 17:49:56,170 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 21007 transitions. Word has length 30 [2022-03-01 17:49:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:56,170 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 21007 transitions. [2022-03-01 17:49:56,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 21007 transitions. [2022-03-01 17:49:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:56,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:56,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:56,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:56,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,394 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 388388464, now seen corresponding path program 5 times [2022-03-01 17:49:56,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:56,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726060500] [2022-03-01 17:49:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:56,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:56,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726060500] [2022-03-01 17:49:56,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726060500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:56,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030920172] [2022-03-01 17:49:56,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:56,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:56,577 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:56,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:49:56,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:56,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:49:56,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:56,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:56,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:49:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:57,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:57,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 54 [2022-03-01 17:49:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030920172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:57,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:57,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:49:57,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823623861] [2022-03-01 17:49:57,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:49:57,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:49:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:57,376 INFO L87 Difference]: Start difference. First operand 4735 states and 21007 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:59,385 INFO L93 Difference]: Finished difference Result 7436 states and 31753 transitions. [2022-03-01 17:49:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:49:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:49:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:59,403 INFO L225 Difference]: With dead ends: 7436 [2022-03-01 17:49:59,404 INFO L226 Difference]: Without dead ends: 7100 [2022-03-01 17:49:59,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=494, Invalid=3046, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:49:59,404 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 368 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:59,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 290 Invalid, 3538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3114 Invalid, 0 Unknown, 311 Unchecked, 1.1s Time] [2022-03-01 17:49:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2022-03-01 17:49:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 4992. [2022-03-01 17:49:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4991 states have (on average 4.397715888599479) internal successors, (21949), 4991 states have internal predecessors, (21949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 21949 transitions. [2022-03-01 17:49:59,503 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 21949 transitions. Word has length 30 [2022-03-01 17:49:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:59,503 INFO L470 AbstractCegarLoop]: Abstraction has 4992 states and 21949 transitions. [2022-03-01 17:49:59,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 21949 transitions. [2022-03-01 17:49:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:49:59,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:59,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:59,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:49:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:59,715 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash -117957802, now seen corresponding path program 6 times [2022-03-01 17:49:59,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:59,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932084218] [2022-03-01 17:49:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:59,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:59,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932084218] [2022-03-01 17:49:59,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932084218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:59,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371321635] [2022-03-01 17:49:59,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:59,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:59,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:59,882 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:49:59,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:49:59,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:49:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:00,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:00,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-03-01 17:50:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:00,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:03,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:03,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:03,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-03-01 17:50:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:03,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371321635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:03,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:03,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:50:03,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71326221] [2022-03-01 17:50:03,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:03,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:50:03,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:50:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=817, Unknown=1, NotChecked=0, Total=930 [2022-03-01 17:50:03,624 INFO L87 Difference]: Start difference. First operand 4992 states and 21949 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:06,979 INFO L93 Difference]: Finished difference Result 6933 states and 29528 transitions. [2022-03-01 17:50:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:50:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:06,997 INFO L225 Difference]: With dead ends: 6933 [2022-03-01 17:50:06,997 INFO L226 Difference]: Without dead ends: 6926 [2022-03-01 17:50:06,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 15 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=399, Invalid=2570, Unknown=1, NotChecked=0, Total=2970 [2022-03-01 17:50:06,998 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 237 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1583 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:06,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 318 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1028 Invalid, 0 Unknown, 1583 Unchecked, 0.4s Time] [2022-03-01 17:50:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2022-03-01 17:50:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5156. [2022-03-01 17:50:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5156 states, 5155 states have (on average 4.359262851600388) internal successors, (22472), 5155 states have internal predecessors, (22472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 22472 transitions. [2022-03-01 17:50:07,106 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 22472 transitions. Word has length 30 [2022-03-01 17:50:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:07,106 INFO L470 AbstractCegarLoop]: Abstraction has 5156 states and 22472 transitions. [2022-03-01 17:50:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 22472 transitions. [2022-03-01 17:50:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:07,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:07,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:07,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:50:07,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-01 17:50:07,323 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -89328651, now seen corresponding path program 1 times [2022-03-01 17:50:07,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:07,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744925381] [2022-03-01 17:50:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:07,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744925381] [2022-03-01 17:50:07,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744925381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:07,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945585724] [2022-03-01 17:50:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:07,530 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:07,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:50:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:07,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:50:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:07,953 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:07,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:50:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:08,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945585724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:08,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:08,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:50:08,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863287381] [2022-03-01 17:50:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:08,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:50:08,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:08,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:50:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:50:08,036 INFO L87 Difference]: Start difference. First operand 5156 states and 22472 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:09,954 INFO L93 Difference]: Finished difference Result 6735 states and 28977 transitions. [2022-03-01 17:50:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:50:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:09,973 INFO L225 Difference]: With dead ends: 6735 [2022-03-01 17:50:09,973 INFO L226 Difference]: Without dead ends: 6652 [2022-03-01 17:50:09,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:50:09,974 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 347 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 3757 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:09,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 215 Invalid, 3918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3757 Invalid, 0 Unknown, 23 Unchecked, 1.3s Time] [2022-03-01 17:50:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2022-03-01 17:50:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 5001. [2022-03-01 17:50:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 4.3982) internal successors, (21991), 5000 states have internal predecessors, (21991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 21991 transitions. [2022-03-01 17:50:10,079 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 21991 transitions. Word has length 30 [2022-03-01 17:50:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:10,079 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 21991 transitions. [2022-03-01 17:50:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 21991 transitions. [2022-03-01 17:50:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:10,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:10,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:10,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-01 17:50:10,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:10,303 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1412566352, now seen corresponding path program 7 times [2022-03-01 17:50:10,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:10,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775082093] [2022-03-01 17:50:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:10,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775082093] [2022-03-01 17:50:10,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775082093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:10,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384512323] [2022-03-01 17:50:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:10,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:10,437 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:10,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:50:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:10,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:50:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:10,786 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:10,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:50:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384512323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:10,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:10,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:50:10,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828241421] [2022-03-01 17:50:10,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:10,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:50:10,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:50:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:50:10,847 INFO L87 Difference]: Start difference. First operand 5001 states and 21991 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:12,229 INFO L93 Difference]: Finished difference Result 6597 states and 28573 transitions. [2022-03-01 17:50:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:50:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:12,249 INFO L225 Difference]: With dead ends: 6597 [2022-03-01 17:50:12,249 INFO L226 Difference]: Without dead ends: 6504 [2022-03-01 17:50:12,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:50:12,249 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 354 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:12,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 163 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2796 Invalid, 0 Unknown, 23 Unchecked, 0.9s Time] [2022-03-01 17:50:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2022-03-01 17:50:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 4795. [2022-03-01 17:50:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4794 states have (on average 4.434501460158532) internal successors, (21259), 4794 states have internal predecessors, (21259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 21259 transitions. [2022-03-01 17:50:12,349 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 21259 transitions. Word has length 30 [2022-03-01 17:50:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:12,349 INFO L470 AbstractCegarLoop]: Abstraction has 4795 states and 21259 transitions. [2022-03-01 17:50:12,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 21259 transitions. [2022-03-01 17:50:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:12,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:12,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:12,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:50:12,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-01 17:50:12,572 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash -967117165, now seen corresponding path program 1 times [2022-03-01 17:50:12,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:12,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067532977] [2022-03-01 17:50:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:12,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:12,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:12,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067532977] [2022-03-01 17:50:12,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067532977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:12,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892407904] [2022-03-01 17:50:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:12,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:12,822 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:12,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:50:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:13,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:13,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:13,587 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:13,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:13,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:13,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892407904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:13,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:13,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-01 17:50:13,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181709838] [2022-03-01 17:50:13,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:13,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:50:13,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:50:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:13,679 INFO L87 Difference]: Start difference. First operand 4795 states and 21259 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:14,545 INFO L93 Difference]: Finished difference Result 5803 states and 25054 transitions. [2022-03-01 17:50:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:50:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:14,560 INFO L225 Difference]: With dead ends: 5803 [2022-03-01 17:50:14,561 INFO L226 Difference]: Without dead ends: 5722 [2022-03-01 17:50:14,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:50:14,561 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 211 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:14,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 189 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1852 Invalid, 0 Unknown, 354 Unchecked, 0.5s Time] [2022-03-01 17:50:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2022-03-01 17:50:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 4994. [2022-03-01 17:50:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4993 states have (on average 4.41377929100741) internal successors, (22038), 4993 states have internal predecessors, (22038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 22038 transitions. [2022-03-01 17:50:14,654 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 22038 transitions. Word has length 30 [2022-03-01 17:50:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 4994 states and 22038 transitions. [2022-03-01 17:50:14,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 22038 transitions. [2022-03-01 17:50:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:14,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:14,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:14,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-01 17:50:14,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:50:14,876 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -732063226, now seen corresponding path program 8 times [2022-03-01 17:50:14,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:14,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197524026] [2022-03-01 17:50:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:15,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:15,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197524026] [2022-03-01 17:50:15,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197524026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:15,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665090191] [2022-03-01 17:50:15,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:15,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:15,121 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:15,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:50:15,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:15,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:15,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:15,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:15,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-01 17:50:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:15,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:15,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:50:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:15,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665090191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:15,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:15,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-03-01 17:50:15,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428190466] [2022-03-01 17:50:15,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:15,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:50:15,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:50:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:15,973 INFO L87 Difference]: Start difference. First operand 4994 states and 22038 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:17,492 INFO L93 Difference]: Finished difference Result 6950 states and 29032 transitions. [2022-03-01 17:50:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:50:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:17,509 INFO L225 Difference]: With dead ends: 6950 [2022-03-01 17:50:17,509 INFO L226 Difference]: Without dead ends: 6943 [2022-03-01 17:50:17,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=288, Invalid=2792, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:50:17,510 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 283 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:17,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 284 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2055 Invalid, 0 Unknown, 1012 Unchecked, 0.8s Time] [2022-03-01 17:50:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2022-03-01 17:50:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5475. [2022-03-01 17:50:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5474 states have (on average 4.370478626233102) internal successors, (23924), 5474 states have internal predecessors, (23924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 23924 transitions. [2022-03-01 17:50:17,610 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 23924 transitions. Word has length 30 [2022-03-01 17:50:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 23924 transitions. [2022-03-01 17:50:17,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 23924 transitions. [2022-03-01 17:50:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:17,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:17,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:17,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:17,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-03-01 17:50:17,826 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash -703434075, now seen corresponding path program 2 times [2022-03-01 17:50:17,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:17,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725567580] [2022-03-01 17:50:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:17,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:18,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:18,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725567580] [2022-03-01 17:50:18,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725567580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:18,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497248101] [2022-03-01 17:50:18,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:18,040 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:18,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:50:18,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:18,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:18,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:18,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-01 17:50:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:18,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:19,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:50:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:19,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497248101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:19,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:19,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-03-01 17:50:19,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374456920] [2022-03-01 17:50:19,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:19,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:50:19,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:19,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:50:19,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:19,037 INFO L87 Difference]: Start difference. First operand 5475 states and 23924 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:21,220 INFO L93 Difference]: Finished difference Result 7649 states and 32174 transitions. [2022-03-01 17:50:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:50:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:21,240 INFO L225 Difference]: With dead ends: 7649 [2022-03-01 17:50:21,240 INFO L226 Difference]: Without dead ends: 7587 [2022-03-01 17:50:21,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=401, Invalid=3759, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:50:21,241 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 540 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 4182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1617 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:21,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 249 Invalid, 4182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2443 Invalid, 0 Unknown, 1617 Unchecked, 1.0s Time] [2022-03-01 17:50:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2022-03-01 17:50:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 5342. [2022-03-01 17:50:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 4.389065718030332) internal successors, (23442), 5341 states have internal predecessors, (23442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 23442 transitions. [2022-03-01 17:50:21,345 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 23442 transitions. Word has length 30 [2022-03-01 17:50:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:21,345 INFO L470 AbstractCegarLoop]: Abstraction has 5342 states and 23442 transitions. [2022-03-01 17:50:21,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 23442 transitions. [2022-03-01 17:50:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:21,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:21,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:21,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:21,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:21,567 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1874833036, now seen corresponding path program 9 times [2022-03-01 17:50:21,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:21,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293359197] [2022-03-01 17:50:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:21,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293359197] [2022-03-01 17:50:21,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293359197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:21,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661941131] [2022-03-01 17:50:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:21,767 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:21,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:50:21,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:21,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:50:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:22,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:22,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:50:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:22,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:22,896 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:50:22,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:50:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661941131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:23,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:23,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-03-01 17:50:23,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067903214] [2022-03-01 17:50:23,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:23,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:50:23,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:50:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:23,047 INFO L87 Difference]: Start difference. First operand 5342 states and 23442 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:24,293 INFO L93 Difference]: Finished difference Result 6059 states and 25887 transitions. [2022-03-01 17:50:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:50:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:24,310 INFO L225 Difference]: With dead ends: 6059 [2022-03-01 17:50:24,310 INFO L226 Difference]: Without dead ends: 6052 [2022-03-01 17:50:24,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:50:24,311 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 166 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1599 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:24,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 237 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1571 Invalid, 0 Unknown, 1599 Unchecked, 0.7s Time] [2022-03-01 17:50:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2022-03-01 17:50:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 5463. [2022-03-01 17:50:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 4.370194068106921) internal successors, (23870), 5462 states have internal predecessors, (23870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 23870 transitions. [2022-03-01 17:50:24,427 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 23870 transitions. Word has length 30 [2022-03-01 17:50:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:24,427 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 23870 transitions. [2022-03-01 17:50:24,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 23870 transitions. [2022-03-01 17:50:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:24,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:24,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:24,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:24,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:24,653 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1846203885, now seen corresponding path program 3 times [2022-03-01 17:50:24,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:24,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480120702] [2022-03-01 17:50:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:24,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:24,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480120702] [2022-03-01 17:50:24,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480120702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:24,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085355296] [2022-03-01 17:50:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:24,843 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:24,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:50:24,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:50:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:25,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:25,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:25,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:50:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:25,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:25,831 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:50:25,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:50:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:25,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085355296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:25,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:25,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-03-01 17:50:25,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554216205] [2022-03-01 17:50:25,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:25,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:50:25,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:25,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:50:25,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:25,995 INFO L87 Difference]: Start difference. First operand 5463 states and 23870 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:27,144 INFO L93 Difference]: Finished difference Result 5905 states and 25415 transitions. [2022-03-01 17:50:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:50:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:27,159 INFO L225 Difference]: With dead ends: 5905 [2022-03-01 17:50:27,160 INFO L226 Difference]: Without dead ends: 5841 [2022-03-01 17:50:27,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:50:27,160 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 221 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1066 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:27,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 175 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1387 Invalid, 0 Unknown, 1066 Unchecked, 0.6s Time] [2022-03-01 17:50:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-03-01 17:50:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5512. [2022-03-01 17:50:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5512 states, 5511 states have (on average 4.365269461077844) internal successors, (24057), 5511 states have internal predecessors, (24057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 24057 transitions. [2022-03-01 17:50:27,255 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 24057 transitions. Word has length 30 [2022-03-01 17:50:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:27,255 INFO L470 AbstractCegarLoop]: Abstraction has 5512 states and 24057 transitions. [2022-03-01 17:50:27,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 24057 transitions. [2022-03-01 17:50:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:27,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:27,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:27,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-01 17:50:27,480 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1237621851, now seen corresponding path program 2 times [2022-03-01 17:50:27,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:27,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502783294] [2022-03-01 17:50:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:27,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:27,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502783294] [2022-03-01 17:50:27,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502783294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:27,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255277109] [2022-03-01 17:50:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:27,698 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:27,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:50:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:27,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:27,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-01 17:50:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:28,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:28,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:28,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:28,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:50:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:28,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255277109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:28,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:28,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-03-01 17:50:28,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233404790] [2022-03-01 17:50:28,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:28,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:50:28,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:50:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:28,554 INFO L87 Difference]: Start difference. First operand 5512 states and 24057 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:30,653 INFO L93 Difference]: Finished difference Result 7638 states and 32201 transitions. [2022-03-01 17:50:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:50:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:30,673 INFO L225 Difference]: With dead ends: 7638 [2022-03-01 17:50:30,673 INFO L226 Difference]: Without dead ends: 7571 [2022-03-01 17:50:30,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=337, Invalid=3203, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:50:30,674 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 390 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 4839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1667 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:30,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 291 Invalid, 4839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3079 Invalid, 0 Unknown, 1667 Unchecked, 1.1s Time] [2022-03-01 17:50:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2022-03-01 17:50:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 5355. [2022-03-01 17:50:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 5354 states have (on average 4.367575644378035) internal successors, (23384), 5354 states have internal predecessors, (23384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 23384 transitions. [2022-03-01 17:50:30,802 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 23384 transitions. Word has length 30 [2022-03-01 17:50:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:30,802 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 23384 transitions. [2022-03-01 17:50:30,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 23384 transitions. [2022-03-01 17:50:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:30,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:30,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:30,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:31,015 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1984260065, now seen corresponding path program 3 times [2022-03-01 17:50:31,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:31,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072195526] [2022-03-01 17:50:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:31,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:31,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:31,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072195526] [2022-03-01 17:50:31,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072195526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:31,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333208866] [2022-03-01 17:50:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:31,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:31,237 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:31,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:50:31,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:50:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:31,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:31,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:31,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:50:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:31,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:32,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:32,305 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:50:32,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:50:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333208866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:32,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:32,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-03-01 17:50:32,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877940475] [2022-03-01 17:50:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:32,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:50:32,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:50:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:32,418 INFO L87 Difference]: Start difference. First operand 5355 states and 23384 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:33,485 INFO L93 Difference]: Finished difference Result 5770 states and 24861 transitions. [2022-03-01 17:50:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:50:33,485 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:33,500 INFO L225 Difference]: With dead ends: 5770 [2022-03-01 17:50:33,500 INFO L226 Difference]: Without dead ends: 5755 [2022-03-01 17:50:33,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:50:33,501 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:33,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 229 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1551 Invalid, 0 Unknown, 1287 Unchecked, 0.6s Time] [2022-03-01 17:50:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-03-01 17:50:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5350. [2022-03-01 17:50:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 5349 states have (on average 4.369040942232193) internal successors, (23370), 5349 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 23370 transitions. [2022-03-01 17:50:33,663 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 23370 transitions. Word has length 30 [2022-03-01 17:50:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:33,663 INFO L470 AbstractCegarLoop]: Abstraction has 5350 states and 23370 transitions. [2022-03-01 17:50:33,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 23370 transitions. [2022-03-01 17:50:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:33,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:33,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:33,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:33,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:33,883 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1428009473, now seen corresponding path program 28 times [2022-03-01 17:50:33,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:33,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948463902] [2022-03-01 17:50:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:34,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948463902] [2022-03-01 17:50:34,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948463902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:34,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296871163] [2022-03-01 17:50:34,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:34,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:34,044 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:34,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:50:34,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:34,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:34,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 17:50:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:34,496 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:34,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:50:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296871163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:34,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:34,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:50:34,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245740175] [2022-03-01 17:50:34,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:34,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:50:34,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:50:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:50:34,564 INFO L87 Difference]: Start difference. First operand 5350 states and 23370 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:36,456 INFO L93 Difference]: Finished difference Result 7293 states and 31295 transitions. [2022-03-01 17:50:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:50:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:36,475 INFO L225 Difference]: With dead ends: 7293 [2022-03-01 17:50:36,475 INFO L226 Difference]: Without dead ends: 7272 [2022-03-01 17:50:36,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=508, Invalid=3398, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:50:36,476 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 481 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:36,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 216 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 3792 Invalid, 0 Unknown, 25 Unchecked, 1.1s Time] [2022-03-01 17:50:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2022-03-01 17:50:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 5344. [2022-03-01 17:50:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5344 states, 5343 states have (on average 4.371139809096014) internal successors, (23355), 5343 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 23355 transitions. [2022-03-01 17:50:36,619 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 23355 transitions. Word has length 30 [2022-03-01 17:50:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:36,619 INFO L470 AbstractCegarLoop]: Abstraction has 5344 states and 23355 transitions. [2022-03-01 17:50:36,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 23355 transitions. [2022-03-01 17:50:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:36,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:36,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:36,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:36,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:36,843 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1019046356, now seen corresponding path program 10 times [2022-03-01 17:50:36,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:36,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598107858] [2022-03-01 17:50:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:37,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598107858] [2022-03-01 17:50:37,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598107858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:37,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854670274] [2022-03-01 17:50:37,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:37,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:37,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:37,023 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:37,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:50:37,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:37,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:37,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:37,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:37,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:37,568 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:37,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:37,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:37,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:37,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:37,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:37,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854670274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:37,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:37,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:50:37,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388271325] [2022-03-01 17:50:37,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:50:37,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:50:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:37,640 INFO L87 Difference]: Start difference. First operand 5344 states and 23355 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:38,506 INFO L93 Difference]: Finished difference Result 6188 states and 26568 transitions. [2022-03-01 17:50:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:50:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:38,523 INFO L225 Difference]: With dead ends: 6188 [2022-03-01 17:50:38,523 INFO L226 Difference]: Without dead ends: 6100 [2022-03-01 17:50:38,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:38,524 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:38,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 133 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1488 Invalid, 0 Unknown, 469 Unchecked, 0.5s Time] [2022-03-01 17:50:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2022-03-01 17:50:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 5370. [2022-03-01 17:50:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 4.369901285155523) internal successors, (23462), 5369 states have internal predecessors, (23462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 23462 transitions. [2022-03-01 17:50:38,661 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 23462 transitions. Word has length 30 [2022-03-01 17:50:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 5370 states and 23462 transitions. [2022-03-01 17:50:38,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 23462 transitions. [2022-03-01 17:50:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:38,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:38,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:38,883 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1289693116, now seen corresponding path program 11 times [2022-03-01 17:50:38,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:38,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402436198] [2022-03-01 17:50:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402436198] [2022-03-01 17:50:39,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402436198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:39,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928606943] [2022-03-01 17:50:39,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:39,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:39,097 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:39,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:50:39,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:39,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:39,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:39,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:39,779 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:39,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:39,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928606943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:39,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:39,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:50:39,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468953469] [2022-03-01 17:50:39,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:39,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:50:39,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:50:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:39,859 INFO L87 Difference]: Start difference. First operand 5370 states and 23462 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,809 INFO L93 Difference]: Finished difference Result 6934 states and 29268 transitions. [2022-03-01 17:50:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:50:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,826 INFO L225 Difference]: With dead ends: 6934 [2022-03-01 17:50:40,826 INFO L226 Difference]: Without dead ends: 6844 [2022-03-01 17:50:40,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:50:40,827 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 246 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:40,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 177 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1468 Invalid, 0 Unknown, 603 Unchecked, 0.6s Time] [2022-03-01 17:50:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-03-01 17:50:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5456. [2022-03-01 17:50:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 4.363886342804766) internal successors, (23805), 5455 states have internal predecessors, (23805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 23805 transitions. [2022-03-01 17:50:40,930 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 23805 transitions. Word has length 30 [2022-03-01 17:50:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 5456 states and 23805 transitions. [2022-03-01 17:50:40,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 23805 transitions. [2022-03-01 17:50:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:40,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:40,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:41,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-01 17:50:41,164 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash 85442831, now seen corresponding path program 4 times [2022-03-01 17:50:41,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357545635] [2022-03-01 17:50:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357545635] [2022-03-01 17:50:41,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357545635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:41,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207522578] [2022-03-01 17:50:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:41,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:41,447 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:41,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:50:41,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:41,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:41,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:41,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:41,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:41,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:41,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:42,063 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:42,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:42,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:42,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:42,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207522578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:42,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:42,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:50:42,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994479639] [2022-03-01 17:50:42,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:42,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:50:42,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:50:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:42,119 INFO L87 Difference]: Start difference. First operand 5456 states and 23805 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:43,242 INFO L93 Difference]: Finished difference Result 6761 states and 28679 transitions. [2022-03-01 17:50:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:43,258 INFO L225 Difference]: With dead ends: 6761 [2022-03-01 17:50:43,259 INFO L226 Difference]: Without dead ends: 6643 [2022-03-01 17:50:43,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:50:43,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:43,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 162 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1896 Invalid, 0 Unknown, 425 Unchecked, 0.7s Time] [2022-03-01 17:50:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-03-01 17:50:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 5406. [2022-03-01 17:50:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 4.372432932469935) internal successors, (23633), 5405 states have internal predecessors, (23633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 23633 transitions. [2022-03-01 17:50:43,356 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 23633 transitions. Word has length 30 [2022-03-01 17:50:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:43,356 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 23633 transitions. [2022-03-01 17:50:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 23633 transitions. [2022-03-01 17:50:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:43,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:43,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:43,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 17:50:43,579 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -235668790, now seen corresponding path program 12 times [2022-03-01 17:50:43,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:43,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614199774] [2022-03-01 17:50:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:43,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614199774] [2022-03-01 17:50:43,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614199774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:43,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499179275] [2022-03-01 17:50:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:43,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:43,737 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:43,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:50:43,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:50:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:43,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:43,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:50:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:44,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:44,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:44,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:50:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:44,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499179275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:44,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:44,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:50:44,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001597462] [2022-03-01 17:50:44,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:44,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:50:44,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:50:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:44,794 INFO L87 Difference]: Start difference. First operand 5406 states and 23633 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:46,197 INFO L93 Difference]: Finished difference Result 6784 states and 28591 transitions. [2022-03-01 17:50:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:50:46,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:46,215 INFO L225 Difference]: With dead ends: 6784 [2022-03-01 17:50:46,215 INFO L226 Difference]: Without dead ends: 6616 [2022-03-01 17:50:46,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:50:46,216 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 401 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1485 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:46,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 139 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 778 Invalid, 0 Unknown, 1485 Unchecked, 0.4s Time] [2022-03-01 17:50:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2022-03-01 17:50:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 5548. [2022-03-01 17:50:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5548 states, 5547 states have (on average 4.361456643230575) internal successors, (24193), 5547 states have internal predecessors, (24193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 24193 transitions. [2022-03-01 17:50:46,320 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 24193 transitions. Word has length 30 [2022-03-01 17:50:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:46,321 INFO L470 AbstractCegarLoop]: Abstraction has 5548 states and 24193 transitions. [2022-03-01 17:50:46,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 24193 transitions. [2022-03-01 17:50:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:46,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:46,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:46,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-01 17:50:46,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-01 17:50:46,548 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788194, now seen corresponding path program 1 times [2022-03-01 17:50:46,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:46,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823058362] [2022-03-01 17:50:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:46,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823058362] [2022-03-01 17:50:46,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823058362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:46,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544619660] [2022-03-01 17:50:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:46,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:46,741 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:46,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:50:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:47,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:47,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:47,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:47,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:47,388 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:47,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:47,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:47,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544619660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:47,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:47,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:50:47,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183400638] [2022-03-01 17:50:47,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:47,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:50:47,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:50:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:47,477 INFO L87 Difference]: Start difference. First operand 5548 states and 24193 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:48,641 INFO L93 Difference]: Finished difference Result 6640 states and 28372 transitions. [2022-03-01 17:50:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:50:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:48,659 INFO L225 Difference]: With dead ends: 6640 [2022-03-01 17:50:48,659 INFO L226 Difference]: Without dead ends: 6574 [2022-03-01 17:50:48,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:48,668 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:48,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 250 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2088 Invalid, 0 Unknown, 844 Unchecked, 0.8s Time] [2022-03-01 17:50:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6574 states. [2022-03-01 17:50:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6574 to 5746. [2022-03-01 17:50:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 4.337859007832898) internal successors, (24921), 5745 states have internal predecessors, (24921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 24921 transitions. [2022-03-01 17:50:48,775 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 24921 transitions. Word has length 30 [2022-03-01 17:50:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 5746 states and 24921 transitions. [2022-03-01 17:50:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 24921 transitions. [2022-03-01 17:50:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:48,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:48,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:48,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:49,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,002 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1863518227, now seen corresponding path program 1 times [2022-03-01 17:50:49,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:49,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424541155] [2022-03-01 17:50:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:49,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:49,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424541155] [2022-03-01 17:50:49,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424541155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:49,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931649691] [2022-03-01 17:50:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:49,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:49,234 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:50:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:49,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:50:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:49,836 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:49,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:49,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:49,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931649691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:49,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:49,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:50:49,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21875272] [2022-03-01 17:50:49,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:49,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:50:49,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:50:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:49,921 INFO L87 Difference]: Start difference. First operand 5746 states and 24921 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:50,978 INFO L93 Difference]: Finished difference Result 6708 states and 28662 transitions. [2022-03-01 17:50:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:50:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:50,997 INFO L225 Difference]: With dead ends: 6708 [2022-03-01 17:50:50,997 INFO L226 Difference]: Without dead ends: 6628 [2022-03-01 17:50:50,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:50,998 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 155 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1619 Invalid, 0 Unknown, 519 Unchecked, 0.7s Time] [2022-03-01 17:50:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2022-03-01 17:50:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 5792. [2022-03-01 17:50:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.336211362458988) internal successors, (25111), 5791 states have internal predecessors, (25111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25111 transitions. [2022-03-01 17:50:51,105 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25111 transitions. Word has length 30 [2022-03-01 17:50:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:51,105 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25111 transitions. [2022-03-01 17:50:51,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25111 transitions. [2022-03-01 17:50:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:51,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:51,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:51,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:51,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,335 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2134164987, now seen corresponding path program 2 times [2022-03-01 17:50:51,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:51,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889464661] [2022-03-01 17:50:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:51,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889464661] [2022-03-01 17:50:51,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889464661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:51,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530846308] [2022-03-01 17:50:51,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:51,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:51,507 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:51,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:50:51,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:51,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:51,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:51,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:51,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:51,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:51,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-03-01 17:50:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:52,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:50:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530846308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:52,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:52,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:50:52,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530649763] [2022-03-01 17:50:52,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:52,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:50:52,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:52,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:50:52,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:52,370 INFO L87 Difference]: Start difference. First operand 5792 states and 25111 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:53,805 INFO L93 Difference]: Finished difference Result 8699 states and 36222 transitions. [2022-03-01 17:50:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:50:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:53,826 INFO L225 Difference]: With dead ends: 8699 [2022-03-01 17:50:53,826 INFO L226 Difference]: Without dead ends: 8608 [2022-03-01 17:50:53,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=514, Invalid=3518, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:50:53,847 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 554 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2338 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:53,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 219 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1515 Invalid, 0 Unknown, 2338 Unchecked, 0.5s Time] [2022-03-01 17:50:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2022-03-01 17:50:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 5749. [2022-03-01 17:50:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5748 states have (on average 4.340118302018094) internal successors, (24947), 5748 states have internal predecessors, (24947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 24947 transitions. [2022-03-01 17:50:54,104 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 24947 transitions. Word has length 30 [2022-03-01 17:50:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:54,104 INFO L470 AbstractCegarLoop]: Abstraction has 5749 states and 24947 transitions. [2022-03-01 17:50:54,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 24947 transitions. [2022-03-01 17:50:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:54,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:54,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:54,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:54,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:54,315 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 355111619, now seen corresponding path program 3 times [2022-03-01 17:50:54,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:54,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650769820] [2022-03-01 17:50:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:54,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:54,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:54,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650769820] [2022-03-01 17:50:54,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650769820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:54,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703236214] [2022-03-01 17:50:54,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:54,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:54,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:54,480 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:54,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:50:54,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:50:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:54,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:54,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:50:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:54,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:55,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:55,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:50:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:55,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703236214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:55,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:55,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 17:50:55,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619754361] [2022-03-01 17:50:55,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:50:55,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:50:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:55,406 INFO L87 Difference]: Start difference. First operand 5749 states and 24947 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:57,130 INFO L93 Difference]: Finished difference Result 7774 states and 32448 transitions. [2022-03-01 17:50:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:50:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:57,149 INFO L225 Difference]: With dead ends: 7774 [2022-03-01 17:50:57,149 INFO L226 Difference]: Without dead ends: 7675 [2022-03-01 17:50:57,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=422, Invalid=3238, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:50:57,150 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 4794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1811 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:57,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 275 Invalid, 4794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2866 Invalid, 0 Unknown, 1811 Unchecked, 0.9s Time] [2022-03-01 17:50:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7675 states. [2022-03-01 17:50:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7675 to 5656. [2022-03-01 17:50:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.354022988505747) internal successors, (24622), 5655 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24622 transitions. [2022-03-01 17:50:57,255 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24622 transitions. Word has length 30 [2022-03-01 17:50:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:57,255 INFO L470 AbstractCegarLoop]: Abstraction has 5656 states and 24622 transitions. [2022-03-01 17:50:57,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24622 transitions. [2022-03-01 17:50:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:57,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:57,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:57,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:57,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:57,480 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2017522460, now seen corresponding path program 13 times [2022-03-01 17:50:57,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:57,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672308316] [2022-03-01 17:50:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:57,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:57,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672308316] [2022-03-01 17:50:57,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672308316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:57,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770767995] [2022-03-01 17:50:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:57,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:57,692 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:57,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:50:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:57,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:57,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:57,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:57,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:50:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:58,296 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:50:58,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:50:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:58,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:58,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:50:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770767995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:58,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:58,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:50:58,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143874808] [2022-03-01 17:50:58,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:58,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:50:58,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:50:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:58,382 INFO L87 Difference]: Start difference. First operand 5656 states and 24622 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:59,216 INFO L93 Difference]: Finished difference Result 6618 states and 28362 transitions. [2022-03-01 17:50:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:50:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:59,233 INFO L225 Difference]: With dead ends: 6618 [2022-03-01 17:50:59,233 INFO L226 Difference]: Without dead ends: 6560 [2022-03-01 17:50:59,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:50:59,233 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:59,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 148 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1351 Invalid, 0 Unknown, 631 Unchecked, 0.5s Time] [2022-03-01 17:50:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2022-03-01 17:50:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 5259. [2022-03-01 17:50:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 5258 states have (on average 4.386268543172309) internal successors, (23063), 5258 states have internal predecessors, (23063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 23063 transitions. [2022-03-01 17:50:59,326 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 23063 transitions. Word has length 30 [2022-03-01 17:50:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 5259 states and 23063 transitions. [2022-03-01 17:50:59,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 23063 transitions. [2022-03-01 17:50:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:50:59,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:59,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:59,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:59,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:59,551 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1776242996, now seen corresponding path program 14 times [2022-03-01 17:50:59,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:59,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264964304] [2022-03-01 17:50:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:59,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:59,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264964304] [2022-03-01 17:50:59,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264964304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:59,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111012084] [2022-03-01 17:50:59,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:59,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:59,768 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:59,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:50:59,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:50:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:00,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:00,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:00,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:51:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:00,391 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:00,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:00,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:00,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111012084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:00,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:00,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:51:00,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150031171] [2022-03-01 17:51:00,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:00,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:00,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:00,451 INFO L87 Difference]: Start difference. First operand 5259 states and 23063 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:01,450 INFO L93 Difference]: Finished difference Result 6228 states and 26789 transitions. [2022-03-01 17:51:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:51:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:01,466 INFO L225 Difference]: With dead ends: 6228 [2022-03-01 17:51:01,466 INFO L226 Difference]: Without dead ends: 6142 [2022-03-01 17:51:01,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:01,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:01,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 161 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1639 Invalid, 0 Unknown, 347 Unchecked, 0.6s Time] [2022-03-01 17:51:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2022-03-01 17:51:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 5252. [2022-03-01 17:51:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5252 states, 5251 states have (on average 4.382974671491144) internal successors, (23015), 5251 states have internal predecessors, (23015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 23015 transitions. [2022-03-01 17:51:01,558 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 23015 transitions. Word has length 30 [2022-03-01 17:51:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:01,558 INFO L470 AbstractCegarLoop]: Abstraction has 5252 states and 23015 transitions. [2022-03-01 17:51:01,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 23015 transitions. [2022-03-01 17:51:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:01,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:01,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:01,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:01,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:01,783 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1846353032, now seen corresponding path program 15 times [2022-03-01 17:51:01,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:01,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002093434] [2022-03-01 17:51:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:01,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:01,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002093434] [2022-03-01 17:51:01,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002093434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:01,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018444088] [2022-03-01 17:51:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:01,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:01,977 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:01,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:51:02,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:51:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:02,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:02,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:02,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:51:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:02,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:02,895 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:51:02,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:51:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:03,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018444088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:03,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:03,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 17:51:03,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210677666] [2022-03-01 17:51:03,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:03,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:03,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:03,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:03,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:03,028 INFO L87 Difference]: Start difference. First operand 5252 states and 23015 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:05,354 INFO L93 Difference]: Finished difference Result 6624 states and 28122 transitions. [2022-03-01 17:51:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:51:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:05,370 INFO L225 Difference]: With dead ends: 6624 [2022-03-01 17:51:05,370 INFO L226 Difference]: Without dead ends: 6498 [2022-03-01 17:51:05,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:51:05,371 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1155 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:05,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 168 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2080 Invalid, 0 Unknown, 1155 Unchecked, 0.9s Time] [2022-03-01 17:51:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6498 states. [2022-03-01 17:51:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6498 to 5338. [2022-03-01 17:51:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 4.3805508712759975) internal successors, (23379), 5337 states have internal predecessors, (23379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 23379 transitions. [2022-03-01 17:51:05,471 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 23379 transitions. Word has length 30 [2022-03-01 17:51:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:05,472 INFO L470 AbstractCegarLoop]: Abstraction has 5338 states and 23379 transitions. [2022-03-01 17:51:05,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 23379 transitions. [2022-03-01 17:51:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:05,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:05,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:05,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:05,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:05,697 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 557205232, now seen corresponding path program 16 times [2022-03-01 17:51:05,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:05,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992441671] [2022-03-01 17:51:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:05,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:05,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:05,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992441671] [2022-03-01 17:51:05,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992441671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:05,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846408028] [2022-03-01 17:51:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:05,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:06,000 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:06,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:51:06,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:06,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:06,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:06,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:51:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:06,707 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:06,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:06,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:06,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:06,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:06,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846408028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:06,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:06,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:51:06,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292650735] [2022-03-01 17:51:06,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:06,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:06,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:06,793 INFO L87 Difference]: Start difference. First operand 5338 states and 23379 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:08,276 INFO L93 Difference]: Finished difference Result 6752 states and 28904 transitions. [2022-03-01 17:51:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:51:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:08,294 INFO L225 Difference]: With dead ends: 6752 [2022-03-01 17:51:08,294 INFO L226 Difference]: Without dead ends: 6630 [2022-03-01 17:51:08,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:51:08,295 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 328 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:08,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 198 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2382 Invalid, 0 Unknown, 703 Unchecked, 0.9s Time] [2022-03-01 17:51:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2022-03-01 17:51:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 4930. [2022-03-01 17:51:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4929 states have (on average 4.429498884155001) internal successors, (21833), 4929 states have internal predecessors, (21833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 21833 transitions. [2022-03-01 17:51:08,390 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 21833 transitions. Word has length 30 [2022-03-01 17:51:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:08,390 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 21833 transitions. [2022-03-01 17:51:08,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 21833 transitions. [2022-03-01 17:51:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:08,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:08,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:08,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:08,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:08,614 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1982940592, now seen corresponding path program 17 times [2022-03-01 17:51:08,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:08,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461534850] [2022-03-01 17:51:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:08,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:08,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461534850] [2022-03-01 17:51:08,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461534850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:08,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797491696] [2022-03-01 17:51:08,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:08,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:08,783 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:08,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:51:08,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:09,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:09,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:09,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:51:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:09,245 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:09,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:09,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:09,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797491696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:09,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:09,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:51:09,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933041930] [2022-03-01 17:51:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:09,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:51:09,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:51:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:51:09,310 INFO L87 Difference]: Start difference. First operand 4930 states and 21833 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:10,117 INFO L93 Difference]: Finished difference Result 5927 states and 25713 transitions. [2022-03-01 17:51:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:51:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:10,133 INFO L225 Difference]: With dead ends: 5927 [2022-03-01 17:51:10,133 INFO L226 Difference]: Without dead ends: 5854 [2022-03-01 17:51:10,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:10,134 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:10,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 183 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1757 Invalid, 0 Unknown, 380 Unchecked, 0.5s Time] [2022-03-01 17:51:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2022-03-01 17:51:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 5012. [2022-03-01 17:51:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 5011 states have (on average 4.422869686689284) internal successors, (22163), 5011 states have internal predecessors, (22163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 22163 transitions. [2022-03-01 17:51:10,285 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 22163 transitions. Word has length 30 [2022-03-01 17:51:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:10,285 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 22163 transitions. [2022-03-01 17:51:10,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 22163 transitions. [2022-03-01 17:51:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:10,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:10,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:10,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:51:10,508 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2094934263, now seen corresponding path program 4 times [2022-03-01 17:51:10,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:10,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893741287] [2022-03-01 17:51:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:10,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893741287] [2022-03-01 17:51:10,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893741287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:10,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822475869] [2022-03-01 17:51:10,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:10,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:10,740 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:10,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:51:10,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:10,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:51:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:11,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:11,405 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:11,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:11,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:11,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:11,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822475869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:11,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:11,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:51:11,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143028663] [2022-03-01 17:51:11,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:11,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:51:11,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:51:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:51:11,497 INFO L87 Difference]: Start difference. First operand 5012 states and 22163 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:12,480 INFO L93 Difference]: Finished difference Result 5894 states and 25578 transitions. [2022-03-01 17:51:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:51:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:12,496 INFO L225 Difference]: With dead ends: 5894 [2022-03-01 17:51:12,496 INFO L226 Difference]: Without dead ends: 5819 [2022-03-01 17:51:12,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:51:12,496 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:12,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 149 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1731 Invalid, 0 Unknown, 496 Unchecked, 0.7s Time] [2022-03-01 17:51:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2022-03-01 17:51:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 4619. [2022-03-01 17:51:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 4618 states have (on average 4.467085318319619) internal successors, (20629), 4618 states have internal predecessors, (20629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 20629 transitions. [2022-03-01 17:51:12,588 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 20629 transitions. Word has length 30 [2022-03-01 17:51:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:12,588 INFO L470 AbstractCegarLoop]: Abstraction has 4619 states and 20629 transitions. [2022-03-01 17:51:12,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 20629 transitions. [2022-03-01 17:51:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:12,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:12,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:12,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:12,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:12,811 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1596110067, now seen corresponding path program 68 times [2022-03-01 17:51:12,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:12,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488773337] [2022-03-01 17:51:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:13,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:13,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488773337] [2022-03-01 17:51:13,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488773337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:13,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770505747] [2022-03-01 17:51:13,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:13,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:13,057 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:13,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:51:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:13,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 17:51:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:13,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:13,724 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:13,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:13,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:13,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770505747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:13,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:13,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:51:13,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148765364] [2022-03-01 17:51:13,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:13,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:13,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:13,814 INFO L87 Difference]: Start difference. First operand 4619 states and 20629 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:15,620 INFO L93 Difference]: Finished difference Result 5261 states and 23179 transitions. [2022-03-01 17:51:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:51:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:15,632 INFO L225 Difference]: With dead ends: 5261 [2022-03-01 17:51:15,632 INFO L226 Difference]: Without dead ends: 5212 [2022-03-01 17:51:15,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:51:15,632 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 211 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:15,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 160 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1910 Invalid, 0 Unknown, 660 Unchecked, 0.7s Time] [2022-03-01 17:51:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2022-03-01 17:51:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 4670. [2022-03-01 17:51:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.460484043692439) internal successors, (20826), 4669 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 20826 transitions. [2022-03-01 17:51:15,756 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 20826 transitions. Word has length 30 [2022-03-01 17:51:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 4670 states and 20826 transitions. [2022-03-01 17:51:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 20826 transitions. [2022-03-01 17:51:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:15,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:15,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:15,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:15,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-01 17:51:15,966 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 412678609, now seen corresponding path program 69 times [2022-03-01 17:51:15,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:15,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555014815] [2022-03-01 17:51:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:16,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555014815] [2022-03-01 17:51:16,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555014815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918843501] [2022-03-01 17:51:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:16,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:16,211 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:16,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:51:16,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:51:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:16,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:16,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:16,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 64 [2022-03-01 17:51:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:22,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:23,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:23,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 9 [2022-03-01 17:51:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:23,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918843501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:23,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:23,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:51:23,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411987420] [2022-03-01 17:51:23,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:23,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:23,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:23,475 INFO L87 Difference]: Start difference. First operand 4670 states and 20826 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:34,870 INFO L93 Difference]: Finished difference Result 6025 states and 26166 transitions. [2022-03-01 17:51:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:51:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:34,885 INFO L225 Difference]: With dead ends: 6025 [2022-03-01 17:51:34,885 INFO L226 Difference]: Without dead ends: 5881 [2022-03-01 17:51:34,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=672, Invalid=5647, Unknown=1, NotChecked=0, Total=6320 [2022-03-01 17:51:34,886 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 523 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:34,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 262 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2839 Invalid, 0 Unknown, 1085 Unchecked, 1.6s Time] [2022-03-01 17:51:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2022-03-01 17:51:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 4691. [2022-03-01 17:51:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 4.454797441364605) internal successors, (20893), 4690 states have internal predecessors, (20893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 20893 transitions. [2022-03-01 17:51:34,977 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 20893 transitions. Word has length 30 [2022-03-01 17:51:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:34,977 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 20893 transitions. [2022-03-01 17:51:34,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 20893 transitions. [2022-03-01 17:51:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:34,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:34,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:35,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:51:35,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:51:35,199 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash -311430757, now seen corresponding path program 70 times [2022-03-01 17:51:35,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:35,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344330045] [2022-03-01 17:51:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:35,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:35,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344330045] [2022-03-01 17:51:35,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344330045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:35,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246617059] [2022-03-01 17:51:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:35,340 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:35,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:51:35,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:35,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:35,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:35,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:51:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:35,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:35,874 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:35,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:35,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:35,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:35,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:35,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:36,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246617059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:36,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:36,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:51:36,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813405807] [2022-03-01 17:51:36,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:36,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:36,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:36,001 INFO L87 Difference]: Start difference. First operand 4691 states and 20893 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:36,732 INFO L93 Difference]: Finished difference Result 5439 states and 23837 transitions. [2022-03-01 17:51:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:51:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:36,746 INFO L225 Difference]: With dead ends: 5439 [2022-03-01 17:51:36,747 INFO L226 Difference]: Without dead ends: 5388 [2022-03-01 17:51:36,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:51:36,747 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:36,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 170 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1477 Invalid, 0 Unknown, 428 Unchecked, 0.5s Time] [2022-03-01 17:51:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2022-03-01 17:51:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4717. [2022-03-01 17:51:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 4716 states have (on average 4.457379134860051) internal successors, (21021), 4716 states have internal predecessors, (21021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 21021 transitions. [2022-03-01 17:51:36,833 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 21021 transitions. Word has length 30 [2022-03-01 17:51:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:36,833 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 21021 transitions. [2022-03-01 17:51:36,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 21021 transitions. [2022-03-01 17:51:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:36,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:36,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:36,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:51:37,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-03-01 17:51:37,057 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -982863326, now seen corresponding path program 18 times [2022-03-01 17:51:37,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:37,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102148600] [2022-03-01 17:51:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102148600] [2022-03-01 17:51:37,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102148600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909210857] [2022-03-01 17:51:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:37,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:37,230 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:37,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:51:37,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:37,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:37,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2022-03-01 17:51:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:38,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:38,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:38,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:51:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:38,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909210857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:38,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:38,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:51:38,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038254446] [2022-03-01 17:51:38,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:38,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:51:38,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:51:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:38,060 INFO L87 Difference]: Start difference. First operand 4717 states and 21021 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:43,225 INFO L93 Difference]: Finished difference Result 8378 states and 34720 transitions. [2022-03-01 17:51:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 17:51:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:43,246 INFO L225 Difference]: With dead ends: 8378 [2022-03-01 17:51:43,246 INFO L226 Difference]: Without dead ends: 8212 [2022-03-01 17:51:43,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1152, Invalid=9768, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 17:51:43,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 904 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 5331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:43,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 284 Invalid, 5331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 4294 Invalid, 0 Unknown, 680 Unchecked, 2.0s Time] [2022-03-01 17:51:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-03-01 17:51:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 4775. [2022-03-01 17:51:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 4.462295768747381) internal successors, (21303), 4774 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 21303 transitions. [2022-03-01 17:51:43,353 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 21303 transitions. Word has length 30 [2022-03-01 17:51:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:43,353 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 21303 transitions. [2022-03-01 17:51:43,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 21303 transitions. [2022-03-01 17:51:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:43,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:43,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:43,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:51:43,562 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1905477006, now seen corresponding path program 19 times [2022-03-01 17:51:43,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:43,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255305743] [2022-03-01 17:51:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:43,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:43,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:43,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255305743] [2022-03-01 17:51:43,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255305743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:43,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596545168] [2022-03-01 17:51:43,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:43,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:43,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:43,779 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:43,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:51:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:44,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:51:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:44,269 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:44,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:44,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:44,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:51:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596545168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:44,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:44,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:51:44,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318399527] [2022-03-01 17:51:44,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:51:44,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:51:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:51:44,333 INFO L87 Difference]: Start difference. First operand 4775 states and 21303 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:45,290 INFO L93 Difference]: Finished difference Result 5403 states and 23774 transitions. [2022-03-01 17:51:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:51:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:45,304 INFO L225 Difference]: With dead ends: 5403 [2022-03-01 17:51:45,304 INFO L226 Difference]: Without dead ends: 5330 [2022-03-01 17:51:45,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:45,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:45,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 135 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1958 Invalid, 0 Unknown, 639 Unchecked, 0.6s Time] [2022-03-01 17:51:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2022-03-01 17:51:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 4785. [2022-03-01 17:51:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4784 states have (on average 4.461747491638796) internal successors, (21345), 4784 states have internal predecessors, (21345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 21345 transitions. [2022-03-01 17:51:45,414 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 21345 transitions. Word has length 30 [2022-03-01 17:51:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:45,414 INFO L470 AbstractCegarLoop]: Abstraction has 4785 states and 21345 transitions. [2022-03-01 17:51:45,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 21345 transitions. [2022-03-01 17:51:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:45,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:45,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:45,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:51:45,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:45,637 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -425123554, now seen corresponding path program 20 times [2022-03-01 17:51:45,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:45,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778581809] [2022-03-01 17:51:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:45,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:45,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778581809] [2022-03-01 17:51:45,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778581809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:45,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872327448] [2022-03-01 17:51:45,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:45,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:45,797 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:45,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:51:45,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:45,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:51:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:46,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:46,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-03-01 17:51:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:46,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:46,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:46,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:46,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-03-01 17:51:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872327448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:46,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:46,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 17:51:46,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189804063] [2022-03-01 17:51:46,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:46,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:46,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:46,757 INFO L87 Difference]: Start difference. First operand 4785 states and 21345 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:50,006 INFO L93 Difference]: Finished difference Result 7055 states and 30342 transitions. [2022-03-01 17:51:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:51:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:50,024 INFO L225 Difference]: With dead ends: 7055 [2022-03-01 17:51:50,024 INFO L226 Difference]: Without dead ends: 6762 [2022-03-01 17:51:50,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=759, Invalid=5561, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:51:50,025 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 423 mSDsluCounter, 2281 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2395 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:50,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 245 Invalid, 5271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2742 Invalid, 0 Unknown, 2395 Unchecked, 1.1s Time] [2022-03-01 17:51:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6762 states. [2022-03-01 17:51:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6762 to 4808. [2022-03-01 17:51:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 4807 states have (on average 4.4632827127106305) internal successors, (21455), 4807 states have internal predecessors, (21455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 21455 transitions. [2022-03-01 17:51:50,123 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 21455 transitions. Word has length 30 [2022-03-01 17:51:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:50,124 INFO L470 AbstractCegarLoop]: Abstraction has 4808 states and 21455 transitions. [2022-03-01 17:51:50,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 21455 transitions. [2022-03-01 17:51:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:50,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:50,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:50,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-01 17:51:50,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-01 17:51:50,335 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -716705075, now seen corresponding path program 71 times [2022-03-01 17:51:50,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:50,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870441389] [2022-03-01 17:51:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:50,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:50,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870441389] [2022-03-01 17:51:50,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870441389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:50,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348189324] [2022-03-01 17:51:50,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:50,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:50,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:50,549 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:50,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:51:50,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:51:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:50,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:50,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:50,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-03-01 17:51:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:51,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:51:51,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:51,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2022-03-01 17:51:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348189324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:51,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:51,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 17:51:51,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793618531] [2022-03-01 17:51:51,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:51,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:51:51,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:51:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:51,147 INFO L87 Difference]: Start difference. First operand 4808 states and 21455 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:53,512 INFO L93 Difference]: Finished difference Result 7279 states and 31525 transitions. [2022-03-01 17:51:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:51:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:53,530 INFO L225 Difference]: With dead ends: 7279 [2022-03-01 17:51:53,530 INFO L226 Difference]: Without dead ends: 7048 [2022-03-01 17:51:53,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=607, Invalid=3949, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:51:53,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 550 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:53,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 224 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3130 Invalid, 0 Unknown, 784 Unchecked, 1.2s Time] [2022-03-01 17:51:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2022-03-01 17:51:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 4906. [2022-03-01 17:51:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 4.4650356778797144) internal successors, (21901), 4905 states have internal predecessors, (21901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 21901 transitions. [2022-03-01 17:51:53,630 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 21901 transitions. Word has length 30 [2022-03-01 17:51:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:53,630 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 21901 transitions. [2022-03-01 17:51:53,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 21901 transitions. [2022-03-01 17:51:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:53,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:53,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:53,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:53,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:53,843 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1388137644, now seen corresponding path program 21 times [2022-03-01 17:51:53,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:53,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803782766] [2022-03-01 17:51:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:54,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803782766] [2022-03-01 17:51:54,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803782766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:54,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139537483] [2022-03-01 17:51:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:54,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:54,115 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:51:54,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:51:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:54,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:51:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:55,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:55,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:51:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:55,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139537483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:55,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:55,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:51:55,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949249370] [2022-03-01 17:51:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:51:55,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:51:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:55,254 INFO L87 Difference]: Start difference. First operand 4906 states and 21901 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:59,407 INFO L93 Difference]: Finished difference Result 7815 states and 32705 transitions. [2022-03-01 17:51:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 17:51:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:51:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:59,426 INFO L225 Difference]: With dead ends: 7815 [2022-03-01 17:51:59,426 INFO L226 Difference]: Without dead ends: 7633 [2022-03-01 17:51:59,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=776, Invalid=6706, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 17:51:59,427 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 650 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 6199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2253 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:59,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 401 Invalid, 6199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3704 Invalid, 0 Unknown, 2253 Unchecked, 1.7s Time] [2022-03-01 17:51:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2022-03-01 17:51:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 4928. [2022-03-01 17:51:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 4.462756241120357) internal successors, (21988), 4927 states have internal predecessors, (21988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 21988 transitions. [2022-03-01 17:51:59,533 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 21988 transitions. Word has length 30 [2022-03-01 17:51:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 4928 states and 21988 transitions. [2022-03-01 17:51:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 21988 transitions. [2022-03-01 17:51:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:51:59,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:59,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:59,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:51:59,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:59,751 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1893696269, now seen corresponding path program 5 times [2022-03-01 17:51:59,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:59,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352745822] [2022-03-01 17:51:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:59,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:59,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352745822] [2022-03-01 17:51:59,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352745822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:59,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128917132] [2022-03-01 17:51:59,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:59,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:59,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:59,977 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:59,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:52:00,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:00,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:00,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:00,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 49 [2022-03-01 17:52:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:00,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:01,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:01,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:52:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128917132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:01,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:01,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:52:01,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589101718] [2022-03-01 17:52:01,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:01,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:01,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:01,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:01,403 INFO L87 Difference]: Start difference. First operand 4928 states and 21988 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:02,968 INFO L93 Difference]: Finished difference Result 6277 states and 27311 transitions. [2022-03-01 17:52:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:52:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:02,985 INFO L225 Difference]: With dead ends: 6277 [2022-03-01 17:52:02,985 INFO L226 Difference]: Without dead ends: 6236 [2022-03-01 17:52:02,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=2681, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:52:02,986 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 276 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 3833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2404 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:02,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 359 Invalid, 3833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1324 Invalid, 0 Unknown, 2404 Unchecked, 0.6s Time] [2022-03-01 17:52:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2022-03-01 17:52:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4946. [2022-03-01 17:52:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.459656218402427) internal successors, (22053), 4945 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22053 transitions. [2022-03-01 17:52:03,090 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22053 transitions. Word has length 30 [2022-03-01 17:52:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:03,090 INFO L470 AbstractCegarLoop]: Abstraction has 4946 states and 22053 transitions. [2022-03-01 17:52:03,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22053 transitions. [2022-03-01 17:52:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:03,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:03,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:03,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-01 17:52:03,316 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1299431135, now seen corresponding path program 6 times [2022-03-01 17:52:03,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:03,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127971108] [2022-03-01 17:52:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:03,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127971108] [2022-03-01 17:52:03,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127971108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:03,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097300270] [2022-03-01 17:52:03,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:03,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:03,558 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:03,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:52:03,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:52:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:03,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-03-01 17:52:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:04,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:16,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:16,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-03-01 17:52:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:17,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097300270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:17,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:17,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:52:17,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815331384] [2022-03-01 17:52:17,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:17,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=862, Unknown=2, NotChecked=0, Total=992 [2022-03-01 17:52:17,023 INFO L87 Difference]: Start difference. First operand 4946 states and 22053 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:18,286 INFO L93 Difference]: Finished difference Result 6252 states and 27246 transitions. [2022-03-01 17:52:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:52:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:18,303 INFO L225 Difference]: With dead ends: 6252 [2022-03-01 17:52:18,303 INFO L226 Difference]: Without dead ends: 6229 [2022-03-01 17:52:18,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=387, Invalid=2473, Unknown=2, NotChecked=0, Total=2862 [2022-03-01 17:52:18,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 291 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2087 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:18,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 188 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 857 Invalid, 0 Unknown, 2087 Unchecked, 0.4s Time] [2022-03-01 17:52:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2022-03-01 17:52:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 4946. [2022-03-01 17:52:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.459453993933266) internal successors, (22052), 4945 states have internal predecessors, (22052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22052 transitions. [2022-03-01 17:52:18,401 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22052 transitions. Word has length 30 [2022-03-01 17:52:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 4946 states and 22052 transitions. [2022-03-01 17:52:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22052 transitions. [2022-03-01 17:52:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:18,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:18,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:18,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:18,627 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1198584802, now seen corresponding path program 2 times [2022-03-01 17:52:18,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:18,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984095501] [2022-03-01 17:52:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:18,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984095501] [2022-03-01 17:52:18,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984095501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:18,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709401164] [2022-03-01 17:52:18,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:18,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:18,863 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:18,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:52:18,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:52:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:19,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:19,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:52:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:19,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:19,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:52:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709401164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:19,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:19,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 17:52:19,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808793818] [2022-03-01 17:52:19,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:19,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:52:19,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:52:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:52:19,905 INFO L87 Difference]: Start difference. First operand 4946 states and 22052 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:22,311 INFO L93 Difference]: Finished difference Result 6613 states and 28817 transitions. [2022-03-01 17:52:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:52:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:22,328 INFO L225 Difference]: With dead ends: 6613 [2022-03-01 17:52:22,328 INFO L226 Difference]: Without dead ends: 6529 [2022-03-01 17:52:22,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:52:22,329 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 344 mSDsluCounter, 2188 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2563 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:22,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 256 Invalid, 4321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1667 Invalid, 0 Unknown, 2563 Unchecked, 0.7s Time] [2022-03-01 17:52:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2022-03-01 17:52:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 4943. [2022-03-01 17:52:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4942 states have (on average 4.460542290570619) internal successors, (22044), 4942 states have internal predecessors, (22044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 22044 transitions. [2022-03-01 17:52:22,421 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 22044 transitions. Word has length 30 [2022-03-01 17:52:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:22,422 INFO L470 AbstractCegarLoop]: Abstraction has 4943 states and 22044 transitions. [2022-03-01 17:52:22,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:22,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 22044 transitions. [2022-03-01 17:52:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:22,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:22,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:22,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:22,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-01 17:52:22,645 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1156420976, now seen corresponding path program 22 times [2022-03-01 17:52:22,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:22,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357392864] [2022-03-01 17:52:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:22,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:22,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357392864] [2022-03-01 17:52:22,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357392864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:22,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172734128] [2022-03-01 17:52:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:22,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:22,879 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:22,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:52:22,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:22,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:22,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:23,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:52:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:23,467 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:23,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:52:23,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:23,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172734128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:23,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:23,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:52:23,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450556460] [2022-03-01 17:52:23,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:23,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:23,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:23,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:23,529 INFO L87 Difference]: Start difference. First operand 4943 states and 22044 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:24,771 INFO L93 Difference]: Finished difference Result 6203 states and 27049 transitions. [2022-03-01 17:52:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:52:24,771 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:24,786 INFO L225 Difference]: With dead ends: 6203 [2022-03-01 17:52:24,786 INFO L226 Difference]: Without dead ends: 6086 [2022-03-01 17:52:24,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:52:24,787 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 280 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:24,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 242 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2575 Invalid, 0 Unknown, 659 Unchecked, 0.8s Time] [2022-03-01 17:52:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-03-01 17:52:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4949. [2022-03-01 17:52:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 4.459983831851253) internal successors, (22068), 4948 states have internal predecessors, (22068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 22068 transitions. [2022-03-01 17:52:24,876 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 22068 transitions. Word has length 30 [2022-03-01 17:52:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:24,876 INFO L470 AbstractCegarLoop]: Abstraction has 4949 states and 22068 transitions. [2022-03-01 17:52:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 22068 transitions. [2022-03-01 17:52:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:24,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:24,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:24,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:25,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:52:25,095 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1662767242, now seen corresponding path program 23 times [2022-03-01 17:52:25,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:25,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224033063] [2022-03-01 17:52:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:25,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224033063] [2022-03-01 17:52:25,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224033063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:25,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321979090] [2022-03-01 17:52:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:25,313 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:25,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:52:25,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:25,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:25,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:52:25,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:25,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:25,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 17:52:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:26,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:26,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:26,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:52:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321979090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:26,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:26,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:52:26,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812653379] [2022-03-01 17:52:26,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:52:26,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:52:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:52:26,301 INFO L87 Difference]: Start difference. First operand 4949 states and 22068 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:27,964 INFO L93 Difference]: Finished difference Result 6497 states and 28044 transitions. [2022-03-01 17:52:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:52:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:27,982 INFO L225 Difference]: With dead ends: 6497 [2022-03-01 17:52:27,982 INFO L226 Difference]: Without dead ends: 6406 [2022-03-01 17:52:27,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:52:27,983 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 462 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2332 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:27,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 246 Invalid, 3753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1282 Invalid, 0 Unknown, 2332 Unchecked, 0.6s Time] [2022-03-01 17:52:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2022-03-01 17:52:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 4959. [2022-03-01 17:52:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4958 states have (on average 4.45824929407019) internal successors, (22104), 4958 states have internal predecessors, (22104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 22104 transitions. [2022-03-01 17:52:28,092 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 22104 transitions. Word has length 30 [2022-03-01 17:52:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:28,092 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 22104 transitions. [2022-03-01 17:52:28,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 22104 transitions. [2022-03-01 17:52:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:28,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:28,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:28,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-01 17:52:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-01 17:52:28,315 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2126641429, now seen corresponding path program 4 times [2022-03-01 17:52:28,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:28,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111054779] [2022-03-01 17:52:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:28,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111054779] [2022-03-01 17:52:28,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111054779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:28,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466791871] [2022-03-01 17:52:28,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:28,539 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:52:28,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:28,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:52:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:29,094 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:29,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:52:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:29,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:29,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466791871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:29,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:29,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:52:29,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749500475] [2022-03-01 17:52:29,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:29,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:29,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:29,157 INFO L87 Difference]: Start difference. First operand 4959 states and 22104 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:29,979 INFO L93 Difference]: Finished difference Result 5648 states and 24814 transitions. [2022-03-01 17:52:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:52:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:29,996 INFO L225 Difference]: With dead ends: 5648 [2022-03-01 17:52:29,996 INFO L226 Difference]: Without dead ends: 5584 [2022-03-01 17:52:29,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:52:29,997 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 190 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:29,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 153 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1793 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2022-03-01 17:52:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2022-03-01 17:52:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 4959. [2022-03-01 17:52:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4958 states have (on average 4.45824929407019) internal successors, (22104), 4958 states have internal predecessors, (22104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 22104 transitions. [2022-03-01 17:52:30,091 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 22104 transitions. Word has length 30 [2022-03-01 17:52:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:30,091 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 22104 transitions. [2022-03-01 17:52:30,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 22104 transitions. [2022-03-01 17:52:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:30,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:30,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:30,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:30,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,315 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 988372752, now seen corresponding path program 24 times [2022-03-01 17:52:30,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:30,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362036730] [2022-03-01 17:52:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:30,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362036730] [2022-03-01 17:52:30,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362036730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:30,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405760396] [2022-03-01 17:52:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:30,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:30,520 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:30,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:52:30,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:52:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:52:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:30,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:30,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-03-01 17:52:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:31,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:31,616 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:52:31,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 59 [2022-03-01 17:52:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:31,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405760396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:31,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:31,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 17:52:31,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845202173] [2022-03-01 17:52:31,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:52:31,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:52:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:52:31,748 INFO L87 Difference]: Start difference. First operand 4959 states and 22104 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:33,697 INFO L93 Difference]: Finished difference Result 5571 states and 24357 transitions. [2022-03-01 17:52:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:52:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:33,711 INFO L225 Difference]: With dead ends: 5571 [2022-03-01 17:52:33,711 INFO L226 Difference]: Without dead ends: 5449 [2022-03-01 17:52:33,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:52:33,711 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 381 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1063 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:33,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 145 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1736 Invalid, 0 Unknown, 1063 Unchecked, 0.8s Time] [2022-03-01 17:52:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-03-01 17:52:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 4987. [2022-03-01 17:52:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 4.453068592057762) internal successors, (22203), 4986 states have internal predecessors, (22203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 22203 transitions. [2022-03-01 17:52:33,792 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 22203 transitions. Word has length 30 [2022-03-01 17:52:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:33,793 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 22203 transitions. [2022-03-01 17:52:33,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 22203 transitions. [2022-03-01 17:52:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:33,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:33,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:33,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:34,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-01 17:52:34,017 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash -195058706, now seen corresponding path program 25 times [2022-03-01 17:52:34,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:34,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957606560] [2022-03-01 17:52:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:34,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:34,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957606560] [2022-03-01 17:52:34,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957606560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:34,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729188767] [2022-03-01 17:52:34,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:34,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:34,235 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:34,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:52:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:52:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:34,762 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:34,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:52:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729188767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:34,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:34,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:52:34,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87413963] [2022-03-01 17:52:34,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:34,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:34,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:34,875 INFO L87 Difference]: Start difference. First operand 4987 states and 22203 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:36,169 INFO L93 Difference]: Finished difference Result 5640 states and 24823 transitions. [2022-03-01 17:52:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:52:36,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:36,211 INFO L225 Difference]: With dead ends: 5640 [2022-03-01 17:52:36,212 INFO L226 Difference]: Without dead ends: 5563 [2022-03-01 17:52:36,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:52:36,212 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:36,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 111 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2075 Invalid, 0 Unknown, 179 Unchecked, 0.8s Time] [2022-03-01 17:52:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2022-03-01 17:52:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5000. [2022-03-01 17:52:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 4.451490298059612) internal successors, (22253), 4999 states have internal predecessors, (22253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 22253 transitions. [2022-03-01 17:52:36,302 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 22253 transitions. Word has length 30 [2022-03-01 17:52:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:36,302 INFO L470 AbstractCegarLoop]: Abstraction has 5000 states and 22253 transitions. [2022-03-01 17:52:36,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 22253 transitions. [2022-03-01 17:52:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:36,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:36,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:36,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-01 17:52:36,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:36,526 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash -770917910, now seen corresponding path program 26 times [2022-03-01 17:52:36,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:36,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133806618] [2022-03-01 17:52:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:36,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:36,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:36,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133806618] [2022-03-01 17:52:36,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133806618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:36,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272461049] [2022-03-01 17:52:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:36,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:36,815 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:36,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:52:36,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:36,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:52:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:37,352 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:37,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:52:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272461049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:37,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:37,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:52:37,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210776900] [2022-03-01 17:52:37,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:37,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:52:37,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:52:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:52:37,409 INFO L87 Difference]: Start difference. First operand 5000 states and 22253 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:38,331 INFO L93 Difference]: Finished difference Result 5571 states and 24500 transitions. [2022-03-01 17:52:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:52:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:38,344 INFO L225 Difference]: With dead ends: 5571 [2022-03-01 17:52:38,345 INFO L226 Difference]: Without dead ends: 5498 [2022-03-01 17:52:38,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:52:38,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:38,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 140 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2024 Invalid, 0 Unknown, 445 Unchecked, 0.7s Time] [2022-03-01 17:52:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2022-03-01 17:52:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5008. [2022-03-01 17:52:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 4.450569203115638) internal successors, (22284), 5007 states have internal predecessors, (22284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 22284 transitions. [2022-03-01 17:52:38,430 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 22284 transitions. Word has length 30 [2022-03-01 17:52:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:38,430 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 22284 transitions. [2022-03-01 17:52:38,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 22284 transitions. [2022-03-01 17:52:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:38,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:38,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:38,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:38,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-01 17:52:38,654 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 709435542, now seen corresponding path program 27 times [2022-03-01 17:52:38,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:38,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006602468] [2022-03-01 17:52:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:38,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:38,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006602468] [2022-03-01 17:52:38,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006602468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:38,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988169168] [2022-03-01 17:52:38,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:38,877 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:38,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:52:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:52:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:52:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:39,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:39,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:39,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-03-01 17:52:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:40,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-03-01 17:52:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:40,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988169168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:40,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:40,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 17:52:40,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264314918] [2022-03-01 17:52:40,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:40,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:40,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:40,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:40,167 INFO L87 Difference]: Start difference. First operand 5008 states and 22284 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:44,847 INFO L93 Difference]: Finished difference Result 7278 states and 31289 transitions. [2022-03-01 17:52:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 17:52:44,848 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:44,865 INFO L225 Difference]: With dead ends: 7278 [2022-03-01 17:52:44,866 INFO L226 Difference]: Without dead ends: 7128 [2022-03-01 17:52:44,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3640 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1326, Invalid=10230, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 17:52:44,866 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 426 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2189 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:44,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 268 Invalid, 5919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3565 Invalid, 0 Unknown, 2189 Unchecked, 1.5s Time] [2022-03-01 17:52:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2022-03-01 17:52:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 5030. [2022-03-01 17:52:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 4.4485981308411215) internal successors, (22372), 5029 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 22372 transitions. [2022-03-01 17:52:44,962 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 22372 transitions. Word has length 30 [2022-03-01 17:52:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:44,962 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 22372 transitions. [2022-03-01 17:52:44,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 22372 transitions. [2022-03-01 17:52:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:44,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:44,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:44,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:52:45,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:45,187 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1357713238, now seen corresponding path program 28 times [2022-03-01 17:52:45,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:45,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404512077] [2022-03-01 17:52:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:45,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:45,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:45,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404512077] [2022-03-01 17:52:45,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404512077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:45,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036816552] [2022-03-01 17:52:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:45,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:45,332 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:45,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:52:45,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:45,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:45,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:45,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:52:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:45,733 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:45,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:52:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:45,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:45,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036816552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:45,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:45,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:52:45,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162638879] [2022-03-01 17:52:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:45,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:45,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:45,801 INFO L87 Difference]: Start difference. First operand 5030 states and 22372 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:46,773 INFO L93 Difference]: Finished difference Result 5632 states and 24740 transitions. [2022-03-01 17:52:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:52:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:46,787 INFO L225 Difference]: With dead ends: 5632 [2022-03-01 17:52:46,787 INFO L226 Difference]: Without dead ends: 5557 [2022-03-01 17:52:46,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:52:46,788 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 215 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:46,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 163 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2131 Invalid, 0 Unknown, 316 Unchecked, 0.6s Time] [2022-03-01 17:52:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2022-03-01 17:52:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5035. [2022-03-01 17:52:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 4.44854986094557) internal successors, (22394), 5034 states have internal predecessors, (22394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 22394 transitions. [2022-03-01 17:52:46,876 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 22394 transitions. Word has length 30 [2022-03-01 17:52:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:46,876 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 22394 transitions. [2022-03-01 17:52:46,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 22394 transitions. [2022-03-01 17:52:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:46,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:46,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:46,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:47,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-03-01 17:52:47,091 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1192890052, now seen corresponding path program 29 times [2022-03-01 17:52:47,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:47,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644826283] [2022-03-01 17:52:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:47,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:47,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644826283] [2022-03-01 17:52:47,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644826283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:47,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177762762] [2022-03-01 17:52:47,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:47,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:47,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:47,357 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:47,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:52:47,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:47,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:47,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:52:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:47,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-03-01 17:52:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:48,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:48,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:48,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:48,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:48,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:52:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:48,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177762762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:48,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:48,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 17:52:48,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696396118] [2022-03-01 17:52:48,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:48,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:48,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:48,228 INFO L87 Difference]: Start difference. First operand 5035 states and 22394 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:52,594 INFO L93 Difference]: Finished difference Result 7824 states and 32679 transitions. [2022-03-01 17:52:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 17:52:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:52,613 INFO L225 Difference]: With dead ends: 7824 [2022-03-01 17:52:52,613 INFO L226 Difference]: Without dead ends: 7679 [2022-03-01 17:52:52,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1146, Invalid=7410, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 17:52:52,614 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 813 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 3919 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 4273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 3919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:52,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 294 Invalid, 4273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 3919 Invalid, 0 Unknown, 44 Unchecked, 1.9s Time] [2022-03-01 17:52:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2022-03-01 17:52:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 5072. [2022-03-01 17:52:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 5071 states have (on average 4.443896667323999) internal successors, (22535), 5071 states have internal predecessors, (22535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 22535 transitions. [2022-03-01 17:52:52,715 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 22535 transitions. Word has length 30 [2022-03-01 17:52:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:52,715 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 22535 transitions. [2022-03-01 17:52:52,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 22535 transitions. [2022-03-01 17:52:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:52,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:52,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:52,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:52:52,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:52,939 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash -469674318, now seen corresponding path program 30 times [2022-03-01 17:52:52,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:52,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357010914] [2022-03-01 17:52:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:53,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357010914] [2022-03-01 17:52:53,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357010914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:53,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825709587] [2022-03-01 17:52:53,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:53,060 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:53,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:52:53,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:52:53,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:52:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:53,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2022-03-01 17:52:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-03-01 17:52:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825709587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:53,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:53,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-03-01 17:52:53,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917055339] [2022-03-01 17:52:53,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:53,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:53,704 INFO L87 Difference]: Start difference. First operand 5072 states and 22535 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:57,623 INFO L93 Difference]: Finished difference Result 8523 states and 35188 transitions. [2022-03-01 17:52:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 17:52:57,624 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:52:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:57,645 INFO L225 Difference]: With dead ends: 8523 [2022-03-01 17:52:57,645 INFO L226 Difference]: Without dead ends: 8081 [2022-03-01 17:52:57,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1188, Invalid=8124, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:52:57,646 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 915 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 6075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1823 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:57,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 334 Invalid, 6075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3923 Invalid, 0 Unknown, 1823 Unchecked, 1.4s Time] [2022-03-01 17:52:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2022-03-01 17:52:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 5126. [2022-03-01 17:52:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5126 states, 5125 states have (on average 4.445268292682927) internal successors, (22782), 5125 states have internal predecessors, (22782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 22782 transitions. [2022-03-01 17:52:57,761 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 22782 transitions. Word has length 30 [2022-03-01 17:52:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 5126 states and 22782 transitions. [2022-03-01 17:52:57,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 22782 transitions. [2022-03-01 17:52:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:52:57,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:57,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:57,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-01 17:52:57,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:52:57,983 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1653105776, now seen corresponding path program 31 times [2022-03-01 17:52:57,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:57,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063542768] [2022-03-01 17:52:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:58,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:58,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063542768] [2022-03-01 17:52:58,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063542768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:58,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124281722] [2022-03-01 17:52:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:58,132 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:58,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:52:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:58,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:52:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:58,592 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:58,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:52:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:58,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124281722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:58,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:58,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:52:58,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891291606] [2022-03-01 17:52:58,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:52:58,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:52:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:52:58,675 INFO L87 Difference]: Start difference. First operand 5126 states and 22782 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:00,746 INFO L93 Difference]: Finished difference Result 6641 states and 28914 transitions. [2022-03-01 17:53:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:53:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:00,763 INFO L225 Difference]: With dead ends: 6641 [2022-03-01 17:53:00,763 INFO L226 Difference]: Without dead ends: 6558 [2022-03-01 17:53:00,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=456, Invalid=2966, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:53:00,764 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3100 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:00,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 157 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:53:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-03-01 17:53:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 5122. [2022-03-01 17:53:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 4.445225541886351) internal successors, (22764), 5121 states have internal predecessors, (22764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 22764 transitions. [2022-03-01 17:53:00,858 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 22764 transitions. Word has length 30 [2022-03-01 17:53:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:00,858 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 22764 transitions. [2022-03-01 17:53:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 22764 transitions. [2022-03-01 17:53:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:00,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:00,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:01,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-01 17:53:01,082 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1917752154, now seen corresponding path program 32 times [2022-03-01 17:53:01,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:01,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360858038] [2022-03-01 17:53:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:01,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:01,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360858038] [2022-03-01 17:53:01,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360858038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:01,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610841607] [2022-03-01 17:53:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:01,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:01,340 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:01,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:53:01,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:01,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:53:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:01,830 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:01,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:53:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610841607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:01,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:01,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:53:01,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434300985] [2022-03-01 17:53:01,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:01,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:01,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:01,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:01,900 INFO L87 Difference]: Start difference. First operand 5122 states and 22764 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:04,322 INFO L93 Difference]: Finished difference Result 6848 states and 29746 transitions. [2022-03-01 17:53:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:04,341 INFO L225 Difference]: With dead ends: 6848 [2022-03-01 17:53:04,341 INFO L226 Difference]: Without dead ends: 6666 [2022-03-01 17:53:04,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:53:04,342 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 329 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:04,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 236 Invalid, 4464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 4247 Invalid, 0 Unknown, 23 Unchecked, 1.5s Time] [2022-03-01 17:53:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2022-03-01 17:53:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 5149. [2022-03-01 17:53:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5148 states have (on average 4.4438616938616935) internal successors, (22877), 5148 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 22877 transitions. [2022-03-01 17:53:04,449 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 22877 transitions. Word has length 30 [2022-03-01 17:53:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:04,449 INFO L470 AbstractCegarLoop]: Abstraction has 5149 states and 22877 transitions. [2022-03-01 17:53:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 22877 transitions. [2022-03-01 17:53:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:04,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:04,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:04,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:04,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-01 17:53:04,674 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1246319585, now seen corresponding path program 29 times [2022-03-01 17:53:04,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:04,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485551327] [2022-03-01 17:53:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:04,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:04,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:04,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485551327] [2022-03-01 17:53:04,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485551327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:04,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425630570] [2022-03-01 17:53:04,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:04,924 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:04,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:53:04,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-01 17:53:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:05,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:05,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2022-03-01 17:53:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:05,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:05,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:53:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:05,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425630570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:05,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:05,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:53:05,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412667511] [2022-03-01 17:53:05,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:05,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:53:05,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:53:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:53:05,586 INFO L87 Difference]: Start difference. First operand 5149 states and 22877 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,236 INFO L93 Difference]: Finished difference Result 10213 states and 41810 transitions. [2022-03-01 17:53:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-01 17:53:09,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,264 INFO L225 Difference]: With dead ends: 10213 [2022-03-01 17:53:09,264 INFO L226 Difference]: Without dead ends: 9918 [2022-03-01 17:53:09,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4614 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1778, Invalid=10654, Unknown=0, NotChecked=0, Total=12432 [2022-03-01 17:53:09,265 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 783 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 5008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 367 Invalid, 5008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 3302 Invalid, 0 Unknown, 1393 Unchecked, 1.2s Time] [2022-03-01 17:53:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2022-03-01 17:53:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 5255. [2022-03-01 17:53:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.445184621240959) internal successors, (23355), 5254 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 23355 transitions. [2022-03-01 17:53:09,399 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 23355 transitions. Word has length 30 [2022-03-01 17:53:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,400 INFO L470 AbstractCegarLoop]: Abstraction has 5255 states and 23355 transitions. [2022-03-01 17:53:09,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 23355 transitions. [2022-03-01 17:53:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:09,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-01 17:53:09,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,626 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash 323705905, now seen corresponding path program 30 times [2022-03-01 17:53:09,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771074029] [2022-03-01 17:53:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771074029] [2022-03-01 17:53:09,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771074029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:09,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895759385] [2022-03-01 17:53:09,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:09,777 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:09,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:53:09,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:09,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:53:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:10,126 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:10,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:53:10,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:10,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:10,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:53:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895759385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:10,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:10,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-01 17:53:10,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903294473] [2022-03-01 17:53:10,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:10,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:53:10,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:53:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:53:10,198 INFO L87 Difference]: Start difference. First operand 5255 states and 23355 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:12,005 INFO L93 Difference]: Finished difference Result 6874 states and 29886 transitions. [2022-03-01 17:53:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:53:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:12,023 INFO L225 Difference]: With dead ends: 6874 [2022-03-01 17:53:12,023 INFO L226 Difference]: Without dead ends: 6792 [2022-03-01 17:53:12,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:53:12,024 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:12,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 145 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:53:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-03-01 17:53:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 5257. [2022-03-01 17:53:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 4.4455859969558595) internal successors, (23366), 5256 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 23366 transitions. [2022-03-01 17:53:12,127 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 23366 transitions. Word has length 30 [2022-03-01 17:53:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:12,128 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 23366 transitions. [2022-03-01 17:53:12,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 23366 transitions. [2022-03-01 17:53:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:12,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:12,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-01 17:53:12,351 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1804059357, now seen corresponding path program 31 times [2022-03-01 17:53:12,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:12,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609735295] [2022-03-01 17:53:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:12,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609735295] [2022-03-01 17:53:12,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609735295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:12,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779423292] [2022-03-01 17:53:12,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:12,531 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:53:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:12,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:12,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:12,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:53:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:13,026 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:13,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:53:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:13,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:53:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:13,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779423292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:13,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:13,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:53:13,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118423826] [2022-03-01 17:53:13,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:13,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:13,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:13,110 INFO L87 Difference]: Start difference. First operand 5257 states and 23366 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:14,523 INFO L93 Difference]: Finished difference Result 6722 states and 29274 transitions. [2022-03-01 17:53:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:14,541 INFO L225 Difference]: With dead ends: 6722 [2022-03-01 17:53:14,541 INFO L226 Difference]: Without dead ends: 6639 [2022-03-01 17:53:14,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:53:14,542 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 2950 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:14,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 180 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2950 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:53:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2022-03-01 17:53:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 5248. [2022-03-01 17:53:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5248 states, 5247 states have (on average 4.44673146559939) internal successors, (23332), 5247 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5248 states to 5248 states and 23332 transitions. [2022-03-01 17:53:14,640 INFO L78 Accepts]: Start accepts. Automaton has 5248 states and 23332 transitions. Word has length 30 [2022-03-01 17:53:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:14,641 INFO L470 AbstractCegarLoop]: Abstraction has 5248 states and 23332 transitions. [2022-03-01 17:53:14,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 5248 states and 23332 transitions. [2022-03-01 17:53:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:14,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:14,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:14,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:14,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-03-01 17:53:14,866 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1394169556, now seen corresponding path program 33 times [2022-03-01 17:53:14,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:14,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486749305] [2022-03-01 17:53:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486749305] [2022-03-01 17:53:15,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486749305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607030867] [2022-03-01 17:53:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:15,037 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:53:15,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:15,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:53:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:15,392 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:15,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:53:15,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:53:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607030867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:15,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:15,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-01 17:53:15,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511284692] [2022-03-01 17:53:15,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:15,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:53:15,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:15,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:53:15,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:53:15,473 INFO L87 Difference]: Start difference. First operand 5248 states and 23332 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:17,330 INFO L93 Difference]: Finished difference Result 6631 states and 28908 transitions. [2022-03-01 17:53:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:53:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:17,347 INFO L225 Difference]: With dead ends: 6631 [2022-03-01 17:53:17,347 INFO L226 Difference]: Without dead ends: 6558 [2022-03-01 17:53:17,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:53:17,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 290 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:17,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 153 Invalid, 3064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:53:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-03-01 17:53:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 5257. [2022-03-01 17:53:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 4.446917808219178) internal successors, (23373), 5256 states have internal predecessors, (23373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 23373 transitions. [2022-03-01 17:53:17,447 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 23373 transitions. Word has length 30 [2022-03-01 17:53:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:17,447 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 23373 transitions. [2022-03-01 17:53:17,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 23373 transitions. [2022-03-01 17:53:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:17,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:17,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-01 17:53:17,672 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 210738098, now seen corresponding path program 34 times [2022-03-01 17:53:17,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:17,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735501643] [2022-03-01 17:53:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:17,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735501643] [2022-03-01 17:53:17,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735501643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:17,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083246138] [2022-03-01 17:53:17,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:17,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:17,838 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:17,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:53:17,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:17,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:53:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:18,253 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:18,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:53:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083246138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:18,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:18,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:53:18,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148086291] [2022-03-01 17:53:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:18,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:18,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:18,329 INFO L87 Difference]: Start difference. First operand 5257 states and 23373 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:19,773 INFO L93 Difference]: Finished difference Result 6679 states and 29130 transitions. [2022-03-01 17:53:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:19,790 INFO L225 Difference]: With dead ends: 6679 [2022-03-01 17:53:19,790 INFO L226 Difference]: Without dead ends: 6596 [2022-03-01 17:53:19,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:53:19,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 296 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:19,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 146 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:53:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2022-03-01 17:53:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 5253. [2022-03-01 17:53:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5253 states, 5252 states have (on average 4.446877380045697) internal successors, (23355), 5252 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5253 states to 5253 states and 23355 transitions. [2022-03-01 17:53:19,887 INFO L78 Accepts]: Start accepts. Automaton has 5253 states and 23355 transitions. Word has length 30 [2022-03-01 17:53:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:19,887 INFO L470 AbstractCegarLoop]: Abstraction has 5253 states and 23355 transitions. [2022-03-01 17:53:19,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5253 states and 23355 transitions. [2022-03-01 17:53:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:19,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:19,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:19,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:20,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-01 17:53:20,168 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -365121106, now seen corresponding path program 35 times [2022-03-01 17:53:20,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:20,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812186488] [2022-03-01 17:53:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:20,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:20,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812186488] [2022-03-01 17:53:20,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812186488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:20,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590837169] [2022-03-01 17:53:20,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:20,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:20,289 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:20,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:53:20,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:53:20,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:20,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:20,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-03-01 17:53:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:20,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:20,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:20,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:20,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:53:20,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:20,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:20,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:53:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:20,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590837169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:20,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:20,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-01 17:53:20,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502027241] [2022-03-01 17:53:20,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:53:20,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:53:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:53:20,785 INFO L87 Difference]: Start difference. First operand 5253 states and 23355 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:25,186 INFO L93 Difference]: Finished difference Result 8720 states and 36079 transitions. [2022-03-01 17:53:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 17:53:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:25,207 INFO L225 Difference]: With dead ends: 8720 [2022-03-01 17:53:25,207 INFO L226 Difference]: Without dead ends: 8575 [2022-03-01 17:53:25,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1496, Invalid=10494, Unknown=0, NotChecked=0, Total=11990 [2022-03-01 17:53:25,208 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 941 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 4536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:25,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 343 Invalid, 4536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 17:53:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2022-03-01 17:53:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 5281. [2022-03-01 17:53:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5280 states have (on average 4.442045454545455) internal successors, (23454), 5280 states have internal predecessors, (23454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 23454 transitions. [2022-03-01 17:53:25,328 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 23454 transitions. Word has length 30 [2022-03-01 17:53:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:25,329 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 23454 transitions. [2022-03-01 17:53:25,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 23454 transitions. [2022-03-01 17:53:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:25,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:25,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:25,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-03-01 17:53:25,543 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1115232346, now seen corresponding path program 36 times [2022-03-01 17:53:25,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:25,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706279279] [2022-03-01 17:53:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:25,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706279279] [2022-03-01 17:53:25,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706279279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:25,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885769487] [2022-03-01 17:53:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:25,701 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:25,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:53:25,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:53:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:25,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:25,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2022-03-01 17:53:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:26,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:26,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:26,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-03-01 17:53:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:26,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885769487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:26,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:26,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-03-01 17:53:26,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314544832] [2022-03-01 17:53:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:26,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:26,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:26,648 INFO L87 Difference]: Start difference. First operand 5281 states and 23454 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:31,490 INFO L93 Difference]: Finished difference Result 8694 states and 35945 transitions. [2022-03-01 17:53:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-01 17:53:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:31,512 INFO L225 Difference]: With dead ends: 8694 [2022-03-01 17:53:31,512 INFO L226 Difference]: Without dead ends: 8404 [2022-03-01 17:53:31,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1497, Invalid=10275, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 17:53:31,514 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 804 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 6387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1643 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:31,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 331 Invalid, 6387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 4416 Invalid, 0 Unknown, 1643 Unchecked, 1.9s Time] [2022-03-01 17:53:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2022-03-01 17:53:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 5380. [2022-03-01 17:53:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 4.435396913924521) internal successors, (23858), 5379 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 23858 transitions. [2022-03-01 17:53:31,657 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 23858 transitions. Word has length 30 [2022-03-01 17:53:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:31,657 INFO L470 AbstractCegarLoop]: Abstraction has 5380 states and 23858 transitions. [2022-03-01 17:53:31,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 23858 transitions. [2022-03-01 17:53:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:31,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:31,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:31,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:31,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,885 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -516629928, now seen corresponding path program 37 times [2022-03-01 17:53:31,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:31,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306492683] [2022-03-01 17:53:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:31,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:32,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306492683] [2022-03-01 17:53:32,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306492683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:32,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416895916] [2022-03-01 17:53:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:32,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:32,028 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:32,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:53:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:32,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:32,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:53:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:32,419 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:32,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:53:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416895916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:32,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:32,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:53:32,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924407669] [2022-03-01 17:53:32,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:32,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:32,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:32,523 INFO L87 Difference]: Start difference. First operand 5380 states and 23858 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:34,054 INFO L93 Difference]: Finished difference Result 6860 states and 29777 transitions. [2022-03-01 17:53:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:53:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:34,072 INFO L225 Difference]: With dead ends: 6860 [2022-03-01 17:53:34,072 INFO L226 Difference]: Without dead ends: 6787 [2022-03-01 17:53:34,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:53:34,073 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 316 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:34,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 153 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2655 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2022-03-01 17:53:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2022-03-01 17:53:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5380. [2022-03-01 17:53:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 4.435396913924521) internal successors, (23858), 5379 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 23858 transitions. [2022-03-01 17:53:34,171 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 23858 transitions. Word has length 30 [2022-03-01 17:53:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 5380 states and 23858 transitions. [2022-03-01 17:53:34,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 23858 transitions. [2022-03-01 17:53:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:34,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:34,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:34,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:34,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:34,396 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1763510042, now seen corresponding path program 38 times [2022-03-01 17:53:34,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:34,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739614303] [2022-03-01 17:53:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:34,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:34,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739614303] [2022-03-01 17:53:34,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739614303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:34,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459463250] [2022-03-01 17:53:34,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:34,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:34,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:34,522 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:34,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:53:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:34,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:34,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-03-01 17:53:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:35,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:35,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:35,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:53:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459463250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:35,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:35,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 17:53:35,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808472002] [2022-03-01 17:53:35,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:35,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:35,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:35,193 INFO L87 Difference]: Start difference. First operand 5380 states and 23858 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:37,398 INFO L93 Difference]: Finished difference Result 7517 states and 32009 transitions. [2022-03-01 17:53:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:53:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:37,416 INFO L225 Difference]: With dead ends: 7517 [2022-03-01 17:53:37,416 INFO L226 Difference]: Without dead ends: 7332 [2022-03-01 17:53:37,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:53:37,439 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 427 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2401 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:37,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 304 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2301 Invalid, 0 Unknown, 2401 Unchecked, 0.7s Time] [2022-03-01 17:53:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2022-03-01 17:53:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 5553. [2022-03-01 17:53:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 4.4185878962536025) internal successors, (24532), 5552 states have internal predecessors, (24532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 24532 transitions. [2022-03-01 17:53:37,565 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 24532 transitions. Word has length 30 [2022-03-01 17:53:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:37,565 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 24532 transitions. [2022-03-01 17:53:37,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 24532 transitions. [2022-03-01 17:53:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:37,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:37,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:37,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:37,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-01 17:53:37,790 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash -787093248, now seen corresponding path program 39 times [2022-03-01 17:53:37,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:37,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643973956] [2022-03-01 17:53:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:37,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643973956] [2022-03-01 17:53:37,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643973956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:37,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125933534] [2022-03-01 17:53:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:37,928 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:37,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:53:37,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:38,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:53:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:38,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:38,260 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:38,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 52 [2022-03-01 17:53:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:38,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125933534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:38,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:38,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:53:38,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031211842] [2022-03-01 17:53:38,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:38,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:38,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:38,315 INFO L87 Difference]: Start difference. First operand 5553 states and 24532 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:39,483 INFO L93 Difference]: Finished difference Result 7020 states and 30439 transitions. [2022-03-01 17:53:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:53:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:39,501 INFO L225 Difference]: With dead ends: 7020 [2022-03-01 17:53:39,501 INFO L226 Difference]: Without dead ends: 6947 [2022-03-01 17:53:39,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=1777, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:53:39,502 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 302 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:39,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 168 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2644 Invalid, 0 Unknown, 40 Unchecked, 0.8s Time] [2022-03-01 17:53:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2022-03-01 17:53:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 5560. [2022-03-01 17:53:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 4.417521136895125) internal successors, (24557), 5559 states have internal predecessors, (24557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 24557 transitions. [2022-03-01 17:53:39,605 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 24557 transitions. Word has length 30 [2022-03-01 17:53:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 24557 transitions. [2022-03-01 17:53:39,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 24557 transitions. [2022-03-01 17:53:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:39,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:39,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:39,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:39,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:39,828 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1485925134, now seen corresponding path program 40 times [2022-03-01 17:53:39,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:39,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226012258] [2022-03-01 17:53:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:39,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226012258] [2022-03-01 17:53:39,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226012258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:39,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221226486] [2022-03-01 17:53:39,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:39,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:39,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:39,966 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:39,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:53:39,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:39,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:40,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 17:53:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:40,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:40,327 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:40,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:53:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:40,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221226486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:40,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:40,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:53:40,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073675467] [2022-03-01 17:53:40,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:40,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:40,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:40,385 INFO L87 Difference]: Start difference. First operand 5560 states and 24557 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:42,389 INFO L93 Difference]: Finished difference Result 7443 states and 32123 transitions. [2022-03-01 17:53:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:42,408 INFO L225 Difference]: With dead ends: 7443 [2022-03-01 17:53:42,408 INFO L226 Difference]: Without dead ends: 7261 [2022-03-01 17:53:42,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:53:42,408 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 376 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:42,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 251 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4373 Invalid, 0 Unknown, 23 Unchecked, 1.3s Time] [2022-03-01 17:53:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2022-03-01 17:53:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 5607. [2022-03-01 17:53:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5607 states, 5606 states have (on average 4.414199072422405) internal successors, (24746), 5606 states have internal predecessors, (24746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5607 states to 5607 states and 24746 transitions. [2022-03-01 17:53:42,515 INFO L78 Accepts]: Start accepts. Automaton has 5607 states and 24746 transitions. Word has length 30 [2022-03-01 17:53:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:42,515 INFO L470 AbstractCegarLoop]: Abstraction has 5607 states and 24746 transitions. [2022-03-01 17:53:42,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5607 states and 24746 transitions. [2022-03-01 17:53:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:42,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:42,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:42,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-01 17:53:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-01 17:53:42,735 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2137609593, now seen corresponding path program 32 times [2022-03-01 17:53:42,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:42,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525630154] [2022-03-01 17:53:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:42,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:42,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525630154] [2022-03-01 17:53:42,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525630154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:42,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847100418] [2022-03-01 17:53:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:42,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:42,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:42,957 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:42,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:53:42,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:42,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:43,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:43,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:43,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-03-01 17:53:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:43,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:43,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:43,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:53:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847100418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:43,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:43,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:53:43,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136983442] [2022-03-01 17:53:43,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:43,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:43,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:43,781 INFO L87 Difference]: Start difference. First operand 5607 states and 24746 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:48,308 INFO L93 Difference]: Finished difference Result 9310 states and 38490 transitions. [2022-03-01 17:53:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 17:53:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:48,332 INFO L225 Difference]: With dead ends: 9310 [2022-03-01 17:53:48,332 INFO L226 Difference]: Without dead ends: 8964 [2022-03-01 17:53:48,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=898, Invalid=6934, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 17:53:48,333 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 863 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 3998 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:48,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 353 Invalid, 5296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3998 Invalid, 0 Unknown, 1024 Unchecked, 1.9s Time] [2022-03-01 17:53:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2022-03-01 17:53:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 5580. [2022-03-01 17:53:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5580 states, 5579 states have (on average 4.415307402760352) internal successors, (24633), 5579 states have internal predecessors, (24633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5580 states to 5580 states and 24633 transitions. [2022-03-01 17:53:48,455 INFO L78 Accepts]: Start accepts. Automaton has 5580 states and 24633 transitions. Word has length 30 [2022-03-01 17:53:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:48,455 INFO L470 AbstractCegarLoop]: Abstraction has 5580 states and 24633 transitions. [2022-03-01 17:53:48,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5580 states and 24633 transitions. [2022-03-01 17:53:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:48,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:48,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:48,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:48,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-01 17:53:48,671 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash 790956176, now seen corresponding path program 41 times [2022-03-01 17:53:48,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:48,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004378415] [2022-03-01 17:53:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:48,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004378415] [2022-03-01 17:53:48,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004378415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:48,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495224419] [2022-03-01 17:53:48,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:48,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:48,811 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:48,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:53:48,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:48,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:53:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:49,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:49,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 17:53:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:49,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:49,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:49,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:53:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:49,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495224419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:49,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:49,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 30 [2022-03-01 17:53:49,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083407295] [2022-03-01 17:53:49,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:49,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:49,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:49,704 INFO L87 Difference]: Start difference. First operand 5580 states and 24633 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:51,349 INFO L93 Difference]: Finished difference Result 7050 states and 30412 transitions. [2022-03-01 17:53:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:51,368 INFO L225 Difference]: With dead ends: 7050 [2022-03-01 17:53:51,368 INFO L226 Difference]: Without dead ends: 7005 [2022-03-01 17:53:51,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:53:51,369 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 358 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:51,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 294 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1539 Invalid, 0 Unknown, 2212 Unchecked, 0.6s Time] [2022-03-01 17:53:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2022-03-01 17:53:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 5704. [2022-03-01 17:53:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 4.406452744169735) internal successors, (25130), 5703 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 25130 transitions. [2022-03-01 17:53:51,482 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 25130 transitions. Word has length 30 [2022-03-01 17:53:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 25130 transitions. [2022-03-01 17:53:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 25130 transitions. [2022-03-01 17:53:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:51,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:51,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:51,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:51,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:51,707 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1709756985, now seen corresponding path program 5 times [2022-03-01 17:53:51,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:51,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40182065] [2022-03-01 17:53:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:51,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40182065] [2022-03-01 17:53:51,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40182065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:51,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591177411] [2022-03-01 17:53:51,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:51,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:51,850 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:51,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:53:51,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:51,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:53:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:52,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 17:53:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:52,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:53:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:52,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591177411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:52,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:52,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 30 [2022-03-01 17:53:52,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304511741] [2022-03-01 17:53:52,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:52,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:52,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:52,799 INFO L87 Difference]: Start difference. First operand 5704 states and 25130 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:55,078 INFO L93 Difference]: Finished difference Result 7553 states and 32300 transitions. [2022-03-01 17:53:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:53:55,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:53:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:55,099 INFO L225 Difference]: With dead ends: 7553 [2022-03-01 17:53:55,099 INFO L226 Difference]: Without dead ends: 7372 [2022-03-01 17:53:55,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:53:55,100 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 405 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1456 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:55,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 332 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2062 Invalid, 0 Unknown, 1456 Unchecked, 0.9s Time] [2022-03-01 17:53:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2022-03-01 17:53:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 5747. [2022-03-01 17:53:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 4.403585102680125) internal successors, (25303), 5746 states have internal predecessors, (25303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 25303 transitions. [2022-03-01 17:53:55,212 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 25303 transitions. Word has length 30 [2022-03-01 17:53:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:55,212 INFO L470 AbstractCegarLoop]: Abstraction has 5747 states and 25303 transitions. [2022-03-01 17:53:55,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 25303 transitions. [2022-03-01 17:53:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:53:55,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:55,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:55,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-01 17:53:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:55,427 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1759647114, now seen corresponding path program 42 times [2022-03-01 17:53:55,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:55,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031473698] [2022-03-01 17:53:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:55,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:55,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031473698] [2022-03-01 17:53:55,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031473698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:55,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001270113] [2022-03-01 17:53:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:55,555 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 17:53:55,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:55,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:55,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 52 [2022-03-01 17:53:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:55,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9 [2022-03-01 17:53:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001270113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:56,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:56,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-01 17:53:56,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731178598] [2022-03-01 17:53:56,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:56,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:53:56,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:53:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:53:56,155 INFO L87 Difference]: Start difference. First operand 5747 states and 25303 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:00,920 INFO L93 Difference]: Finished difference Result 9964 states and 40834 transitions. [2022-03-01 17:54:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 17:54:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:00,945 INFO L225 Difference]: With dead ends: 9964 [2022-03-01 17:54:00,945 INFO L226 Difference]: Without dead ends: 9685 [2022-03-01 17:54:00,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1000, Invalid=7742, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 17:54:00,946 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1082 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 5154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:00,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 379 Invalid, 5154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 17:54:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2022-03-01 17:54:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 5828. [2022-03-01 17:54:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 5827 states have (on average 4.408615067787884) internal successors, (25689), 5827 states have internal predecessors, (25689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 25689 transitions. [2022-03-01 17:54:01,076 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 25689 transitions. Word has length 30 [2022-03-01 17:54:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:01,076 INFO L470 AbstractCegarLoop]: Abstraction has 5828 states and 25689 transitions. [2022-03-01 17:54:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 25689 transitions. [2022-03-01 17:54:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:01,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:01,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:01,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 17:54:01,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,292 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2080603933, now seen corresponding path program 72 times [2022-03-01 17:54:01,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:01,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830292527] [2022-03-01 17:54:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:01,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830292527] [2022-03-01 17:54:01,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830292527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:01,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483283519] [2022-03-01 17:54:01,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:01,522 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:01,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 17:54:01,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:54:01,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:54:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:01,907 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:01,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483283519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:01,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:01,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 17:54:01,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428102114] [2022-03-01 17:54:01,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:01,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:54:01,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:54:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:54:01,960 INFO L87 Difference]: Start difference. First operand 5828 states and 25689 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:03,252 INFO L93 Difference]: Finished difference Result 6452 states and 28174 transitions. [2022-03-01 17:54:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:54:03,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:03,269 INFO L225 Difference]: With dead ends: 6452 [2022-03-01 17:54:03,269 INFO L226 Difference]: Without dead ends: 6387 [2022-03-01 17:54:03,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:54:03,269 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:03,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 124 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1790 Invalid, 0 Unknown, 356 Unchecked, 0.7s Time] [2022-03-01 17:54:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2022-03-01 17:54:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 5828. [2022-03-01 17:54:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 5827 states have (on average 4.408615067787884) internal successors, (25689), 5827 states have internal predecessors, (25689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 25689 transitions. [2022-03-01 17:54:03,402 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 25689 transitions. Word has length 30 [2022-03-01 17:54:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:03,402 INFO L470 AbstractCegarLoop]: Abstraction has 5828 states and 25689 transitions. [2022-03-01 17:54:03,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 25689 transitions. [2022-03-01 17:54:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:03,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:03,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:03,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:03,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-01 17:54:03,627 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash -112273467, now seen corresponding path program 73 times [2022-03-01 17:54:03,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:03,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673618014] [2022-03-01 17:54:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:03,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673618014] [2022-03-01 17:54:03,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673618014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:03,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318804501] [2022-03-01 17:54:03,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:03,846 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:03,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 17:54:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:04,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:04,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:54:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:04,324 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:04,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:04,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318804501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:04,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:04,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:04,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597617035] [2022-03-01 17:54:04,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:04,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:04,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:04,384 INFO L87 Difference]: Start difference. First operand 5828 states and 25689 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:05,877 INFO L93 Difference]: Finished difference Result 6630 states and 28884 transitions. [2022-03-01 17:54:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:54:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:05,900 INFO L225 Difference]: With dead ends: 6630 [2022-03-01 17:54:05,900 INFO L226 Difference]: Without dead ends: 6546 [2022-03-01 17:54:05,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:54:05,901 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 239 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:05,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 164 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2073 Invalid, 0 Unknown, 375 Unchecked, 0.8s Time] [2022-03-01 17:54:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6546 states. [2022-03-01 17:54:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6546 to 5818. [2022-03-01 17:54:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 4.414302905277634) internal successors, (25678), 5817 states have internal predecessors, (25678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 25678 transitions. [2022-03-01 17:54:06,034 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 25678 transitions. Word has length 30 [2022-03-01 17:54:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:06,035 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 25678 transitions. [2022-03-01 17:54:06,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 25678 transitions. [2022-03-01 17:54:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:06,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:06,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:06,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-01 17:54:06,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:06,264 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1006856669, now seen corresponding path program 74 times [2022-03-01 17:54:06,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360413217] [2022-03-01 17:54:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:06,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360413217] [2022-03-01 17:54:06,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360413217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:06,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684558502] [2022-03-01 17:54:06,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:06,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:06,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:06,501 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:06,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 17:54:06,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:06,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:06,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:06,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:54:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:06,965 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:06,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:07,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684558502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:07,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:07,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:07,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200497832] [2022-03-01 17:54:07,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:07,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:07,022 INFO L87 Difference]: Start difference. First operand 5818 states and 25678 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:08,289 INFO L93 Difference]: Finished difference Result 7126 states and 30803 transitions. [2022-03-01 17:54:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:54:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:08,307 INFO L225 Difference]: With dead ends: 7126 [2022-03-01 17:54:08,308 INFO L226 Difference]: Without dead ends: 7047 [2022-03-01 17:54:08,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:54:08,308 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:08,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 195 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2411 Invalid, 0 Unknown, 554 Unchecked, 0.7s Time] [2022-03-01 17:54:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2022-03-01 17:54:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 5849. [2022-03-01 17:54:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 5848 states have (on average 4.412619699042407) internal successors, (25805), 5848 states have internal predecessors, (25805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 25805 transitions. [2022-03-01 17:54:08,410 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 25805 transitions. Word has length 30 [2022-03-01 17:54:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:08,410 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 25805 transitions. [2022-03-01 17:54:08,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 25805 transitions. [2022-03-01 17:54:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:08,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:08,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:08,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:08,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:08,636 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 154321331, now seen corresponding path program 75 times [2022-03-01 17:54:08,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:08,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975784351] [2022-03-01 17:54:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:08,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975784351] [2022-03-01 17:54:08,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975784351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:08,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405291213] [2022-03-01 17:54:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:08,799 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 17:54:08,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:54:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:09,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:09,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-03-01 17:54:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:09,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:09,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:54:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405291213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:09,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:09,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 17:54:09,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013543520] [2022-03-01 17:54:09,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:09,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:09,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:09,685 INFO L87 Difference]: Start difference. First operand 5849 states and 25805 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:12,862 INFO L93 Difference]: Finished difference Result 8384 states and 35643 transitions. [2022-03-01 17:54:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:54:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:12,883 INFO L225 Difference]: With dead ends: 8384 [2022-03-01 17:54:12,883 INFO L226 Difference]: Without dead ends: 8190 [2022-03-01 17:54:12,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=909, Invalid=6747, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 17:54:12,884 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 537 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:12,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 220 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2356 Invalid, 0 Unknown, 2241 Unchecked, 0.9s Time] [2022-03-01 17:54:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2022-03-01 17:54:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 5902. [2022-03-01 17:54:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 5901 states have (on average 4.412472462294526) internal successors, (26038), 5901 states have internal predecessors, (26038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 26038 transitions. [2022-03-01 17:54:13,032 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 26038 transitions. Word has length 30 [2022-03-01 17:54:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 5902 states and 26038 transitions. [2022-03-01 17:54:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 26038 transitions. [2022-03-01 17:54:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:13,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:13,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:13,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:13,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:13,260 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1084827333, now seen corresponding path program 76 times [2022-03-01 17:54:13,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:13,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471137522] [2022-03-01 17:54:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:13,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:13,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471137522] [2022-03-01 17:54:13,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471137522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:13,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841166280] [2022-03-01 17:54:13,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:13,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:13,411 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 17:54:13,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:13,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:54:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:13,819 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:13,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:13,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:13,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841166280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:13,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:13,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:13,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800611297] [2022-03-01 17:54:13,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:13,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:13,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:13,872 INFO L87 Difference]: Start difference. First operand 5902 states and 26038 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:15,022 INFO L93 Difference]: Finished difference Result 6921 states and 30195 transitions. [2022-03-01 17:54:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:54:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:15,041 INFO L225 Difference]: With dead ends: 6921 [2022-03-01 17:54:15,041 INFO L226 Difference]: Without dead ends: 6840 [2022-03-01 17:54:15,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:54:15,041 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 228 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:15,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 149 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2130 Invalid, 0 Unknown, 381 Unchecked, 0.6s Time] [2022-03-01 17:54:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2022-03-01 17:54:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 5949. [2022-03-01 17:54:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 4.418123739071957) internal successors, (26279), 5948 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 26279 transitions. [2022-03-01 17:54:15,154 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 26279 transitions. Word has length 30 [2022-03-01 17:54:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:15,154 INFO L470 AbstractCegarLoop]: Abstraction has 5949 states and 26279 transitions. [2022-03-01 17:54:15,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 26279 transitions. [2022-03-01 17:54:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:15,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:15,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:15,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:15,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-01 17:54:15,379 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1979410535, now seen corresponding path program 77 times [2022-03-01 17:54:15,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:15,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205969756] [2022-03-01 17:54:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:15,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205969756] [2022-03-01 17:54:15,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205969756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:15,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651728889] [2022-03-01 17:54:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:15,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:15,552 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:15,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 17:54:15,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:15,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:15,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:54:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:16,039 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:16,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:16,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:16,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:16,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:16,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651728889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:16,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:16,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:16,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092142391] [2022-03-01 17:54:16,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:16,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:16,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:16,112 INFO L87 Difference]: Start difference. First operand 5949 states and 26279 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:18,173 INFO L93 Difference]: Finished difference Result 7623 states and 32637 transitions. [2022-03-01 17:54:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:54:18,173 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:18,192 INFO L225 Difference]: With dead ends: 7623 [2022-03-01 17:54:18,192 INFO L226 Difference]: Without dead ends: 7471 [2022-03-01 17:54:18,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=2381, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:54:18,192 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 364 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:18,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 303 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2862 Invalid, 0 Unknown, 575 Unchecked, 1.1s Time] [2022-03-01 17:54:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2022-03-01 17:54:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 6014. [2022-03-01 17:54:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.423914851155829) internal successors, (26601), 6013 states have internal predecessors, (26601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 26601 transitions. [2022-03-01 17:54:18,309 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 26601 transitions. Word has length 30 [2022-03-01 17:54:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:18,310 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 26601 transitions. [2022-03-01 17:54:18,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 26601 transitions. [2022-03-01 17:54:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:18,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:18,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:18,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:18,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-01 17:54:18,536 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1262542035, now seen corresponding path program 78 times [2022-03-01 17:54:18,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:18,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246259953] [2022-03-01 17:54:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246259953] [2022-03-01 17:54:18,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246259953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:18,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256586750] [2022-03-01 17:54:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:18,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:18,701 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:18,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 17:54:18,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:19,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:19,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:54:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:19,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:19,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-03-01 17:54:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256586750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:19,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:19,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 17:54:19,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001951400] [2022-03-01 17:54:19,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:19,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:19,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:19,953 INFO L87 Difference]: Start difference. First operand 6014 states and 26601 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:22,097 INFO L93 Difference]: Finished difference Result 8209 states and 35486 transitions. [2022-03-01 17:54:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:54:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:22,119 INFO L225 Difference]: With dead ends: 8209 [2022-03-01 17:54:22,119 INFO L226 Difference]: Without dead ends: 8052 [2022-03-01 17:54:22,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=592, Invalid=4100, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:54:22,120 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 331 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1714 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:22,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 246 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1848 Invalid, 0 Unknown, 1714 Unchecked, 0.7s Time] [2022-03-01 17:54:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2022-03-01 17:54:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 6104. [2022-03-01 17:54:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 4.431918728494183) internal successors, (27048), 6103 states have internal predecessors, (27048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 27048 transitions. [2022-03-01 17:54:22,292 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 27048 transitions. Word has length 30 [2022-03-01 17:54:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:22,292 INFO L470 AbstractCegarLoop]: Abstraction has 6104 states and 27048 transitions. [2022-03-01 17:54:22,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 27048 transitions. [2022-03-01 17:54:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:22,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:22,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:22,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:22,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-01 17:54:22,518 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -861929485, now seen corresponding path program 79 times [2022-03-01 17:54:22,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:22,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518681198] [2022-03-01 17:54:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:22,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518681198] [2022-03-01 17:54:22,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518681198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:22,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392376356] [2022-03-01 17:54:22,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:22,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:22,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:22,646 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 17:54:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:22,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:22,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:22,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:54:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:23,065 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:23,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:23,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:23,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:23,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392376356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:23,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:23,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:23,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848711732] [2022-03-01 17:54:23,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:23,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:23,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:23,120 INFO L87 Difference]: Start difference. First operand 6104 states and 27048 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:23,724 INFO L93 Difference]: Finished difference Result 6898 states and 30266 transitions. [2022-03-01 17:54:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:54:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:23,741 INFO L225 Difference]: With dead ends: 6898 [2022-03-01 17:54:23,741 INFO L226 Difference]: Without dead ends: 6891 [2022-03-01 17:54:23,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:23,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 181 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 184 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1371 Invalid, 0 Unknown, 412 Unchecked, 0.4s Time] [2022-03-01 17:54:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2022-03-01 17:54:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6224. [2022-03-01 17:54:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 4.441266270287643) internal successors, (27638), 6223 states have internal predecessors, (27638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 27638 transitions. [2022-03-01 17:54:23,852 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 27638 transitions. Word has length 30 [2022-03-01 17:54:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 6224 states and 27638 transitions. [2022-03-01 17:54:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 27638 transitions. [2022-03-01 17:54:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:23,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:23,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:23,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:24,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-01 17:54:24,079 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -833300334, now seen corresponding path program 3 times [2022-03-01 17:54:24,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:24,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363456542] [2022-03-01 17:54:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:24,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363456542] [2022-03-01 17:54:24,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363456542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:24,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069804308] [2022-03-01 17:54:24,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:24,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:24,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:24,273 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 17:54:24,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:24,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:54:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:24,823 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:24,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:24,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069804308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:24,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:24,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:24,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459672093] [2022-03-01 17:54:24,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:24,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:24,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:24,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:24,922 INFO L87 Difference]: Start difference. First operand 6224 states and 27638 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:25,812 INFO L93 Difference]: Finished difference Result 7140 states and 31245 transitions. [2022-03-01 17:54:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:54:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:25,830 INFO L225 Difference]: With dead ends: 7140 [2022-03-01 17:54:25,831 INFO L226 Difference]: Without dead ends: 7045 [2022-03-01 17:54:25,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:54:25,831 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:25,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 202 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1797 Invalid, 0 Unknown, 580 Unchecked, 0.6s Time] [2022-03-01 17:54:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-03-01 17:54:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6211. [2022-03-01 17:54:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6210 states have (on average 4.440740740740741) internal successors, (27577), 6210 states have internal predecessors, (27577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 27577 transitions. [2022-03-01 17:54:25,955 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 27577 transitions. Word has length 30 [2022-03-01 17:54:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:25,955 INFO L470 AbstractCegarLoop]: Abstraction has 6211 states and 27577 transitions. [2022-03-01 17:54:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 27577 transitions. [2022-03-01 17:54:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:25,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:25,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:25,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:26,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:26,178 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1658012505, now seen corresponding path program 80 times [2022-03-01 17:54:26,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:26,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406936530] [2022-03-01 17:54:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:26,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:26,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406936530] [2022-03-01 17:54:26,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406936530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:26,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215220661] [2022-03-01 17:54:26,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:26,401 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:26,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 17:54:26,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:26,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:54:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:26,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:26,960 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:26,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:26,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:26,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:26,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215220661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:27,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:27,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:27,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185394923] [2022-03-01 17:54:27,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:27,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:27,012 INFO L87 Difference]: Start difference. First operand 6211 states and 27577 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:28,819 INFO L93 Difference]: Finished difference Result 7871 states and 33788 transitions. [2022-03-01 17:54:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:54:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:28,839 INFO L225 Difference]: With dead ends: 7871 [2022-03-01 17:54:28,839 INFO L226 Difference]: Without dead ends: 7728 [2022-03-01 17:54:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:54:28,840 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 510 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:28,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 311 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2652 Invalid, 0 Unknown, 423 Unchecked, 0.9s Time] [2022-03-01 17:54:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2022-03-01 17:54:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6252. [2022-03-01 17:54:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6252 states, 6251 states have (on average 4.443449048152296) internal successors, (27776), 6251 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 27776 transitions. [2022-03-01 17:54:28,962 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 27776 transitions. Word has length 30 [2022-03-01 17:54:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:28,963 INFO L470 AbstractCegarLoop]: Abstraction has 6252 states and 27776 transitions. [2022-03-01 17:54:28,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 27776 transitions. [2022-03-01 17:54:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:28,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:28,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:28,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-01 17:54:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:29,187 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1654050101, now seen corresponding path program 81 times [2022-03-01 17:54:29,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:29,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826365989] [2022-03-01 17:54:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:29,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:29,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826365989] [2022-03-01 17:54:29,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826365989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:29,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158556236] [2022-03-01 17:54:29,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:29,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:29,407 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 17:54:29,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:54:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:29,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:29,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-03-01 17:54:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:31,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:31,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:31,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 9 [2022-03-01 17:54:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:31,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158556236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:31,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:31,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-03-01 17:54:31,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012375266] [2022-03-01 17:54:31,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:31,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:54:31,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:54:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:31,074 INFO L87 Difference]: Start difference. First operand 6252 states and 27776 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:36,477 INFO L93 Difference]: Finished difference Result 7609 states and 33222 transitions. [2022-03-01 17:54:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:54:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:36,502 INFO L225 Difference]: With dead ends: 7609 [2022-03-01 17:54:36,502 INFO L226 Difference]: Without dead ends: 7511 [2022-03-01 17:54:36,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:54:36,502 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 330 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1936 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:36,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 286 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1196 Invalid, 0 Unknown, 1936 Unchecked, 0.5s Time] [2022-03-01 17:54:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7511 states. [2022-03-01 17:54:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7511 to 6280. [2022-03-01 17:54:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 4.443541965281096) internal successors, (27901), 6279 states have internal predecessors, (27901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 27901 transitions. [2022-03-01 17:54:36,665 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 27901 transitions. Word has length 30 [2022-03-01 17:54:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:36,665 INFO L470 AbstractCegarLoop]: Abstraction has 6280 states and 27901 transitions. [2022-03-01 17:54:36,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 27901 transitions. [2022-03-01 17:54:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:36,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:36,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:36,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:36,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-01 17:54:36,883 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1512213559, now seen corresponding path program 82 times [2022-03-01 17:54:36,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:36,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167586389] [2022-03-01 17:54:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:37,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167586389] [2022-03-01 17:54:37,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167586389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:37,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99427164] [2022-03-01 17:54:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:37,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:37,103 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:37,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 17:54:37,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:37,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:54:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:37,728 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:37,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99427164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:37,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:37,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:54:37,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199604878] [2022-03-01 17:54:37,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:37,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:37,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:37,816 INFO L87 Difference]: Start difference. First operand 6280 states and 27901 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:39,039 INFO L93 Difference]: Finished difference Result 7234 states and 31625 transitions. [2022-03-01 17:54:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:54:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:39,057 INFO L225 Difference]: With dead ends: 7234 [2022-03-01 17:54:39,057 INFO L226 Difference]: Without dead ends: 7147 [2022-03-01 17:54:39,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:54:39,058 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 230 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:39,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 207 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2306 Invalid, 0 Unknown, 643 Unchecked, 0.9s Time] [2022-03-01 17:54:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2022-03-01 17:54:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6270. [2022-03-01 17:54:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 6269 states have (on average 4.446801722762801) internal successors, (27877), 6269 states have internal predecessors, (27877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 27877 transitions. [2022-03-01 17:54:39,204 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 27877 transitions. Word has length 30 [2022-03-01 17:54:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:39,204 INFO L470 AbstractCegarLoop]: Abstraction has 6270 states and 27877 transitions. [2022-03-01 17:54:39,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 27877 transitions. [2022-03-01 17:54:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:39,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:39,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:39,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:39,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:39,431 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1661676599, now seen corresponding path program 7 times [2022-03-01 17:54:39,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:39,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152105894] [2022-03-01 17:54:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:39,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:39,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152105894] [2022-03-01 17:54:39,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152105894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:39,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125545648] [2022-03-01 17:54:39,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:39,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:39,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:39,602 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:39,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 17:54:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:39,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:39,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:39,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:54:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:40,133 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:40,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:54:40,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:40,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:40,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:54:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:40,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125545648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:40,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:40,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:54:40,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439200719] [2022-03-01 17:54:40,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:54:40,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:54:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:54:40,188 INFO L87 Difference]: Start difference. First operand 6270 states and 27877 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:40,856 INFO L93 Difference]: Finished difference Result 6901 states and 30328 transitions. [2022-03-01 17:54:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:54:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:40,877 INFO L225 Difference]: With dead ends: 6901 [2022-03-01 17:54:40,878 INFO L226 Difference]: Without dead ends: 6862 [2022-03-01 17:54:40,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:54:40,878 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:40,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 139 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1239 Invalid, 0 Unknown, 547 Unchecked, 0.4s Time] [2022-03-01 17:54:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-03-01 17:54:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 6272. [2022-03-01 17:54:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6272 states, 6271 states have (on average 4.446499760803699) internal successors, (27884), 6271 states have internal predecessors, (27884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6272 states to 6272 states and 27884 transitions. [2022-03-01 17:54:41,015 INFO L78 Accepts]: Start accepts. Automaton has 6272 states and 27884 transitions. Word has length 30 [2022-03-01 17:54:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:41,015 INFO L470 AbstractCegarLoop]: Abstraction has 6272 states and 27884 transitions. [2022-03-01 17:54:41,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6272 states and 27884 transitions. [2022-03-01 17:54:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:41,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:41,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:41,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-01 17:54:41,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:41,244 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1053761045, now seen corresponding path program 6 times [2022-03-01 17:54:41,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:41,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661061579] [2022-03-01 17:54:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:41,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:41,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661061579] [2022-03-01 17:54:41,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661061579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:41,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108853930] [2022-03-01 17:54:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:41,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:41,478 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:41,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 17:54:41,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:54:41,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:41,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:41,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-03-01 17:54:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:47,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:47,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:47,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:47,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-03-01 17:54:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:47,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108853930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:47,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:47,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:54:47,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538952900] [2022-03-01 17:54:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:47,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:47,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=809, Unknown=1, NotChecked=0, Total=930 [2022-03-01 17:54:47,045 INFO L87 Difference]: Start difference. First operand 6272 states and 27884 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:48,328 INFO L93 Difference]: Finished difference Result 7940 states and 34325 transitions. [2022-03-01 17:54:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:54:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:48,350 INFO L225 Difference]: With dead ends: 7940 [2022-03-01 17:54:48,350 INFO L226 Difference]: Without dead ends: 7889 [2022-03-01 17:54:48,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=432, Invalid=2429, Unknown=1, NotChecked=0, Total=2862 [2022-03-01 17:54:48,351 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 464 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1869 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 223 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1061 Invalid, 0 Unknown, 1869 Unchecked, 0.4s Time] [2022-03-01 17:54:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7889 states. [2022-03-01 17:54:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7889 to 6271. [2022-03-01 17:54:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 4.446411483253589) internal successors, (27879), 6270 states have internal predecessors, (27879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 27879 transitions. [2022-03-01 17:54:48,479 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 27879 transitions. Word has length 30 [2022-03-01 17:54:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:48,479 INFO L470 AbstractCegarLoop]: Abstraction has 6271 states and 27879 transitions. [2022-03-01 17:54:48,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 27879 transitions. [2022-03-01 17:54:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:48,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:48,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:48,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:48,707 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1823681829, now seen corresponding path program 8 times [2022-03-01 17:54:48,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:48,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029224192] [2022-03-01 17:54:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:48,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:48,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029224192] [2022-03-01 17:54:48,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029224192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:48,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972959338] [2022-03-01 17:54:48,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:48,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:48,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:48,901 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:48,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 17:54:48,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:49,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-01 17:54:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:49,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:54:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:49,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972959338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:49,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:49,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:54:49,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198589618] [2022-03-01 17:54:49,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:49,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:49,935 INFO L87 Difference]: Start difference. First operand 6271 states and 27879 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:52,945 INFO L93 Difference]: Finished difference Result 9392 states and 39493 transitions. [2022-03-01 17:54:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:54:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:52,968 INFO L225 Difference]: With dead ends: 9392 [2022-03-01 17:54:52,969 INFO L226 Difference]: Without dead ends: 9306 [2022-03-01 17:54:52,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=703, Invalid=5617, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:54:52,969 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 624 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 3000 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1498 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:52,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 290 Invalid, 4740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3000 Invalid, 0 Unknown, 1498 Unchecked, 1.2s Time] [2022-03-01 17:54:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9306 states. [2022-03-01 17:54:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9306 to 6251. [2022-03-01 17:54:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6251 states, 6250 states have (on average 4.44848) internal successors, (27803), 6250 states have internal predecessors, (27803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6251 states to 6251 states and 27803 transitions. [2022-03-01 17:54:53,104 INFO L78 Accepts]: Start accepts. Automaton has 6251 states and 27803 transitions. Word has length 30 [2022-03-01 17:54:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:53,104 INFO L470 AbstractCegarLoop]: Abstraction has 6251 states and 27803 transitions. [2022-03-01 17:54:53,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6251 states and 27803 transitions. [2022-03-01 17:54:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:53,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:53,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:53,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-01 17:54:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:53,333 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash 536507945, now seen corresponding path program 83 times [2022-03-01 17:54:53,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:53,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683196188] [2022-03-01 17:54:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:53,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:53,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683196188] [2022-03-01 17:54:53,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683196188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:53,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36871413] [2022-03-01 17:54:53,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:53,481 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:53,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 17:54:53,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:53,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:54:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:53,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:54,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-03-01 17:54:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:54,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36871413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:54,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:54,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-01 17:54:54,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510852760] [2022-03-01 17:54:54,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:54,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:54:54,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:54:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:54:54,378 INFO L87 Difference]: Start difference. First operand 6251 states and 27803 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:58,934 INFO L93 Difference]: Finished difference Result 10493 states and 43420 transitions. [2022-03-01 17:54:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 17:54:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:58,960 INFO L225 Difference]: With dead ends: 10493 [2022-03-01 17:54:58,961 INFO L226 Difference]: Without dead ends: 10306 [2022-03-01 17:54:58,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1244, Invalid=11638, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 17:54:58,962 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 795 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 2935 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 6551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3377 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:58,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 354 Invalid, 6551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2935 Invalid, 0 Unknown, 3377 Unchecked, 1.3s Time] [2022-03-01 17:54:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10306 states. [2022-03-01 17:54:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10306 to 6307. [2022-03-01 17:54:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6307 states, 6306 states have (on average 4.447193149381541) internal successors, (28044), 6306 states have internal predecessors, (28044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 28044 transitions. [2022-03-01 17:54:59,164 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 28044 transitions. Word has length 30 [2022-03-01 17:54:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:59,164 INFO L470 AbstractCegarLoop]: Abstraction has 6307 states and 28044 transitions. [2022-03-01 17:54:59,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 28044 transitions. [2022-03-01 17:54:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:59,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:59,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:59,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-01 17:54:59,387 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 243104938, now seen corresponding path program 2 times [2022-03-01 17:54:59,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:59,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800777355] [2022-03-01 17:54:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:59,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800777355] [2022-03-01 17:54:59,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800777355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:59,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678108222] [2022-03-01 17:54:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:59,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:59,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:59,571 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:59,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 17:54:59,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:59,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:59,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:55:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9 [2022-03-01 17:55:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678108222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:00,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:00,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-03-01 17:55:00,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234671781] [2022-03-01 17:55:00,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:00,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:55:00,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:55:00,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:55:00,720 INFO L87 Difference]: Start difference. First operand 6307 states and 28044 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:06,563 INFO L93 Difference]: Finished difference Result 10470 states and 43552 transitions. [2022-03-01 17:55:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 17:55:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:06,594 INFO L225 Difference]: With dead ends: 10470 [2022-03-01 17:55:06,594 INFO L226 Difference]: Without dead ends: 10275 [2022-03-01 17:55:06,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1200, Invalid=12372, Unknown=0, NotChecked=0, Total=13572 [2022-03-01 17:55:06,596 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1063 mSDsluCounter, 4164 mSDsCounter, 0 mSdLazyCounter, 5216 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 9038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 5216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3465 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:06,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 506 Invalid, 9038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 5216 Invalid, 0 Unknown, 3465 Unchecked, 2.0s Time] [2022-03-01 17:55:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2022-03-01 17:55:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 6367. [2022-03-01 17:55:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 4.446591266101162) internal successors, (28307), 6366 states have internal predecessors, (28307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 28307 transitions. [2022-03-01 17:55:06,782 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 28307 transitions. Word has length 30 [2022-03-01 17:55:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:06,782 INFO L470 AbstractCegarLoop]: Abstraction has 6367 states and 28307 transitions. [2022-03-01 17:55:06,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 28307 transitions. [2022-03-01 17:55:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:06,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:06,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:06,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:07,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-01 17:55:07,012 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1591109996, now seen corresponding path program 43 times [2022-03-01 17:55:07,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:07,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549666883] [2022-03-01 17:55:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:07,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:07,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549666883] [2022-03-01 17:55:07,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549666883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:07,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979892444] [2022-03-01 17:55:07,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:07,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:07,182 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:07,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 17:55:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:07,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:07,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:07,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:07,583 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:07,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:07,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:07,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979892444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:07,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:07,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:07,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303571492] [2022-03-01 17:55:07,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:07,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:07,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:07,636 INFO L87 Difference]: Start difference. First operand 6367 states and 28307 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:08,512 INFO L93 Difference]: Finished difference Result 6932 states and 30519 transitions. [2022-03-01 17:55:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:55:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:08,531 INFO L225 Difference]: With dead ends: 6932 [2022-03-01 17:55:08,531 INFO L226 Difference]: Without dead ends: 6857 [2022-03-01 17:55:08,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:55:08,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:08,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 139 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1845 Invalid, 0 Unknown, 316 Unchecked, 0.5s Time] [2022-03-01 17:55:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2022-03-01 17:55:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 6343. [2022-03-01 17:55:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 4.4479659413434245) internal successors, (28209), 6342 states have internal predecessors, (28209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 28209 transitions. [2022-03-01 17:55:08,650 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 28209 transitions. Word has length 30 [2022-03-01 17:55:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:08,651 INFO L470 AbstractCegarLoop]: Abstraction has 6343 states and 28209 transitions. [2022-03-01 17:55:08,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 28209 transitions. [2022-03-01 17:55:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:08,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:08,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:08,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:08,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:08,876 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1520425842, now seen corresponding path program 44 times [2022-03-01 17:55:08,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:08,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929268068] [2022-03-01 17:55:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:09,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929268068] [2022-03-01 17:55:09,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929268068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:09,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725772845] [2022-03-01 17:55:09,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:09,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:09,033 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 17:55:09,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:09,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:09,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:09,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:09,462 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:09,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:09,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:09,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:09,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725772845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:09,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:09,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:55:09,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608717423] [2022-03-01 17:55:09,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:55:09,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:55:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:55:09,515 INFO L87 Difference]: Start difference. First operand 6343 states and 28209 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:11,059 INFO L93 Difference]: Finished difference Result 7112 states and 31140 transitions. [2022-03-01 17:55:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:55:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:11,077 INFO L225 Difference]: With dead ends: 7112 [2022-03-01 17:55:11,077 INFO L226 Difference]: Without dead ends: 7021 [2022-03-01 17:55:11,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=2751, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:55:11,078 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 252 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:11,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 168 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2492 Invalid, 0 Unknown, 347 Unchecked, 0.8s Time] [2022-03-01 17:55:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7021 states. [2022-03-01 17:55:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7021 to 6348. [2022-03-01 17:55:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.448400819284702) internal successors, (28234), 6347 states have internal predecessors, (28234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 28234 transitions. [2022-03-01 17:55:11,203 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 28234 transitions. Word has length 30 [2022-03-01 17:55:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:11,203 INFO L470 AbstractCegarLoop]: Abstraction has 6348 states and 28234 transitions. [2022-03-01 17:55:11,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 28234 transitions. [2022-03-01 17:55:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:11,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:11,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:11,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-01 17:55:11,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-01 17:55:11,427 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 944566638, now seen corresponding path program 45 times [2022-03-01 17:55:11,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:11,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136880285] [2022-03-01 17:55:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:11,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:11,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:11,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136880285] [2022-03-01 17:55:11,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136880285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:11,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498113044] [2022-03-01 17:55:11,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:11,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:11,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:11,667 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:11,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 17:55:11,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:55:11,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:11,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:11,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-03-01 17:55:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:12,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:12,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:12,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:55:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498113044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:12,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:12,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 17:55:12,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802805507] [2022-03-01 17:55:12,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:12,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:12,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:12,800 INFO L87 Difference]: Start difference. First operand 6348 states and 28234 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:15,802 INFO L93 Difference]: Finished difference Result 8237 states and 35805 transitions. [2022-03-01 17:55:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:55:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:15,824 INFO L225 Difference]: With dead ends: 8237 [2022-03-01 17:55:15,824 INFO L226 Difference]: Without dead ends: 8167 [2022-03-01 17:55:15,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=716, Invalid=4834, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:55:15,825 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 376 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1667 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:15,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 163 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1963 Invalid, 0 Unknown, 1667 Unchecked, 0.8s Time] [2022-03-01 17:55:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2022-03-01 17:55:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 6383. [2022-03-01 17:55:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 4.440457536822313) internal successors, (28339), 6382 states have internal predecessors, (28339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 28339 transitions. [2022-03-01 17:55:16,010 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 28339 transitions. Word has length 30 [2022-03-01 17:55:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:16,010 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 28339 transitions. [2022-03-01 17:55:16,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 28339 transitions. [2022-03-01 17:55:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:16,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:16,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:16,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-01 17:55:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-01 17:55:16,227 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 748053133, now seen corresponding path program 7 times [2022-03-01 17:55:16,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:16,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975628099] [2022-03-01 17:55:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:16,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975628099] [2022-03-01 17:55:16,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975628099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674649069] [2022-03-01 17:55:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:16,450 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:16,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 17:55:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:16,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:16,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:17,052 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:17,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:17,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:17,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:17,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674649069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:17,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:17,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:17,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294481019] [2022-03-01 17:55:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:17,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:17,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:17,129 INFO L87 Difference]: Start difference. First operand 6383 states and 28339 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:18,414 INFO L93 Difference]: Finished difference Result 6934 states and 30478 transitions. [2022-03-01 17:55:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:55:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:18,435 INFO L225 Difference]: With dead ends: 6934 [2022-03-01 17:55:18,435 INFO L226 Difference]: Without dead ends: 6885 [2022-03-01 17:55:18,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:55:18,435 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 157 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2303 Invalid, 0 Unknown, 255 Unchecked, 0.9s Time] [2022-03-01 17:55:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2022-03-01 17:55:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6383. [2022-03-01 17:55:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 4.440457536822313) internal successors, (28339), 6382 states have internal predecessors, (28339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 28339 transitions. [2022-03-01 17:55:18,565 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 28339 transitions. Word has length 30 [2022-03-01 17:55:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:18,565 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 28339 transitions. [2022-03-01 17:55:18,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 28339 transitions. [2022-03-01 17:55:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:18,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:18,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:18,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:18,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-01 17:55:18,793 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1870047206, now seen corresponding path program 46 times [2022-03-01 17:55:18,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:18,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27490588] [2022-03-01 17:55:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:18,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:19,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27490588] [2022-03-01 17:55:19,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27490588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:19,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745454335] [2022-03-01 17:55:19,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:19,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:19,018 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:19,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 17:55:19,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:19,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:19,634 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:19,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:19,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:19,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:19,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745454335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:19,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:19,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-03-01 17:55:19,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271569461] [2022-03-01 17:55:19,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:19,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:19,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:19,719 INFO L87 Difference]: Start difference. First operand 6383 states and 28339 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:20,658 INFO L93 Difference]: Finished difference Result 6931 states and 30484 transitions. [2022-03-01 17:55:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:55:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:20,679 INFO L225 Difference]: With dead ends: 6931 [2022-03-01 17:55:20,679 INFO L226 Difference]: Without dead ends: 6857 [2022-03-01 17:55:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:20,679 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:20,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 132 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1737 Invalid, 0 Unknown, 237 Unchecked, 0.7s Time] [2022-03-01 17:55:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2022-03-01 17:55:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 6380. [2022-03-01 17:55:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 4.440821445367613) internal successors, (28328), 6379 states have internal predecessors, (28328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 28328 transitions. [2022-03-01 17:55:20,801 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 28328 transitions. Word has length 30 [2022-03-01 17:55:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:20,801 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 28328 transitions. [2022-03-01 17:55:20,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 28328 transitions. [2022-03-01 17:55:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:20,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:20,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:20,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:21,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:21,030 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1221769510, now seen corresponding path program 47 times [2022-03-01 17:55:21,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:21,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290847074] [2022-03-01 17:55:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:21,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:21,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290847074] [2022-03-01 17:55:21,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290847074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:21,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038336701] [2022-03-01 17:55:21,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:21,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:21,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:21,243 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:21,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 17:55:21,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:55:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:21,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:21,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2022-03-01 17:55:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:28,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-03-01 17:55:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:28,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038336701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:28,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:28,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:55:28,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986703462] [2022-03-01 17:55:28,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:28,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:28,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=829, Unknown=2, NotChecked=0, Total=930 [2022-03-01 17:55:28,307 INFO L87 Difference]: Start difference. First operand 6380 states and 28328 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:30,122 INFO L93 Difference]: Finished difference Result 7331 states and 32206 transitions. [2022-03-01 17:55:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:55:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:30,141 INFO L225 Difference]: With dead ends: 7331 [2022-03-01 17:55:30,142 INFO L226 Difference]: Without dead ends: 7270 [2022-03-01 17:55:30,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=425, Invalid=2765, Unknown=2, NotChecked=0, Total=3192 [2022-03-01 17:55:30,142 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 342 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:30,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 206 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2115 Invalid, 0 Unknown, 1208 Unchecked, 0.8s Time] [2022-03-01 17:55:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2022-03-01 17:55:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6379. [2022-03-01 17:55:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6379 states, 6378 states have (on average 4.441047350266541) internal successors, (28325), 6378 states have internal predecessors, (28325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6379 states to 6379 states and 28325 transitions. [2022-03-01 17:55:30,263 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 28325 transitions. Word has length 30 [2022-03-01 17:55:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:30,263 INFO L470 AbstractCegarLoop]: Abstraction has 6379 states and 28325 transitions. [2022-03-01 17:55:30,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 28325 transitions. [2022-03-01 17:55:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:30,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:30,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:30,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:30,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:30,492 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1775554242, now seen corresponding path program 48 times [2022-03-01 17:55:30,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:30,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908122404] [2022-03-01 17:55:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:30,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908122404] [2022-03-01 17:55:30,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908122404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919752341] [2022-03-01 17:55:30,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:30,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:30,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:30,648 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:30,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 17:55:30,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:55:30,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:30,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:30,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2022-03-01 17:55:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:31,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:55:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919752341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:31,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:31,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-03-01 17:55:31,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677585317] [2022-03-01 17:55:31,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:31,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:55:31,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:55:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:31,294 INFO L87 Difference]: Start difference. First operand 6379 states and 28325 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:36,672 INFO L93 Difference]: Finished difference Result 10071 states and 41893 transitions. [2022-03-01 17:55:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-01 17:55:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:36,697 INFO L225 Difference]: With dead ends: 10071 [2022-03-01 17:55:36,697 INFO L226 Difference]: Without dead ends: 9796 [2022-03-01 17:55:36,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1630, Invalid=11942, Unknown=0, NotChecked=0, Total=13572 [2022-03-01 17:55:36,698 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1184 mSDsluCounter, 2179 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:36,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 349 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 4362 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 17:55:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9796 states. [2022-03-01 17:55:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9796 to 6455. [2022-03-01 17:55:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6454 states have (on average 4.439572358227456) internal successors, (28653), 6454 states have internal predecessors, (28653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 28653 transitions. [2022-03-01 17:55:36,845 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 28653 transitions. Word has length 30 [2022-03-01 17:55:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 6455 states and 28653 transitions. [2022-03-01 17:55:36,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 28653 transitions. [2022-03-01 17:55:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:36,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:36,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:36,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-01 17:55:37,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:37,062 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 202007004, now seen corresponding path program 49 times [2022-03-01 17:55:37,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:37,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237649005] [2022-03-01 17:55:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:37,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237649005] [2022-03-01 17:55:37,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237649005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253788431] [2022-03-01 17:55:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:37,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:37,230 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:37,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 17:55:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:37,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:55:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:37,611 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:37,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:55:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253788431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:37,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:37,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:55:37,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478187633] [2022-03-01 17:55:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:37,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:37,716 INFO L87 Difference]: Start difference. First operand 6455 states and 28653 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:39,153 INFO L93 Difference]: Finished difference Result 7909 states and 34496 transitions. [2022-03-01 17:55:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:55:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:39,175 INFO L225 Difference]: With dead ends: 7909 [2022-03-01 17:55:39,175 INFO L226 Difference]: Without dead ends: 7842 [2022-03-01 17:55:39,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:55:39,176 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 347 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:39,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 150 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2721 Invalid, 0 Unknown, 191 Unchecked, 0.8s Time] [2022-03-01 17:55:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-03-01 17:55:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 6444. [2022-03-01 17:55:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6444 states, 6443 states have (on average 4.4407884525842) internal successors, (28612), 6443 states have internal predecessors, (28612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 28612 transitions. [2022-03-01 17:55:39,327 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 28612 transitions. Word has length 30 [2022-03-01 17:55:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:39,327 INFO L470 AbstractCegarLoop]: Abstraction has 6444 states and 28612 transitions. [2022-03-01 17:55:39,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 28612 transitions. [2022-03-01 17:55:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:39,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:39,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:39,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-01 17:55:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:39,555 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash -846251220, now seen corresponding path program 50 times [2022-03-01 17:55:39,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:39,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278848353] [2022-03-01 17:55:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:39,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278848353] [2022-03-01 17:55:39,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278848353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582548559] [2022-03-01 17:55:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:39,717 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:39,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 17:55:39,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:39,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:40,159 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:40,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:40,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582548559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:40,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:40,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:40,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568587253] [2022-03-01 17:55:40,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:40,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:40,209 INFO L87 Difference]: Start difference. First operand 6444 states and 28612 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:41,325 INFO L93 Difference]: Finished difference Result 7015 states and 30821 transitions. [2022-03-01 17:55:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:55:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:41,344 INFO L225 Difference]: With dead ends: 7015 [2022-03-01 17:55:41,344 INFO L226 Difference]: Without dead ends: 6964 [2022-03-01 17:55:41,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:55:41,344 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:41,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 144 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2342 Invalid, 0 Unknown, 144 Unchecked, 0.8s Time] [2022-03-01 17:55:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6964 states. [2022-03-01 17:55:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6964 to 6452. [2022-03-01 17:55:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 4.440241822973182) internal successors, (28644), 6451 states have internal predecessors, (28644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 28644 transitions. [2022-03-01 17:55:41,466 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 28644 transitions. Word has length 30 [2022-03-01 17:55:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:41,466 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 28644 transitions. [2022-03-01 17:55:41,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 28644 transitions. [2022-03-01 17:55:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:41,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:41,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:41,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-01 17:55:41,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:41,695 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1727271557, now seen corresponding path program 8 times [2022-03-01 17:55:41,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:41,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823551437] [2022-03-01 17:55:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:41,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823551437] [2022-03-01 17:55:41,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823551437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:41,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971638061] [2022-03-01 17:55:41,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:41,902 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 17:55:41,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:42,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 17:55:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:42,369 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:42,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:55:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971638061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:42,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:42,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:55:42,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818348030] [2022-03-01 17:55:42,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:55:42,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:55:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:55:42,429 INFO L87 Difference]: Start difference. First operand 6452 states and 28644 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:44,589 INFO L93 Difference]: Finished difference Result 7921 states and 34625 transitions. [2022-03-01 17:55:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:55:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:44,611 INFO L225 Difference]: With dead ends: 7921 [2022-03-01 17:55:44,611 INFO L226 Difference]: Without dead ends: 7830 [2022-03-01 17:55:44,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:55:44,612 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:44,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 242 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 4048 Invalid, 0 Unknown, 55 Unchecked, 1.5s Time] [2022-03-01 17:55:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2022-03-01 17:55:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 6292. [2022-03-01 17:55:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6291 states have (on average 4.449848990621523) internal successors, (27994), 6291 states have internal predecessors, (27994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 27994 transitions. [2022-03-01 17:55:44,748 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 27994 transitions. Word has length 30 [2022-03-01 17:55:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:44,748 INFO L470 AbstractCegarLoop]: Abstraction has 6292 states and 27994 transitions. [2022-03-01 17:55:44,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 27994 transitions. [2022-03-01 17:55:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:44,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:44,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:44,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:44,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:44,979 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1680302641, now seen corresponding path program 84 times [2022-03-01 17:55:44,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:44,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032221222] [2022-03-01 17:55:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:45,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032221222] [2022-03-01 17:55:45,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032221222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:45,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862561652] [2022-03-01 17:55:45,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:45,250 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:45,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 17:55:45,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:55:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:45,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:45,820 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:45,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:45,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:45,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:45,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862561652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:45,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:45,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:45,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050519056] [2022-03-01 17:55:45,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:45,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:45,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:45,937 INFO L87 Difference]: Start difference. First operand 6292 states and 27994 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:48,028 INFO L93 Difference]: Finished difference Result 7057 states and 31006 transitions. [2022-03-01 17:55:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:55:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:48,048 INFO L225 Difference]: With dead ends: 7057 [2022-03-01 17:55:48,048 INFO L226 Difference]: Without dead ends: 7006 [2022-03-01 17:55:48,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:55:48,049 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 241 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:48,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 171 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2394 Invalid, 0 Unknown, 284 Unchecked, 1.0s Time] [2022-03-01 17:55:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-03-01 17:55:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 6345. [2022-03-01 17:55:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6345 states, 6344 states have (on average 4.450662042875158) internal successors, (28235), 6344 states have internal predecessors, (28235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 28235 transitions. [2022-03-01 17:55:48,172 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 28235 transitions. Word has length 30 [2022-03-01 17:55:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:48,173 INFO L470 AbstractCegarLoop]: Abstraction has 6345 states and 28235 transitions. [2022-03-01 17:55:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 28235 transitions. [2022-03-01 17:55:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:48,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:48,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:48,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-01 17:55:48,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-01 17:55:48,402 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:48,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1476970643, now seen corresponding path program 85 times [2022-03-01 17:55:48,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:48,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391276678] [2022-03-01 17:55:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:48,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391276678] [2022-03-01 17:55:48,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391276678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:48,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108578907] [2022-03-01 17:55:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:48,692 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:48,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 17:55:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:48,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 17:55:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:49,225 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:49,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:49,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:49,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108578907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:49,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:49,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:49,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462504730] [2022-03-01 17:55:49,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:49,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:49,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:49,346 INFO L87 Difference]: Start difference. First operand 6345 states and 28235 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:51,865 INFO L93 Difference]: Finished difference Result 6947 states and 30538 transitions. [2022-03-01 17:55:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:55:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:51,883 INFO L225 Difference]: With dead ends: 6947 [2022-03-01 17:55:51,883 INFO L226 Difference]: Without dead ends: 6876 [2022-03-01 17:55:51,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=2757, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:55:51,884 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 238 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:51,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 191 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2328 Invalid, 0 Unknown, 719 Unchecked, 1.0s Time] [2022-03-01 17:55:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2022-03-01 17:55:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 6330. [2022-03-01 17:55:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 6329 states have (on average 4.450624111234002) internal successors, (28168), 6329 states have internal predecessors, (28168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 28168 transitions. [2022-03-01 17:55:51,997 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 28168 transitions. Word has length 30 [2022-03-01 17:55:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:51,998 INFO L470 AbstractCegarLoop]: Abstraction has 6330 states and 28168 transitions. [2022-03-01 17:55:51,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 28168 transitions. [2022-03-01 17:55:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:52,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:52,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:52,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:52,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-01 17:55:52,221 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1571658135, now seen corresponding path program 1 times [2022-03-01 17:55:52,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:52,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130803216] [2022-03-01 17:55:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:52,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130803216] [2022-03-01 17:55:52,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130803216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:52,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969989027] [2022-03-01 17:55:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:52,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:52,460 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:52,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 17:55:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:52,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:52,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:52,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:52,895 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:52,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:52,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969989027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:52,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:52,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 17:55:52,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990813341] [2022-03-01 17:55:52,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:52,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:52,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:52,943 INFO L87 Difference]: Start difference. First operand 6330 states and 28168 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:53,650 INFO L93 Difference]: Finished difference Result 6778 states and 29943 transitions. [2022-03-01 17:55:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:55:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:53,668 INFO L225 Difference]: With dead ends: 6778 [2022-03-01 17:55:53,668 INFO L226 Difference]: Without dead ends: 6737 [2022-03-01 17:55:53,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:55:53,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:53,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 115 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1397 Invalid, 0 Unknown, 313 Unchecked, 0.4s Time] [2022-03-01 17:55:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2022-03-01 17:55:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 6347. [2022-03-01 17:55:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6347 states, 6346 states have (on average 4.449889694295619) internal successors, (28239), 6346 states have internal predecessors, (28239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6347 states to 6347 states and 28239 transitions. [2022-03-01 17:55:53,782 INFO L78 Accepts]: Start accepts. Automaton has 6347 states and 28239 transitions. Word has length 30 [2022-03-01 17:55:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:53,782 INFO L470 AbstractCegarLoop]: Abstraction has 6347 states and 28239 transitions. [2022-03-01 17:55:53,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6347 states and 28239 transitions. [2022-03-01 17:55:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:53,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:53,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:54,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-01 17:55:54,010 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 335385315, now seen corresponding path program 2 times [2022-03-01 17:55:54,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:54,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962240817] [2022-03-01 17:55:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:54,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:54,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962240817] [2022-03-01 17:55:54,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962240817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:54,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376155728] [2022-03-01 17:55:54,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:54,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:54,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:54,184 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:54,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 17:55:54,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:54,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 17:55:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:54,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:54,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:54,976 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:55:54,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:55:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:55,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376155728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:55,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:55,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 17:55:55,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801118751] [2022-03-01 17:55:55,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:55,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:55,108 INFO L87 Difference]: Start difference. First operand 6347 states and 28239 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:56,094 INFO L93 Difference]: Finished difference Result 6695 states and 29584 transitions. [2022-03-01 17:55:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:55:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:56,112 INFO L225 Difference]: With dead ends: 6695 [2022-03-01 17:55:56,112 INFO L226 Difference]: Without dead ends: 6688 [2022-03-01 17:55:56,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:55:56,113 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:56,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1475 Invalid, 0 Unknown, 502 Unchecked, 0.6s Time] [2022-03-01 17:55:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2022-03-01 17:55:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 6391. [2022-03-01 17:55:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 4.44585289514867) internal successors, (28409), 6390 states have internal predecessors, (28409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 28409 transitions. [2022-03-01 17:55:56,268 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 28409 transitions. Word has length 30 [2022-03-01 17:55:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:56,268 INFO L470 AbstractCegarLoop]: Abstraction has 6391 states and 28409 transitions. [2022-03-01 17:55:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 28409 transitions. [2022-03-01 17:55:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:56,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:56,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:56,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-01 17:55:56,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-01 17:55:56,495 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 336308836, now seen corresponding path program 1 times [2022-03-01 17:55:56,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:56,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628895048] [2022-03-01 17:55:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:56,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:56,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628895048] [2022-03-01 17:55:56,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628895048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:56,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516116956] [2022-03-01 17:55:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:56,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:56,716 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:56,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 17:55:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:57,137 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:57,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:57,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:57,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:57,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:57,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516116956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:57,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:57,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-01 17:55:57,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522479293] [2022-03-01 17:55:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:57,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:55:57,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:55:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:57,188 INFO L87 Difference]: Start difference. First operand 6391 states and 28409 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:57,997 INFO L93 Difference]: Finished difference Result 6853 states and 30206 transitions. [2022-03-01 17:55:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:55:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:58,015 INFO L225 Difference]: With dead ends: 6853 [2022-03-01 17:55:58,015 INFO L226 Difference]: Without dead ends: 6770 [2022-03-01 17:55:58,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:58,016 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:58,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 119 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1478 Invalid, 0 Unknown, 259 Unchecked, 0.5s Time] [2022-03-01 17:55:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2022-03-01 17:55:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6369. [2022-03-01 17:55:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 4.4486494974874375) internal successors, (28329), 6368 states have internal predecessors, (28329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 28329 transitions. [2022-03-01 17:55:58,125 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 28329 transitions. Word has length 30 [2022-03-01 17:55:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:58,125 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 28329 transitions. [2022-03-01 17:55:58,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 28329 transitions. [2022-03-01 17:55:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:58,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:58,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:58,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:58,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:58,353 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1224881418, now seen corresponding path program 1 times [2022-03-01 17:55:58,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:58,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789350600] [2022-03-01 17:55:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:58,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:58,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789350600] [2022-03-01 17:55:58,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789350600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:58,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915574199] [2022-03-01 17:55:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:58,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:58,556 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:58,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 17:55:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:58,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:58,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:55:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:58,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:59,133 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:59,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:55:59,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:59,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:55:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:59,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915574199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:59,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:59,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 17:55:59,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621780630] [2022-03-01 17:55:59,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:59,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:59,208 INFO L87 Difference]: Start difference. First operand 6369 states and 28329 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:00,152 INFO L93 Difference]: Finished difference Result 6768 states and 29896 transitions. [2022-03-01 17:56:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:56:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:00,170 INFO L225 Difference]: With dead ends: 6768 [2022-03-01 17:56:00,170 INFO L226 Difference]: Without dead ends: 6727 [2022-03-01 17:56:00,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:00,171 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 109 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:00,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 161 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1466 Invalid, 0 Unknown, 526 Unchecked, 0.6s Time] [2022-03-01 17:56:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-03-01 17:56:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6380. [2022-03-01 17:56:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 4.4470920206928986) internal successors, (28368), 6379 states have internal predecessors, (28368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 28368 transitions. [2022-03-01 17:56:00,287 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 28368 transitions. Word has length 30 [2022-03-01 17:56:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:00,287 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 28368 transitions. [2022-03-01 17:56:00,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 28368 transitions. [2022-03-01 17:56:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:00,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:00,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:00,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:00,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-03-01 17:56:00,516 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1633209866, now seen corresponding path program 2 times [2022-03-01 17:56:00,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:00,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405323192] [2022-03-01 17:56:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:00,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:00,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405323192] [2022-03-01 17:56:00,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405323192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:00,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337210407] [2022-03-01 17:56:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:00,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:00,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:00,665 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:00,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-01 17:56:00,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:00,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:00,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:00,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-01 17:56:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:01,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:01,250 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:56:01,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:56:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337210407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:01,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:01,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 17:56:01,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773355173] [2022-03-01 17:56:01,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:01,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:01,355 INFO L87 Difference]: Start difference. First operand 6380 states and 28368 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:02,252 INFO L93 Difference]: Finished difference Result 6953 states and 30620 transitions. [2022-03-01 17:56:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:56:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:02,269 INFO L225 Difference]: With dead ends: 6953 [2022-03-01 17:56:02,270 INFO L226 Difference]: Without dead ends: 6888 [2022-03-01 17:56:02,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:56:02,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:02,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 117 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1491 Invalid, 0 Unknown, 583 Unchecked, 0.5s Time] [2022-03-01 17:56:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6888 states. [2022-03-01 17:56:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 6393. [2022-03-01 17:56:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 4.446495619524406) internal successors, (28422), 6392 states have internal predecessors, (28422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 28422 transitions. [2022-03-01 17:56:02,385 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 28422 transitions. Word has length 30 [2022-03-01 17:56:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 6393 states and 28422 transitions. [2022-03-01 17:56:02,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 28422 transitions. [2022-03-01 17:56:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:02,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:02,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:02,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-01 17:56:02,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:02,611 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:02,611 INFO L85 PathProgramCache]: Analyzing trace with hash -26172115, now seen corresponding path program 3 times [2022-03-01 17:56:02,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:02,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862628232] [2022-03-01 17:56:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:02,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:02,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862628232] [2022-03-01 17:56:02,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862628232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:02,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080248263] [2022-03-01 17:56:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:02,805 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:02,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-01 17:56:02,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:03,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:03,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:56:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:03,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:03,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:03,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:56:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:04,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080248263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:04,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:04,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 17:56:04,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451645262] [2022-03-01 17:56:04,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:04,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:04,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:04,070 INFO L87 Difference]: Start difference. First operand 6393 states and 28422 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:07,185 INFO L93 Difference]: Finished difference Result 8316 states and 36524 transitions. [2022-03-01 17:56:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:56:07,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:07,207 INFO L225 Difference]: With dead ends: 8316 [2022-03-01 17:56:07,208 INFO L226 Difference]: Without dead ends: 8255 [2022-03-01 17:56:07,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=807, Invalid=4743, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:56:07,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2274 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 165 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1457 Invalid, 0 Unknown, 2274 Unchecked, 0.7s Time] [2022-03-01 17:56:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2022-03-01 17:56:07,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 6477. [2022-03-01 17:56:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6477 states, 6476 states have (on average 4.452748610253242) internal successors, (28836), 6476 states have internal predecessors, (28836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 28836 transitions. [2022-03-01 17:56:07,344 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 28836 transitions. Word has length 30 [2022-03-01 17:56:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:07,344 INFO L470 AbstractCegarLoop]: Abstraction has 6477 states and 28836 transitions. [2022-03-01 17:56:07,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 28836 transitions. [2022-03-01 17:56:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:07,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:07,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:07,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-01 17:56:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:07,571 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1602612470, now seen corresponding path program 3 times [2022-03-01 17:56:07,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:07,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315961859] [2022-03-01 17:56:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:07,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:07,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315961859] [2022-03-01 17:56:07,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315961859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:07,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792331337] [2022-03-01 17:56:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:07,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:07,753 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:07,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-01 17:56:07,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:56:07,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:08,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-01 17:56:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:08,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:56:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792331337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:08,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:08,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:56:08,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346040724] [2022-03-01 17:56:08,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:56:08,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:56:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:08,745 INFO L87 Difference]: Start difference. First operand 6477 states and 28836 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:11,945 INFO L93 Difference]: Finished difference Result 9019 states and 38457 transitions. [2022-03-01 17:56:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:56:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:11,968 INFO L225 Difference]: With dead ends: 9019 [2022-03-01 17:56:11,968 INFO L226 Difference]: Without dead ends: 8877 [2022-03-01 17:56:11,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=610, Invalid=5090, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 17:56:11,969 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1926 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:11,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 278 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2729 Invalid, 0 Unknown, 1926 Unchecked, 1.2s Time] [2022-03-01 17:56:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2022-03-01 17:56:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 6479. [2022-03-01 17:56:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 4.452917567150355) internal successors, (28846), 6478 states have internal predecessors, (28846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 28846 transitions. [2022-03-01 17:56:12,107 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 28846 transitions. Word has length 30 [2022-03-01 17:56:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:12,107 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 28846 transitions. [2022-03-01 17:56:12,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 28846 transitions. [2022-03-01 17:56:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:12,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:12,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:12,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:12,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-03-01 17:56:12,333 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1037073236, now seen corresponding path program 4 times [2022-03-01 17:56:12,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:12,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840225444] [2022-03-01 17:56:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:12,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840225444] [2022-03-01 17:56:12,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840225444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:12,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870171979] [2022-03-01 17:56:12,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:12,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:12,509 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:12,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-01 17:56:12,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:12,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:12,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:12,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:12,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:56:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:13,030 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:13,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:13,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:13,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:13,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870171979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:13,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:13,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:13,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495970463] [2022-03-01 17:56:13,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:13,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:13,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:13,127 INFO L87 Difference]: Start difference. First operand 6479 states and 28846 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:14,211 INFO L93 Difference]: Finished difference Result 6872 states and 30385 transitions. [2022-03-01 17:56:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:56:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:14,229 INFO L225 Difference]: With dead ends: 6872 [2022-03-01 17:56:14,230 INFO L226 Difference]: Without dead ends: 6799 [2022-03-01 17:56:14,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:14,230 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:14,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 146 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2070 Invalid, 0 Unknown, 496 Unchecked, 0.7s Time] [2022-03-01 17:56:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6799 states. [2022-03-01 17:56:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 6497. [2022-03-01 17:56:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6497 states, 6496 states have (on average 4.453509852216749) internal successors, (28930), 6496 states have internal predecessors, (28930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6497 states to 6497 states and 28930 transitions. [2022-03-01 17:56:14,356 INFO L78 Accepts]: Start accepts. Automaton has 6497 states and 28930 transitions. Word has length 30 [2022-03-01 17:56:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:14,356 INFO L470 AbstractCegarLoop]: Abstraction has 6497 states and 28930 transitions. [2022-03-01 17:56:14,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6497 states and 28930 transitions. [2022-03-01 17:56:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:14,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:14,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:14,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:14,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,585 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 869970214, now seen corresponding path program 5 times [2022-03-01 17:56:14,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:14,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274397296] [2022-03-01 17:56:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:14,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:14,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274397296] [2022-03-01 17:56:14,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274397296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:14,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540927437] [2022-03-01 17:56:14,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:14,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:14,765 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:14,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-01 17:56:14,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:56:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:15,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:15,169 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:15,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:15,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:15,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:15,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540927437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:15,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:15,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-03-01 17:56:15,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130901089] [2022-03-01 17:56:15,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:15,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:15,220 INFO L87 Difference]: Start difference. First operand 6497 states and 28930 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:16,071 INFO L93 Difference]: Finished difference Result 6873 states and 30389 transitions. [2022-03-01 17:56:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:56:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:16,088 INFO L225 Difference]: With dead ends: 6873 [2022-03-01 17:56:16,088 INFO L226 Difference]: Without dead ends: 6816 [2022-03-01 17:56:16,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:56:16,088 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:16,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 124 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1842 Invalid, 0 Unknown, 438 Unchecked, 0.6s Time] [2022-03-01 17:56:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6816 states. [2022-03-01 17:56:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6816 to 6522. [2022-03-01 17:56:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6522 states, 6521 states have (on average 4.4533047078668915) internal successors, (29040), 6521 states have internal predecessors, (29040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6522 states to 6522 states and 29040 transitions. [2022-03-01 17:56:16,200 INFO L78 Accepts]: Start accepts. Automaton has 6522 states and 29040 transitions. Word has length 30 [2022-03-01 17:56:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:16,200 INFO L470 AbstractCegarLoop]: Abstraction has 6522 states and 29040 transitions. [2022-03-01 17:56:16,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6522 states and 29040 transitions. [2022-03-01 17:56:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:16,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:16,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:16,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-01 17:56:16,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-01 17:56:16,427 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2007075688, now seen corresponding path program 6 times [2022-03-01 17:56:16,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:16,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667285081] [2022-03-01 17:56:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:16,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667285081] [2022-03-01 17:56:16,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667285081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:16,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966222312] [2022-03-01 17:56:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:16,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:16,581 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:16,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-01 17:56:16,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:56:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:16,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2022-03-01 17:56:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:17,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:56:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966222312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:17,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:17,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:56:17,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654959377] [2022-03-01 17:56:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:56:17,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:56:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:56:17,272 INFO L87 Difference]: Start difference. First operand 6522 states and 29040 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:20,208 INFO L93 Difference]: Finished difference Result 8883 states and 38035 transitions. [2022-03-01 17:56:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:56:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:20,231 INFO L225 Difference]: With dead ends: 8883 [2022-03-01 17:56:20,231 INFO L226 Difference]: Without dead ends: 8705 [2022-03-01 17:56:20,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=591, Invalid=4811, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 17:56:20,231 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 498 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 3053 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1370 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:20,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 243 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3053 Invalid, 0 Unknown, 1370 Unchecked, 1.1s Time] [2022-03-01 17:56:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8705 states. [2022-03-01 17:56:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8705 to 6540. [2022-03-01 17:56:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 4.452974460926748) internal successors, (29118), 6539 states have internal predecessors, (29118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 29118 transitions. [2022-03-01 17:56:20,365 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 29118 transitions. Word has length 30 [2022-03-01 17:56:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:20,365 INFO L470 AbstractCegarLoop]: Abstraction has 6540 states and 29118 transitions. [2022-03-01 17:56:20,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 29118 transitions. [2022-03-01 17:56:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:20,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:20,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:20,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:20,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-01 17:56:20,595 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 707290770, now seen corresponding path program 7 times [2022-03-01 17:56:20,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:20,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640093341] [2022-03-01 17:56:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:20,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:20,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640093341] [2022-03-01 17:56:20,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640093341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:20,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695120407] [2022-03-01 17:56:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:20,806 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:20,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-01 17:56:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:21,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:21,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:21,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:56:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:21,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:21,460 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:21,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:21,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:21,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:21,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695120407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:21,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:21,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:21,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31484223] [2022-03-01 17:56:21,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:21,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:21,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:21,549 INFO L87 Difference]: Start difference. First operand 6540 states and 29118 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:22,630 INFO L93 Difference]: Finished difference Result 6944 states and 30684 transitions. [2022-03-01 17:56:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:56:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:22,648 INFO L225 Difference]: With dead ends: 6944 [2022-03-01 17:56:22,648 INFO L226 Difference]: Without dead ends: 6871 [2022-03-01 17:56:22,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:56:22,648 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:22,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 129 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1889 Invalid, 0 Unknown, 253 Unchecked, 0.7s Time] [2022-03-01 17:56:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2022-03-01 17:56:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6546. [2022-03-01 17:56:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6546 states, 6545 states have (on average 4.453170359052712) internal successors, (29146), 6545 states have internal predecessors, (29146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6546 states to 6546 states and 29146 transitions. [2022-03-01 17:56:22,767 INFO L78 Accepts]: Start accepts. Automaton has 6546 states and 29146 transitions. Word has length 30 [2022-03-01 17:56:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:22,767 INFO L470 AbstractCegarLoop]: Abstraction has 6546 states and 29146 transitions. [2022-03-01 17:56:22,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6546 states and 29146 transitions. [2022-03-01 17:56:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:22,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:22,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:22,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-01 17:56:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-01 17:56:22,995 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1115619218, now seen corresponding path program 8 times [2022-03-01 17:56:22,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:22,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930914715] [2022-03-01 17:56:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:22,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:23,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930914715] [2022-03-01 17:56:23,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930914715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:23,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319887399] [2022-03-01 17:56:23,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:23,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:23,246 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:23,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-01 17:56:23,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:23,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:23,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 17:56:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:24,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:24,051 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:56:24,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:56:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:24,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319887399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:24,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:24,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-03-01 17:56:24,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050287009] [2022-03-01 17:56:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:24,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:24,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:24,147 INFO L87 Difference]: Start difference. First operand 6546 states and 29146 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:24,752 INFO L93 Difference]: Finished difference Result 6853 states and 30307 transitions. [2022-03-01 17:56:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:56:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:24,770 INFO L225 Difference]: With dead ends: 6853 [2022-03-01 17:56:24,771 INFO L226 Difference]: Without dead ends: 6796 [2022-03-01 17:56:24,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:56:24,771 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:24,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 138 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1424 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2022-03-01 17:56:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2022-03-01 17:56:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 6550. [2022-03-01 17:56:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6550 states, 6549 states have (on average 4.45258818140174) internal successors, (29160), 6549 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 29160 transitions. [2022-03-01 17:56:24,940 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 29160 transitions. Word has length 30 [2022-03-01 17:56:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:24,940 INFO L470 AbstractCegarLoop]: Abstraction has 6550 states and 29160 transitions. [2022-03-01 17:56:24,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 29160 transitions. [2022-03-01 17:56:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:24,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:24,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:24,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-03-01 17:56:25,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-01 17:56:25,167 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1773444078, now seen corresponding path program 9 times [2022-03-01 17:56:25,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:25,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000898516] [2022-03-01 17:56:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:25,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:25,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000898516] [2022-03-01 17:56:25,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000898516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:25,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062833475] [2022-03-01 17:56:25,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:25,359 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:25,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-01 17:56:25,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:56:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:25,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:25,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:25,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 17:56:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:25,934 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:56:25,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:56:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:26,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062833475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:26,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:26,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:56:26,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122773390] [2022-03-01 17:56:26,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:26,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:26,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:26,037 INFO L87 Difference]: Start difference. First operand 6550 states and 29160 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:26,749 INFO L93 Difference]: Finished difference Result 7016 states and 30966 transitions. [2022-03-01 17:56:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:56:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:26,768 INFO L225 Difference]: With dead ends: 7016 [2022-03-01 17:56:26,768 INFO L226 Difference]: Without dead ends: 7009 [2022-03-01 17:56:26,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:56:26,768 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:26,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 146 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1625 Invalid, 0 Unknown, 495 Unchecked, 0.5s Time] [2022-03-01 17:56:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2022-03-01 17:56:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6637. [2022-03-01 17:56:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 6636 states have (on average 4.4451476793248945) internal successors, (29498), 6636 states have internal predecessors, (29498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 29498 transitions. [2022-03-01 17:56:26,891 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 29498 transitions. Word has length 30 [2022-03-01 17:56:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:26,891 INFO L470 AbstractCegarLoop]: Abstraction has 6637 states and 29498 transitions. [2022-03-01 17:56:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 29498 transitions. [2022-03-01 17:56:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:26,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:26,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:26,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:27,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,119 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1744814927, now seen corresponding path program 1 times [2022-03-01 17:56:27,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:27,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690239700] [2022-03-01 17:56:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:27,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:27,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690239700] [2022-03-01 17:56:27,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690239700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:27,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864512177] [2022-03-01 17:56:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:27,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:27,300 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:27,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-01 17:56:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:27,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:27,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:27,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:56:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:27,957 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:27,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:28,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:28,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:28,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:28,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864512177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:28,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:28,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:56:28,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867904757] [2022-03-01 17:56:28,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:28,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:28,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:28,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:28,048 INFO L87 Difference]: Start difference. First operand 6637 states and 29498 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:28,972 INFO L93 Difference]: Finished difference Result 7275 states and 31943 transitions. [2022-03-01 17:56:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:56:28,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:28,990 INFO L225 Difference]: With dead ends: 7275 [2022-03-01 17:56:28,991 INFO L226 Difference]: Without dead ends: 7166 [2022-03-01 17:56:28,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:56:28,991 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:28,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 155 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2062 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2022-03-01 17:56:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7166 states. [2022-03-01 17:56:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7166 to 6623. [2022-03-01 17:56:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6622 states have (on average 4.445484747810329) internal successors, (29438), 6622 states have internal predecessors, (29438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 29438 transitions. [2022-03-01 17:56:29,113 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 29438 transitions. Word has length 30 [2022-03-01 17:56:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:29,113 INFO L470 AbstractCegarLoop]: Abstraction has 6623 states and 29438 transitions. [2022-03-01 17:56:29,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 29438 transitions. [2022-03-01 17:56:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:29,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:29,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:29,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-01 17:56:29,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-03-01 17:56:29,341 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1885056364, now seen corresponding path program 10 times [2022-03-01 17:56:29,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:29,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439999854] [2022-03-01 17:56:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:29,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439999854] [2022-03-01 17:56:29,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439999854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:29,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388119615] [2022-03-01 17:56:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:29,573 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:29,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-01 17:56:29,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:29,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:29,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:56:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:30,202 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:30,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388119615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:30,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:30,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:56:30,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118405787] [2022-03-01 17:56:30,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:30,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:30,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:30,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:30,280 INFO L87 Difference]: Start difference. First operand 6623 states and 29438 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:31,234 INFO L93 Difference]: Finished difference Result 7133 states and 31431 transitions. [2022-03-01 17:56:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:56:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:31,252 INFO L225 Difference]: With dead ends: 7133 [2022-03-01 17:56:31,252 INFO L226 Difference]: Without dead ends: 7069 [2022-03-01 17:56:31,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:31,252 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 189 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:31,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 148 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1889 Invalid, 0 Unknown, 405 Unchecked, 0.6s Time] [2022-03-01 17:56:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2022-03-01 17:56:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6621. [2022-03-01 17:56:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 4.445619335347432) internal successors, (29430), 6620 states have internal predecessors, (29430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 29430 transitions. [2022-03-01 17:56:31,372 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 29430 transitions. Word has length 30 [2022-03-01 17:56:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:31,372 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 29430 transitions. [2022-03-01 17:56:31,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 29430 transitions. [2022-03-01 17:56:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:31,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:31,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:31,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-01 17:56:31,601 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1526599829, now seen corresponding path program 4 times [2022-03-01 17:56:31,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:31,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975498500] [2022-03-01 17:56:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:31,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:31,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975498500] [2022-03-01 17:56:31,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975498500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:31,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063328884] [2022-03-01 17:56:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:31,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:31,757 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-01 17:56:31,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:31,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:31,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:31,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:31,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:56:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:32,202 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:32,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:32,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063328884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:32,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:32,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:56:32,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387303673] [2022-03-01 17:56:32,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:32,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:32,256 INFO L87 Difference]: Start difference. First operand 6621 states and 29430 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:32,978 INFO L93 Difference]: Finished difference Result 7087 states and 31261 transitions. [2022-03-01 17:56:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:56:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:32,996 INFO L225 Difference]: With dead ends: 7087 [2022-03-01 17:56:32,996 INFO L226 Difference]: Without dead ends: 7030 [2022-03-01 17:56:32,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:56:32,997 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:32,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 108 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1228 Invalid, 0 Unknown, 286 Unchecked, 0.4s Time] [2022-03-01 17:56:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2022-03-01 17:56:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6627. [2022-03-01 17:56:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6626 states have (on average 4.445819498943556) internal successors, (29458), 6626 states have internal predecessors, (29458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 29458 transitions. [2022-03-01 17:56:33,152 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 29458 transitions. Word has length 30 [2022-03-01 17:56:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:33,152 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 29458 transitions. [2022-03-01 17:56:33,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 29458 transitions. [2022-03-01 17:56:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:33,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:33,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:33,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:33,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:33,381 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1308248243, now seen corresponding path program 5 times [2022-03-01 17:56:33,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:33,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874550820] [2022-03-01 17:56:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:33,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:33,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874550820] [2022-03-01 17:56:33,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874550820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:33,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349506679] [2022-03-01 17:56:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:33,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:33,533 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:33,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-01 17:56:33,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:33,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:33,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 17:56:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:33,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 52 [2022-03-01 17:56:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:34,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:34,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:34,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:34,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 17:56:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:34,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349506679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:34,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:34,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 17:56:34,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101525606] [2022-03-01 17:56:34,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:34,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:56:34,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:56:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:34,623 INFO L87 Difference]: Start difference. First operand 6627 states and 29458 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:38,270 INFO L93 Difference]: Finished difference Result 8074 states and 34997 transitions. [2022-03-01 17:56:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 17:56:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:38,290 INFO L225 Difference]: With dead ends: 8074 [2022-03-01 17:56:38,290 INFO L226 Difference]: Without dead ends: 7929 [2022-03-01 17:56:38,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=720, Invalid=7112, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 17:56:38,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 622 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 3600 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 6268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2457 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:38,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 391 Invalid, 6268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3600 Invalid, 0 Unknown, 2457 Unchecked, 1.6s Time] [2022-03-01 17:56:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7929 states. [2022-03-01 17:56:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7929 to 6650. [2022-03-01 17:56:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6650 states, 6649 states have (on average 4.449240487291322) internal successors, (29583), 6649 states have internal predecessors, (29583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6650 states to 6650 states and 29583 transitions. [2022-03-01 17:56:38,422 INFO L78 Accepts]: Start accepts. Automaton has 6650 states and 29583 transitions. Word has length 30 [2022-03-01 17:56:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:38,422 INFO L470 AbstractCegarLoop]: Abstraction has 6650 states and 29583 transitions. [2022-03-01 17:56:38,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6650 states and 29583 transitions. [2022-03-01 17:56:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:38,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:38,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:38,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:38,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,647 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash -49840526, now seen corresponding path program 11 times [2022-03-01 17:56:38,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:38,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473634986] [2022-03-01 17:56:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:38,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:38,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473634986] [2022-03-01 17:56:38,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473634986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:38,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609738376] [2022-03-01 17:56:38,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:38,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:38,869 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-01 17:56:38,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:38,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:56:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:39,388 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:39,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:39,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:39,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:39,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609738376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:39,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:39,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:56:39,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829368462] [2022-03-01 17:56:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:39,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:39,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:39,450 INFO L87 Difference]: Start difference. First operand 6650 states and 29583 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:40,564 INFO L93 Difference]: Finished difference Result 7400 states and 32601 transitions. [2022-03-01 17:56:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:56:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:40,583 INFO L225 Difference]: With dead ends: 7400 [2022-03-01 17:56:40,583 INFO L226 Difference]: Without dead ends: 7336 [2022-03-01 17:56:40,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:56:40,583 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:40,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 184 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2256 Invalid, 0 Unknown, 597 Unchecked, 0.7s Time] [2022-03-01 17:56:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-03-01 17:56:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 6670. [2022-03-01 17:56:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6670 states, 6669 states have (on average 4.448642974958765) internal successors, (29668), 6669 states have internal predecessors, (29668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 29668 transitions. [2022-03-01 17:56:40,704 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 29668 transitions. Word has length 30 [2022-03-01 17:56:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:40,704 INFO L470 AbstractCegarLoop]: Abstraction has 6670 states and 29668 transitions. [2022-03-01 17:56:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 29668 transitions. [2022-03-01 17:56:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:40,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:40,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:40,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:40,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:40,932 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash -47065870, now seen corresponding path program 12 times [2022-03-01 17:56:40,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:40,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82408433] [2022-03-01 17:56:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:40,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:41,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82408433] [2022-03-01 17:56:41,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82408433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:41,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281583990] [2022-03-01 17:56:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:41,095 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:41,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-01 17:56:41,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:56:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:56:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:41,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2022-03-01 17:56:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2022-03-01 17:56:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281583990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:41,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:41,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:56:41,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014432149] [2022-03-01 17:56:41,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:41,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:41,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:41,937 INFO L87 Difference]: Start difference. First operand 6670 states and 29668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:43,838 INFO L93 Difference]: Finished difference Result 9582 states and 40553 transitions. [2022-03-01 17:56:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:56:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:43,862 INFO L225 Difference]: With dead ends: 9582 [2022-03-01 17:56:43,862 INFO L226 Difference]: Without dead ends: 9517 [2022-03-01 17:56:43,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=556, Invalid=3866, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:56:43,863 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 501 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1547 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:43,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 246 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1555 Invalid, 0 Unknown, 1547 Unchecked, 0.6s Time] [2022-03-01 17:56:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2022-03-01 17:56:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 6672. [2022-03-01 17:56:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6672 states, 6671 states have (on average 4.448208664368161) internal successors, (29674), 6671 states have internal predecessors, (29674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6672 states to 6672 states and 29674 transitions. [2022-03-01 17:56:44,005 INFO L78 Accepts]: Start accepts. Automaton has 6672 states and 29674 transitions. Word has length 30 [2022-03-01 17:56:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 6672 states and 29674 transitions. [2022-03-01 17:56:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6672 states and 29674 transitions. [2022-03-01 17:56:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:44,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:44,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:44,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:44,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:44,234 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -553412136, now seen corresponding path program 13 times [2022-03-01 17:56:44,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:44,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012718406] [2022-03-01 17:56:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:44,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:44,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012718406] [2022-03-01 17:56:44,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012718406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:44,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212183334] [2022-03-01 17:56:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:44,412 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:44,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-01 17:56:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:44,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:44,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:44,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:44,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:56:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:44,861 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:44,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:44,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:44,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212183334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:44,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:44,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:56:44,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769122310] [2022-03-01 17:56:44,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:44,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:44,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:44,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:44,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:44,915 INFO L87 Difference]: Start difference. First operand 6672 states and 29674 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:45,564 INFO L93 Difference]: Finished difference Result 7206 states and 31772 transitions. [2022-03-01 17:56:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:56:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:45,583 INFO L225 Difference]: With dead ends: 7206 [2022-03-01 17:56:45,583 INFO L226 Difference]: Without dead ends: 7147 [2022-03-01 17:56:45,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:56:45,584 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:45,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 146 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1464 Invalid, 0 Unknown, 374 Unchecked, 0.4s Time] [2022-03-01 17:56:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2022-03-01 17:56:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6695. [2022-03-01 17:56:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 4.4462204959665375) internal successors, (29763), 6694 states have internal predecessors, (29763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 29763 transitions. [2022-03-01 17:56:45,741 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 29763 transitions. Word has length 30 [2022-03-01 17:56:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:45,741 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 29763 transitions. [2022-03-01 17:56:45,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 29763 transitions. [2022-03-01 17:56:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:45,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:45,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:45,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-01 17:56:45,970 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 700507388, now seen corresponding path program 14 times [2022-03-01 17:56:45,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:45,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997582009] [2022-03-01 17:56:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:45,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:46,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997582009] [2022-03-01 17:56:46,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997582009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:46,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128637189] [2022-03-01 17:56:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:46,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:46,110 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:46,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-01 17:56:46,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:46,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:46,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:56:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:46,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-03-01 17:56:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:46,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2022-03-01 17:56:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128637189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:46,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:46,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-03-01 17:56:46,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360213051] [2022-03-01 17:56:46,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:46,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:46,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:46,926 INFO L87 Difference]: Start difference. First operand 6695 states and 29763 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:48,526 INFO L93 Difference]: Finished difference Result 9226 states and 39321 transitions. [2022-03-01 17:56:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:56:48,526 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:48,593 INFO L225 Difference]: With dead ends: 9226 [2022-03-01 17:56:48,593 INFO L226 Difference]: Without dead ends: 9219 [2022-03-01 17:56:48,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=428, Invalid=3354, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:56:48,593 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 459 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2192 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:48,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 288 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2225 Invalid, 0 Unknown, 2192 Unchecked, 0.7s Time] [2022-03-01 17:56:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2022-03-01 17:56:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 6763. [2022-03-01 17:56:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 4.440402247855664) internal successors, (30026), 6762 states have internal predecessors, (30026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 30026 transitions. [2022-03-01 17:56:48,723 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 30026 transitions. Word has length 30 [2022-03-01 17:56:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:48,723 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 30026 transitions. [2022-03-01 17:56:48,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 30026 transitions. [2022-03-01 17:56:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:48,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:48,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:48,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:48,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-01 17:56:48,940 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 729136539, now seen corresponding path program 2 times [2022-03-01 17:56:48,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:48,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429314306] [2022-03-01 17:56:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:49,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:49,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429314306] [2022-03-01 17:56:49,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429314306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:49,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404392264] [2022-03-01 17:56:49,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:49,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:49,144 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:49,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-01 17:56:49,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:49,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:56:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:49,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:49,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-03-01 17:56:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:49,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:50,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2022-03-01 17:56:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404392264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:50,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:50,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-03-01 17:56:50,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060281352] [2022-03-01 17:56:50,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:50,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:50,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:50,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:50,142 INFO L87 Difference]: Start difference. First operand 6763 states and 30026 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:52,148 INFO L93 Difference]: Finished difference Result 9940 states and 41778 transitions. [2022-03-01 17:56:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:56:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:52,174 INFO L225 Difference]: With dead ends: 9940 [2022-03-01 17:56:52,174 INFO L226 Difference]: Without dead ends: 9863 [2022-03-01 17:56:52,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=3832, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:56:52,174 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 389 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1552 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:52,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 341 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2218 Invalid, 0 Unknown, 1552 Unchecked, 0.8s Time] [2022-03-01 17:56:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9863 states. [2022-03-01 17:56:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9863 to 6837. [2022-03-01 17:56:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6837 states, 6836 states have (on average 4.434318314803979) internal successors, (30313), 6836 states have internal predecessors, (30313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 30313 transitions. [2022-03-01 17:56:52,331 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 30313 transitions. Word has length 30 [2022-03-01 17:56:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:52,331 INFO L470 AbstractCegarLoop]: Abstraction has 6837 states and 30313 transitions. [2022-03-01 17:56:52,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 30313 transitions. [2022-03-01 17:56:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:52,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:52,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:52,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-01 17:56:52,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-01 17:56:52,559 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1418839188, now seen corresponding path program 15 times [2022-03-01 17:56:52,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:52,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543052460] [2022-03-01 17:56:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:52,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543052460] [2022-03-01 17:56:52,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543052460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:52,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693260909] [2022-03-01 17:56:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:52,782 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:52,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-01 17:56:52,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:56:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:53,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:56:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:53,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:56:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:53,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693260909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:53,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:53,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:56:53,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95516770] [2022-03-01 17:56:53,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:53,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:53,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:53,926 INFO L87 Difference]: Start difference. First operand 6837 states and 30313 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:56,076 INFO L93 Difference]: Finished difference Result 9210 states and 39202 transitions. [2022-03-01 17:56:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:56:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:56,106 INFO L225 Difference]: With dead ends: 9210 [2022-03-01 17:56:56,106 INFO L226 Difference]: Without dead ends: 9047 [2022-03-01 17:56:56,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=477, Invalid=3683, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:56:56,107 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 461 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:56,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 283 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2215 Invalid, 0 Unknown, 963 Unchecked, 0.9s Time] [2022-03-01 17:56:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2022-03-01 17:56:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 6836. [2022-03-01 17:56:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 4.437454279444038) internal successors, (30330), 6835 states have internal predecessors, (30330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 30330 transitions. [2022-03-01 17:56:56,254 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 30330 transitions. Word has length 30 [2022-03-01 17:56:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:56,254 INFO L470 AbstractCegarLoop]: Abstraction has 6836 states and 30330 transitions. [2022-03-01 17:56:56,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 30330 transitions. [2022-03-01 17:56:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:56,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:56,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:56,482 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1548292298, now seen corresponding path program 16 times [2022-03-01 17:56:56,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:56,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796409167] [2022-03-01 17:56:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:56,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796409167] [2022-03-01 17:56:56,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796409167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:56,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296542849] [2022-03-01 17:56:56,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:56,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:56,635 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:56,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-01 17:56:56,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:56,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:56,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:56,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:56:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:57,139 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:57,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:56:57,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:57,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:57,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:56:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:57,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296542849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:57,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:57,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-01 17:56:57,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098994860] [2022-03-01 17:56:57,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:57,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:56:57,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:57,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:56:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:56:57,238 INFO L87 Difference]: Start difference. First operand 6836 states and 30330 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:59,438 INFO L93 Difference]: Finished difference Result 8188 states and 35836 transitions. [2022-03-01 17:56:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:56:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:56:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:59,460 INFO L225 Difference]: With dead ends: 8188 [2022-03-01 17:56:59,460 INFO L226 Difference]: Without dead ends: 8115 [2022-03-01 17:56:59,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=438, Invalid=2984, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:56:59,461 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 354 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:59,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 141 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:56:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2022-03-01 17:56:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 6854. [2022-03-01 17:56:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6854 states, 6853 states have (on average 4.437764482708303) internal successors, (30412), 6853 states have internal predecessors, (30412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6854 states to 6854 states and 30412 transitions. [2022-03-01 17:56:59,597 INFO L78 Accepts]: Start accepts. Automaton has 6854 states and 30412 transitions. Word has length 30 [2022-03-01 17:56:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:59,597 INFO L470 AbstractCegarLoop]: Abstraction has 6854 states and 30412 transitions. [2022-03-01 17:56:59,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6854 states and 30412 transitions. [2022-03-01 17:56:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:56:59,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:59,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:59,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:59,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-03-01 17:56:59,825 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash -839631548, now seen corresponding path program 17 times [2022-03-01 17:56:59,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:59,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974313038] [2022-03-01 17:56:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:59,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:59,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974313038] [2022-03-01 17:56:59,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974313038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:59,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105382420] [2022-03-01 17:56:59,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:59,984 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:59,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-01 17:57:00,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:00,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:00,447 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:00,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:57:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:00,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:57:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:00,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105382420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:00,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:00,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:57:00,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125556712] [2022-03-01 17:57:00,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:00,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:00,531 INFO L87 Difference]: Start difference. First operand 6854 states and 30412 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:02,554 INFO L93 Difference]: Finished difference Result 8038 states and 35238 transitions. [2022-03-01 17:57:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:57:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:02,575 INFO L225 Difference]: With dead ends: 8038 [2022-03-01 17:57:02,575 INFO L226 Difference]: Without dead ends: 7963 [2022-03-01 17:57:02,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=2503, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:57:02,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 289 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:02,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 148 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3190 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:57:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2022-03-01 17:57:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 6849. [2022-03-01 17:57:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6848 states have (on average 4.4375) internal successors, (30388), 6848 states have internal predecessors, (30388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 30388 transitions. [2022-03-01 17:57:02,708 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 30388 transitions. Word has length 30 [2022-03-01 17:57:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:02,708 INFO L470 AbstractCegarLoop]: Abstraction has 6849 states and 30388 transitions. [2022-03-01 17:57:02,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 30388 transitions. [2022-03-01 17:57:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:02,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:02,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:02,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-01 17:57:02,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:02,928 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 49864555, now seen corresponding path program 1 times [2022-03-01 17:57:02,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:02,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963176929] [2022-03-01 17:57:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:02,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:03,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963176929] [2022-03-01 17:57:03,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963176929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:03,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214433952] [2022-03-01 17:57:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:03,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:03,063 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:03,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-01 17:57:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:03,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:57:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:03,428 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:03,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:57:03,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:03,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:03,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:57:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214433952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:03,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:03,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-01 17:57:03,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636608589] [2022-03-01 17:57:03,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:03,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:03,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:03,499 INFO L87 Difference]: Start difference. First operand 6849 states and 30388 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:06,027 INFO L93 Difference]: Finished difference Result 9316 states and 40032 transitions. [2022-03-01 17:57:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:57:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:06,058 INFO L225 Difference]: With dead ends: 9316 [2022-03-01 17:57:06,058 INFO L226 Difference]: Without dead ends: 9153 [2022-03-01 17:57:06,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=544, Invalid=3878, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:57:06,058 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 541 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 3999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:06,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 254 Invalid, 3999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3765 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 17:57:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2022-03-01 17:57:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 6912. [2022-03-01 17:57:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 6911 states have (on average 4.441470120098394) internal successors, (30695), 6911 states have internal predecessors, (30695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 30695 transitions. [2022-03-01 17:57:06,251 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 30695 transitions. Word has length 30 [2022-03-01 17:57:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:06,251 INFO L470 AbstractCegarLoop]: Abstraction has 6912 states and 30695 transitions. [2022-03-01 17:57:06,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 30695 transitions. [2022-03-01 17:57:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:06,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:06,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:06,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-01 17:57:06,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,491 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash 458193003, now seen corresponding path program 2 times [2022-03-01 17:57:06,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:06,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993875956] [2022-03-01 17:57:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:06,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:06,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993875956] [2022-03-01 17:57:06,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993875956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:06,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526316811] [2022-03-01 17:57:06,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:06,640 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:06,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-01 17:57:06,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:06,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:06,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:06,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:06,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:06,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:06,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:07,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:07,101 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:57:07,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:57:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:07,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526316811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:07,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:07,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:57:07,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293580202] [2022-03-01 17:57:07,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:07,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:07,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:07,213 INFO L87 Difference]: Start difference. First operand 6912 states and 30695 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:08,764 INFO L93 Difference]: Finished difference Result 8588 states and 37518 transitions. [2022-03-01 17:57:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:57:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:08,789 INFO L225 Difference]: With dead ends: 8588 [2022-03-01 17:57:08,789 INFO L226 Difference]: Without dead ends: 8527 [2022-03-01 17:57:08,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:57:08,789 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 272 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 710 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:08,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 153 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2381 Invalid, 0 Unknown, 710 Unchecked, 0.8s Time] [2022-03-01 17:57:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-03-01 17:57:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 7015. [2022-03-01 17:57:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7015 states, 7014 states have (on average 4.439549472483605) internal successors, (31139), 7014 states have internal predecessors, (31139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7015 states to 7015 states and 31139 transitions. [2022-03-01 17:57:08,944 INFO L78 Accepts]: Start accepts. Automaton has 7015 states and 31139 transitions. Word has length 30 [2022-03-01 17:57:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:08,944 INFO L470 AbstractCegarLoop]: Abstraction has 7015 states and 31139 transitions. [2022-03-01 17:57:08,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7015 states and 31139 transitions. [2022-03-01 17:57:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:08,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:08,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:08,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-01 17:57:09,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:09,175 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1201188978, now seen corresponding path program 18 times [2022-03-01 17:57:09,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:09,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24908342] [2022-03-01 17:57:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:09,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:09,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24908342] [2022-03-01 17:57:09,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24908342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:09,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998977134] [2022-03-01 17:57:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:09,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:09,305 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-01 17:57:09,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:57:09,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:57:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:09,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-03-01 17:57:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:10,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:10,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:10,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:57:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:10,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998977134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:10,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:10,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-01 17:57:10,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116787513] [2022-03-01 17:57:10,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:10,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:10,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:10,152 INFO L87 Difference]: Start difference. First operand 7015 states and 31139 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:13,448 INFO L93 Difference]: Finished difference Result 9654 states and 41269 transitions. [2022-03-01 17:57:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:57:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:13,473 INFO L225 Difference]: With dead ends: 9654 [2022-03-01 17:57:13,473 INFO L226 Difference]: Without dead ends: 9580 [2022-03-01 17:57:13,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=800, Invalid=5206, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:57:13,473 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 470 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 5515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2491 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 296 Invalid, 5515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2818 Invalid, 0 Unknown, 2491 Unchecked, 1.2s Time] [2022-03-01 17:57:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2022-03-01 17:57:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 7047. [2022-03-01 17:57:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 4.436417825716719) internal successors, (31259), 7046 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 31259 transitions. [2022-03-01 17:57:13,634 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 31259 transitions. Word has length 30 [2022-03-01 17:57:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:13,634 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 31259 transitions. [2022-03-01 17:57:13,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 31259 transitions. [2022-03-01 17:57:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:13,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:13,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:13,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:13,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:13,864 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1517337963, now seen corresponding path program 3 times [2022-03-01 17:57:13,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:13,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644949548] [2022-03-01 17:57:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:14,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644949548] [2022-03-01 17:57:14,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644949548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:14,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859067912] [2022-03-01 17:57:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:14,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:14,025 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:14,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-01 17:57:14,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:14,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:14,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:57:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:14,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:14,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:14,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:14,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:57:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859067912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:14,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:14,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 17:57:14,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56459813] [2022-03-01 17:57:14,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:57:14,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:57:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:57:14,701 INFO L87 Difference]: Start difference. First operand 7047 states and 31259 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:19,630 INFO L93 Difference]: Finished difference Result 13701 states and 57319 transitions. [2022-03-01 17:57:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-01 17:57:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:19,668 INFO L225 Difference]: With dead ends: 13701 [2022-03-01 17:57:19,668 INFO L226 Difference]: Without dead ends: 13517 [2022-03-01 17:57:19,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 50 SyntacticMatches, 12 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5191 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2162, Invalid=12358, Unknown=0, NotChecked=0, Total=14520 [2022-03-01 17:57:19,669 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 927 mSDsluCounter, 3758 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 8128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5100 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:19,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 424 Invalid, 8128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2646 Invalid, 0 Unknown, 5100 Unchecked, 1.2s Time] [2022-03-01 17:57:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13517 states. [2022-03-01 17:57:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13517 to 7661. [2022-03-01 17:57:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7661 states, 7660 states have (on average 4.45953002610966) internal successors, (34160), 7660 states have internal predecessors, (34160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7661 states to 7661 states and 34160 transitions. [2022-03-01 17:57:19,867 INFO L78 Accepts]: Start accepts. Automaton has 7661 states and 34160 transitions. Word has length 30 [2022-03-01 17:57:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 7661 states and 34160 transitions. [2022-03-01 17:57:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7661 states and 34160 transitions. [2022-03-01 17:57:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:19,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:19,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:19,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:20,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:20,097 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -469793688, now seen corresponding path program 19 times [2022-03-01 17:57:20,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:20,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835775648] [2022-03-01 17:57:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:20,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:20,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835775648] [2022-03-01 17:57:20,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835775648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:20,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718517203] [2022-03-01 17:57:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:20,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:20,291 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:20,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-01 17:57:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:20,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:20,774 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:20,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:57:20,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:20,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:20,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:57:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718517203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:20,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:20,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-01 17:57:20,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130953144] [2022-03-01 17:57:20,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:20,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:20,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:20,874 INFO L87 Difference]: Start difference. First operand 7661 states and 34160 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:22,956 INFO L93 Difference]: Finished difference Result 8948 states and 39411 transitions. [2022-03-01 17:57:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:57:22,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:22,983 INFO L225 Difference]: With dead ends: 8948 [2022-03-01 17:57:22,984 INFO L226 Difference]: Without dead ends: 8875 [2022-03-01 17:57:22,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=293, Invalid=1869, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:57:22,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 298 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:22,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 158 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3013 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:57:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2022-03-01 17:57:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 7699. [2022-03-01 17:57:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7698 states have (on average 4.459859703819173) internal successors, (34332), 7698 states have internal predecessors, (34332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 34332 transitions. [2022-03-01 17:57:23,154 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 34332 transitions. Word has length 30 [2022-03-01 17:57:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:23,154 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 34332 transitions. [2022-03-01 17:57:23,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 34332 transitions. [2022-03-01 17:57:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:23,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:23,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:23,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:23,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:23,384 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1437249762, now seen corresponding path program 20 times [2022-03-01 17:57:23,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:23,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477920623] [2022-03-01 17:57:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:23,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477920623] [2022-03-01 17:57:23,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477920623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:23,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224088169] [2022-03-01 17:57:23,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:23,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:23,549 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:23,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-01 17:57:23,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:23,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:23,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:24,147 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:57:24,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:57:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:24,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224088169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:24,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:24,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:57:24,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122802652] [2022-03-01 17:57:24,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:24,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:24,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:24,284 INFO L87 Difference]: Start difference. First operand 7699 states and 34332 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:26,191 INFO L93 Difference]: Finished difference Result 8935 states and 39369 transitions. [2022-03-01 17:57:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:57:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:26,215 INFO L225 Difference]: With dead ends: 8935 [2022-03-01 17:57:26,215 INFO L226 Difference]: Without dead ends: 8860 [2022-03-01 17:57:26,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:57:26,216 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 275 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:26,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 153 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2433 Invalid, 0 Unknown, 743 Unchecked, 1.0s Time] [2022-03-01 17:57:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8860 states. [2022-03-01 17:57:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8860 to 7694. [2022-03-01 17:57:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 4.459378655920967) internal successors, (34306), 7693 states have internal predecessors, (34306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 34306 transitions. [2022-03-01 17:57:26,362 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 34306 transitions. Word has length 30 [2022-03-01 17:57:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:26,362 INFO L470 AbstractCegarLoop]: Abstraction has 7694 states and 34306 transitions. [2022-03-01 17:57:26,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 34306 transitions. [2022-03-01 17:57:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:26,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:26,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:26,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:26,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-01 17:57:26,591 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1274570318, now seen corresponding path program 21 times [2022-03-01 17:57:26,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:26,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020779252] [2022-03-01 17:57:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:26,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:26,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020779252] [2022-03-01 17:57:26,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020779252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:26,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294675622] [2022-03-01 17:57:26,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:26,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:26,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:26,750 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:26,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-01 17:57:26,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:26,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:26,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:26,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-03-01 17:57:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:27,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:27,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:57:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294675622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:27,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:27,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:57:27,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676064964] [2022-03-01 17:57:27,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:27,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:27,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:27,615 INFO L87 Difference]: Start difference. First operand 7694 states and 34306 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:30,711 INFO L93 Difference]: Finished difference Result 10292 states and 44805 transitions. [2022-03-01 17:57:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:57:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:30,739 INFO L225 Difference]: With dead ends: 10292 [2022-03-01 17:57:30,739 INFO L226 Difference]: Without dead ends: 10203 [2022-03-01 17:57:30,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=669, Invalid=3753, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:57:30,740 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 478 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1360 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:30,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 181 Invalid, 3711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2138 Invalid, 0 Unknown, 1360 Unchecked, 1.0s Time] [2022-03-01 17:57:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2022-03-01 17:57:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 7798. [2022-03-01 17:57:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7798 states, 7797 states have (on average 4.464152879312556) internal successors, (34807), 7797 states have internal predecessors, (34807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 34807 transitions. [2022-03-01 17:57:30,907 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 34807 transitions. Word has length 30 [2022-03-01 17:57:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:30,907 INFO L470 AbstractCegarLoop]: Abstraction has 7798 states and 34807 transitions. [2022-03-01 17:57:30,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 34807 transitions. [2022-03-01 17:57:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:30,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:30,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:30,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-01 17:57:31,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-01 17:57:31,127 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:31,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1342785842, now seen corresponding path program 22 times [2022-03-01 17:57:31,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:31,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602618814] [2022-03-01 17:57:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:31,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602618814] [2022-03-01 17:57:31,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602618814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:31,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571180151] [2022-03-01 17:57:31,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:31,307 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-01 17:57:31,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:31,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:31,712 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:31,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:57:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571180151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:31,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:31,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:57:31,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242113379] [2022-03-01 17:57:31,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:31,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:31,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:31,828 INFO L87 Difference]: Start difference. First operand 7798 states and 34807 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:33,726 INFO L93 Difference]: Finished difference Result 9044 states and 39809 transitions. [2022-03-01 17:57:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:57:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:33,752 INFO L225 Difference]: With dead ends: 9044 [2022-03-01 17:57:33,752 INFO L226 Difference]: Without dead ends: 8985 [2022-03-01 17:57:33,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:57:33,752 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 318 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:33,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 158 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2790 Invalid, 0 Unknown, 196 Unchecked, 1.0s Time] [2022-03-01 17:57:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2022-03-01 17:57:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7798. [2022-03-01 17:57:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7798 states, 7797 states have (on average 4.464152879312556) internal successors, (34807), 7797 states have internal predecessors, (34807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 34807 transitions. [2022-03-01 17:57:33,918 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 34807 transitions. Word has length 30 [2022-03-01 17:57:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:33,918 INFO L470 AbstractCegarLoop]: Abstraction has 7798 states and 34807 transitions. [2022-03-01 17:57:33,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 34807 transitions. [2022-03-01 17:57:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:33,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:33,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:33,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:34,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-01 17:57:34,149 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1682898766, now seen corresponding path program 23 times [2022-03-01 17:57:34,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:34,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9038287] [2022-03-01 17:57:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:34,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:34,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:34,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9038287] [2022-03-01 17:57:34,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9038287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:34,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510191436] [2022-03-01 17:57:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:34,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:34,264 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:34,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-01 17:57:34,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:57:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:57:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:34,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:34,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2022-03-01 17:57:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:35,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:35,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:35,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:35,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 9 [2022-03-01 17:57:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:35,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510191436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:35,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:35,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-03-01 17:57:35,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989743474] [2022-03-01 17:57:35,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:35,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:57:35,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:57:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:57:35,576 INFO L87 Difference]: Start difference. First operand 7798 states and 34807 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:38,742 INFO L93 Difference]: Finished difference Result 10313 states and 44174 transitions. [2022-03-01 17:57:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:57:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:38,769 INFO L225 Difference]: With dead ends: 10313 [2022-03-01 17:57:38,769 INFO L226 Difference]: Without dead ends: 10209 [2022-03-01 17:57:38,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=594, Invalid=4236, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:57:38,770 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 460 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 957 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:38,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 225 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2522 Invalid, 0 Unknown, 957 Unchecked, 1.2s Time] [2022-03-01 17:57:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-03-01 17:57:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 7807. [2022-03-01 17:57:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7806 states have (on average 4.463105303612606) internal successors, (34839), 7806 states have internal predecessors, (34839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 34839 transitions. [2022-03-01 17:57:38,936 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 34839 transitions. Word has length 30 [2022-03-01 17:57:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:38,936 INFO L470 AbstractCegarLoop]: Abstraction has 7807 states and 34839 transitions. [2022-03-01 17:57:38,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 34839 transitions. [2022-03-01 17:57:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:38,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:38,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:38,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:39,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-01 17:57:39,167 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -230152816, now seen corresponding path program 24 times [2022-03-01 17:57:39,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:39,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621536475] [2022-03-01 17:57:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:39,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:39,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621536475] [2022-03-01 17:57:39,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621536475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:39,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243467533] [2022-03-01 17:57:39,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:39,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:39,331 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:39,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-01 17:57:39,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:57:39,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:39,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:39,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2022-03-01 17:57:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:39,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:40,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:40,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:40,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:40,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:57:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:40,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243467533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:40,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:40,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-01 17:57:40,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759650436] [2022-03-01 17:57:40,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:40,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:40,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:40,268 INFO L87 Difference]: Start difference. First operand 7807 states and 34839 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:43,238 INFO L93 Difference]: Finished difference Result 10507 states and 44834 transitions. [2022-03-01 17:57:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 17:57:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:43,267 INFO L225 Difference]: With dead ends: 10507 [2022-03-01 17:57:43,267 INFO L226 Difference]: Without dead ends: 10332 [2022-03-01 17:57:43,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=752, Invalid=5254, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:57:43,268 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 643 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 4229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:43,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 302 Invalid, 4229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2810 Invalid, 0 Unknown, 1162 Unchecked, 1.2s Time] [2022-03-01 17:57:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10332 states. [2022-03-01 17:57:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10332 to 7799. [2022-03-01 17:57:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7799 states, 7798 states have (on average 4.464349833290587) internal successors, (34813), 7798 states have internal predecessors, (34813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7799 states to 7799 states and 34813 transitions. [2022-03-01 17:57:43,478 INFO L78 Accepts]: Start accepts. Automaton has 7799 states and 34813 transitions. Word has length 30 [2022-03-01 17:57:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:43,479 INFO L470 AbstractCegarLoop]: Abstraction has 7799 states and 34813 transitions. [2022-03-01 17:57:43,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7799 states and 34813 transitions. [2022-03-01 17:57:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:43,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:43,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:43,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:43,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:43,710 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1206164530, now seen corresponding path program 25 times [2022-03-01 17:57:43,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:43,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612929837] [2022-03-01 17:57:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:43,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:43,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612929837] [2022-03-01 17:57:43,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612929837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:43,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451807558] [2022-03-01 17:57:43,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:43,842 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:43,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-01 17:57:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:43,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:44,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:44,149 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:44,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:57:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:44,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451807558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:44,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:44,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:57:44,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038698271] [2022-03-01 17:57:44,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:44,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:44,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:44,213 INFO L87 Difference]: Start difference. First operand 7799 states and 34813 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:45,848 INFO L93 Difference]: Finished difference Result 9152 states and 40344 transitions. [2022-03-01 17:57:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:57:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:45,874 INFO L225 Difference]: With dead ends: 9152 [2022-03-01 17:57:45,875 INFO L226 Difference]: Without dead ends: 9145 [2022-03-01 17:57:45,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:57:45,875 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 277 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 197 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2898 Invalid, 0 Unknown, 158 Unchecked, 0.8s Time] [2022-03-01 17:57:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-03-01 17:57:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 7833. [2022-03-01 17:57:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7833 states, 7832 states have (on average 4.4637385086823285) internal successors, (34960), 7832 states have internal predecessors, (34960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7833 states to 7833 states and 34960 transitions. [2022-03-01 17:57:46,091 INFO L78 Accepts]: Start accepts. Automaton has 7833 states and 34960 transitions. Word has length 30 [2022-03-01 17:57:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:46,091 INFO L470 AbstractCegarLoop]: Abstraction has 7833 states and 34960 transitions. [2022-03-01 17:57:46,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7833 states and 34960 transitions. [2022-03-01 17:57:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:46,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:46,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:46,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-03-01 17:57:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-01 17:57:46,326 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1177535379, now seen corresponding path program 3 times [2022-03-01 17:57:46,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:46,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703302103] [2022-03-01 17:57:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:46,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:46,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703302103] [2022-03-01 17:57:46,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703302103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:46,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253629701] [2022-03-01 17:57:46,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:46,457 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:46,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-01 17:57:46,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:46,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:46,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-03-01 17:57:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:46,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:47,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:47,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:57:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:47,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253629701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:47,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:47,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 17:57:47,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870792380] [2022-03-01 17:57:47,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:47,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:47,145 INFO L87 Difference]: Start difference. First operand 7833 states and 34960 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:52,144 INFO L93 Difference]: Finished difference Result 11038 states and 48335 transitions. [2022-03-01 17:57:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 17:57:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:52,173 INFO L225 Difference]: With dead ends: 11038 [2022-03-01 17:57:52,173 INFO L226 Difference]: Without dead ends: 10743 [2022-03-01 17:57:52,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1387, Invalid=6623, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 17:57:52,174 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 496 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1833 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:52,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 168 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1844 Invalid, 0 Unknown, 1833 Unchecked, 0.8s Time] [2022-03-01 17:57:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2022-03-01 17:57:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 8070. [2022-03-01 17:57:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8070 states, 8069 states have (on average 4.470690296195316) internal successors, (36074), 8069 states have internal predecessors, (36074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 36074 transitions. [2022-03-01 17:57:52,348 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 36074 transitions. Word has length 30 [2022-03-01 17:57:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:52,349 INFO L470 AbstractCegarLoop]: Abstraction has 8070 states and 36074 transitions. [2022-03-01 17:57:52,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 36074 transitions. [2022-03-01 17:57:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:52,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:52,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:52,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:52,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-01 17:57:52,572 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1395886965, now seen corresponding path program 4 times [2022-03-01 17:57:52,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:52,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378201931] [2022-03-01 17:57:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:52,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:52,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378201931] [2022-03-01 17:57:52,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378201931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:52,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532364272] [2022-03-01 17:57:52,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:52,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:52,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:52,755 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-01 17:57:52,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:52,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:57:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:53,169 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:53,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:57:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532364272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:53,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:53,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:57:53,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510287803] [2022-03-01 17:57:53,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:53,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:53,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:53,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:53,242 INFO L87 Difference]: Start difference. First operand 8070 states and 36074 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:55,563 INFO L93 Difference]: Finished difference Result 9609 states and 42336 transitions. [2022-03-01 17:57:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:57:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:55,589 INFO L225 Difference]: With dead ends: 9609 [2022-03-01 17:57:55,589 INFO L226 Difference]: Without dead ends: 9508 [2022-03-01 17:57:55,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:55,589 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:55,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 155 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:57:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9508 states. [2022-03-01 17:57:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9508 to 7977. [2022-03-01 17:57:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.4721664994984955) internal successors, (35670), 7976 states have internal predecessors, (35670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35670 transitions. [2022-03-01 17:57:55,749 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35670 transitions. Word has length 30 [2022-03-01 17:57:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:55,749 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 35670 transitions. [2022-03-01 17:57:55,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35670 transitions. [2022-03-01 17:57:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:55,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:55,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:55,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-01 17:57:55,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-01 17:57:55,971 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1842631384, now seen corresponding path program 26 times [2022-03-01 17:57:55,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:55,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549072099] [2022-03-01 17:57:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:56,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:56,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549072099] [2022-03-01 17:57:56,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549072099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:56,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272578613] [2022-03-01 17:57:56,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:56,148 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-01 17:57:56,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:56,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:57:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:56,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:56,709 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:57:56,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 50 [2022-03-01 17:57:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:56,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272578613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:56,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:56,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 17:57:56,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675635998] [2022-03-01 17:57:56,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:56,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:56,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:56,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:56,814 INFO L87 Difference]: Start difference. First operand 7977 states and 35670 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:58,053 INFO L93 Difference]: Finished difference Result 9399 states and 41444 transitions. [2022-03-01 17:57:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:57:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:57:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:58,080 INFO L225 Difference]: With dead ends: 9399 [2022-03-01 17:57:58,080 INFO L226 Difference]: Without dead ends: 9335 [2022-03-01 17:57:58,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=2393, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:58,081 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 364 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:58,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 146 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1929 Invalid, 0 Unknown, 554 Unchecked, 0.6s Time] [2022-03-01 17:57:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2022-03-01 17:57:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7975. [2022-03-01 17:57:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7975 states, 7974 states have (on average 4.4722849260095305) internal successors, (35662), 7974 states have internal predecessors, (35662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7975 states to 7975 states and 35662 transitions. [2022-03-01 17:57:58,242 INFO L78 Accepts]: Start accepts. Automaton has 7975 states and 35662 transitions. Word has length 30 [2022-03-01 17:57:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:58,242 INFO L470 AbstractCegarLoop]: Abstraction has 7975 states and 35662 transitions. [2022-03-01 17:57:58,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7975 states and 35662 transitions. [2022-03-01 17:57:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:57:58,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:58,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:58,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-01 17:57:58,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:58,474 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1407707696, now seen corresponding path program 27 times [2022-03-01 17:57:58,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:58,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512131419] [2022-03-01 17:57:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:58,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:58,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:58,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512131419] [2022-03-01 17:57:58,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512131419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:58,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624517350] [2022-03-01 17:57:58,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:58,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:58,664 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:58,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-01 17:57:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:58,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:58,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:57:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:59,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:59,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:59,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:57:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624517350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:59,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:59,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 17:57:59,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649313924] [2022-03-01 17:57:59,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:59,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:59,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:59,666 INFO L87 Difference]: Start difference. First operand 7975 states and 35662 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:04,941 INFO L93 Difference]: Finished difference Result 10842 states and 47356 transitions. [2022-03-01 17:58:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 17:58:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:04,972 INFO L225 Difference]: With dead ends: 10842 [2022-03-01 17:58:04,972 INFO L226 Difference]: Without dead ends: 10700 [2022-03-01 17:58:04,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4332 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1507, Invalid=10483, Unknown=0, NotChecked=0, Total=11990 [2022-03-01 17:58:04,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 568 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 4547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2317 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:04,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 311 Invalid, 4547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2016 Invalid, 0 Unknown, 2317 Unchecked, 1.0s Time] [2022-03-01 17:58:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2022-03-01 17:58:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 8188. [2022-03-01 17:58:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8187 states have (on average 4.467204104067424) internal successors, (36573), 8187 states have internal predecessors, (36573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 36573 transitions. [2022-03-01 17:58:05,182 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 36573 transitions. Word has length 30 [2022-03-01 17:58:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:05,182 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 36573 transitions. [2022-03-01 17:58:05,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 36573 transitions. [2022-03-01 17:58:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:05,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:05,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:05,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-01 17:58:05,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:05,403 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1910634753, now seen corresponding path program 1 times [2022-03-01 17:58:05,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:05,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060024089] [2022-03-01 17:58:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:05,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:05,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060024089] [2022-03-01 17:58:05,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060024089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:05,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199178869] [2022-03-01 17:58:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:05,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:05,632 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:05,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-01 17:58:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:05,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:05,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:05,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:06,078 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:06,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:58:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:06,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199178869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:06,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:06,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:58:06,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591438751] [2022-03-01 17:58:06,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:06,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:06,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:06,150 INFO L87 Difference]: Start difference. First operand 8188 states and 36573 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:08,629 INFO L93 Difference]: Finished difference Result 10074 states and 44197 transitions. [2022-03-01 17:58:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:58:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:08,655 INFO L225 Difference]: With dead ends: 10074 [2022-03-01 17:58:08,655 INFO L226 Difference]: Without dead ends: 9877 [2022-03-01 17:58:08,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:58:08,656 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 436 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:08,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 202 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 17:58:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9877 states. [2022-03-01 17:58:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9877 to 8124. [2022-03-01 17:58:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 4.472362427674504) internal successors, (36329), 8123 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 36329 transitions. [2022-03-01 17:58:08,808 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 36329 transitions. Word has length 30 [2022-03-01 17:58:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:08,808 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 36329 transitions. [2022-03-01 17:58:08,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 36329 transitions. [2022-03-01 17:58:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:08,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:08,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:08,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:09,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:09,038 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1310819245, now seen corresponding path program 4 times [2022-03-01 17:58:09,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:09,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121947704] [2022-03-01 17:58:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:09,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121947704] [2022-03-01 17:58:09,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121947704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:09,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489723965] [2022-03-01 17:58:09,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:09,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:09,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:09,192 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-01 17:58:09,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:09,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:09,551 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:09,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:58:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489723965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:09,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:09,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:58:09,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458649590] [2022-03-01 17:58:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:09,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:09,635 INFO L87 Difference]: Start difference. First operand 8124 states and 36329 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:12,194 INFO L93 Difference]: Finished difference Result 10693 states and 46833 transitions. [2022-03-01 17:58:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:58:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:12,224 INFO L225 Difference]: With dead ends: 10693 [2022-03-01 17:58:12,224 INFO L226 Difference]: Without dead ends: 10541 [2022-03-01 17:58:12,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=608, Invalid=3948, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:58:12,224 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 4172 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:12,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 229 Invalid, 4492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4172 Invalid, 0 Unknown, 53 Unchecked, 1.5s Time] [2022-03-01 17:58:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10541 states. [2022-03-01 17:58:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10541 to 8174. [2022-03-01 17:58:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8173 states have (on average 4.474489171662792) internal successors, (36570), 8173 states have internal predecessors, (36570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 36570 transitions. [2022-03-01 17:58:12,411 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 36570 transitions. Word has length 30 [2022-03-01 17:58:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:12,411 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 36570 transitions. [2022-03-01 17:58:12,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 36570 transitions. [2022-03-01 17:58:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:12,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:12,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:12,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:12,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:12,636 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 605402738, now seen corresponding path program 28 times [2022-03-01 17:58:12,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:12,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432528439] [2022-03-01 17:58:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:12,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:12,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432528439] [2022-03-01 17:58:12,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432528439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:12,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098564752] [2022-03-01 17:58:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:12,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:12,839 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:12,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-01 17:58:12,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:12,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:12,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:13,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:13,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:13,263 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:13,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:58:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:13,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098564752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:13,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:13,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:58:13,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510875033] [2022-03-01 17:58:13,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:13,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:13,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:13,340 INFO L87 Difference]: Start difference. First operand 8174 states and 36570 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:15,090 INFO L93 Difference]: Finished difference Result 9680 states and 42763 transitions. [2022-03-01 17:58:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:58:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:15,119 INFO L225 Difference]: With dead ends: 9680 [2022-03-01 17:58:15,119 INFO L226 Difference]: Without dead ends: 9599 [2022-03-01 17:58:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:58:15,120 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 418 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2888 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:15,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 172 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2888 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:58:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2022-03-01 17:58:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 8174. [2022-03-01 17:58:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8173 states have (on average 4.474489171662792) internal successors, (36570), 8173 states have internal predecessors, (36570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 36570 transitions. [2022-03-01 17:58:15,302 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 36570 transitions. Word has length 30 [2022-03-01 17:58:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:15,302 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 36570 transitions. [2022-03-01 17:58:15,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 36570 transitions. [2022-03-01 17:58:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:15,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:15,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:15,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:15,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-01 17:58:15,534 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -31064116, now seen corresponding path program 29 times [2022-03-01 17:58:15,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:15,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126932441] [2022-03-01 17:58:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:15,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126932441] [2022-03-01 17:58:15,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126932441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:15,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063287575] [2022-03-01 17:58:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:15,658 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:15,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-01 17:58:15,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:15,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:15,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:15,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-03-01 17:58:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:16,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9 [2022-03-01 17:58:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:16,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063287575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:16,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:16,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-03-01 17:58:16,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413267592] [2022-03-01 17:58:16,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:58:16,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:16,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:58:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:58:16,345 INFO L87 Difference]: Start difference. First operand 8174 states and 36570 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:20,069 INFO L93 Difference]: Finished difference Result 11080 states and 47478 transitions. [2022-03-01 17:58:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 17:58:20,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:20,098 INFO L225 Difference]: With dead ends: 11080 [2022-03-01 17:58:20,098 INFO L226 Difference]: Without dead ends: 10834 [2022-03-01 17:58:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1176, Invalid=8136, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:58:20,099 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 860 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1102 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:20,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 357 Invalid, 5697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 4264 Invalid, 0 Unknown, 1102 Unchecked, 1.5s Time] [2022-03-01 17:58:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2022-03-01 17:58:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8166. [2022-03-01 17:58:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 4.477281077770973) internal successors, (36557), 8165 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 36557 transitions. [2022-03-01 17:58:20,284 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 36557 transitions. Word has length 30 [2022-03-01 17:58:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:20,284 INFO L470 AbstractCegarLoop]: Abstraction has 8166 states and 36557 transitions. [2022-03-01 17:58:20,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 36557 transitions. [2022-03-01 17:58:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:20,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:20,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:20,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-01 17:58:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-01 17:58:20,515 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1850610289, now seen corresponding path program 6 times [2022-03-01 17:58:20,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:20,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627758227] [2022-03-01 17:58:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:20,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:20,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627758227] [2022-03-01 17:58:20,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627758227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:20,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880522016] [2022-03-01 17:58:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:20,695 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:20,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-01 17:58:20,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:20,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:20,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:58:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:21,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:21,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:21,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:58:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:21,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:21,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:58:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:21,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880522016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:21,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:21,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-01 17:58:21,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140950872] [2022-03-01 17:58:21,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:21,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:58:21,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:58:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:58:21,844 INFO L87 Difference]: Start difference. First operand 8166 states and 36557 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:24,024 INFO L93 Difference]: Finished difference Result 10204 states and 44245 transitions. [2022-03-01 17:58:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:58:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:24,089 INFO L225 Difference]: With dead ends: 10204 [2022-03-01 17:58:24,089 INFO L226 Difference]: Without dead ends: 10046 [2022-03-01 17:58:24,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=4266, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:58:24,090 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3021 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 280 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1548 Invalid, 0 Unknown, 3021 Unchecked, 0.6s Time] [2022-03-01 17:58:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2022-03-01 17:58:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 8203. [2022-03-01 17:58:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8203 states, 8202 states have (on average 4.473664959765911) internal successors, (36693), 8202 states have internal predecessors, (36693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8203 states to 8203 states and 36693 transitions. [2022-03-01 17:58:24,250 INFO L78 Accepts]: Start accepts. Automaton has 8203 states and 36693 transitions. Word has length 30 [2022-03-01 17:58:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:24,250 INFO L470 AbstractCegarLoop]: Abstraction has 8203 states and 36693 transitions. [2022-03-01 17:58:24,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 8203 states and 36693 transitions. [2022-03-01 17:58:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:24,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:24,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:24,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-01 17:58:24,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-01 17:58:24,483 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash 274169934, now seen corresponding path program 30 times [2022-03-01 17:58:24,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:24,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867357832] [2022-03-01 17:58:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:24,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:24,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867357832] [2022-03-01 17:58:24,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867357832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:24,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839763539] [2022-03-01 17:58:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:24,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:24,652 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:24,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-01 17:58:24,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:58:24,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:25,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-01 17:58:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:58:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839763539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:25,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:25,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:58:25,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759559445] [2022-03-01 17:58:25,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:25,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:25,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:25,764 INFO L87 Difference]: Start difference. First operand 8203 states and 36693 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:27,884 INFO L93 Difference]: Finished difference Result 10443 states and 45115 transitions. [2022-03-01 17:58:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:58:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:27,915 INFO L225 Difference]: With dead ends: 10443 [2022-03-01 17:58:27,915 INFO L226 Difference]: Without dead ends: 10361 [2022-03-01 17:58:27,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=413, Invalid=3369, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:58:27,915 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 366 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1843 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:27,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 291 Invalid, 3830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1901 Invalid, 0 Unknown, 1843 Unchecked, 0.8s Time] [2022-03-01 17:58:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2022-03-01 17:58:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 8219. [2022-03-01 17:58:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 8218 states have (on average 4.470309077634461) internal successors, (36737), 8218 states have internal predecessors, (36737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 36737 transitions. [2022-03-01 17:58:28,121 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 36737 transitions. Word has length 30 [2022-03-01 17:58:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 8219 states and 36737 transitions. [2022-03-01 17:58:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 36737 transitions. [2022-03-01 17:58:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:28,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:28,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:28,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-01 17:58:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-03-01 17:58:28,354 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash 276944590, now seen corresponding path program 31 times [2022-03-01 17:58:28,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:28,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110209026] [2022-03-01 17:58:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:28,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:28,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:28,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110209026] [2022-03-01 17:58:28,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110209026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:28,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205875563] [2022-03-01 17:58:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:28,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:28,558 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:28,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-01 17:58:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:28,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:28,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:58:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:28,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:29,189 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:29,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:58:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:29,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:29,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:58:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:29,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205875563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:29,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:29,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:58:29,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653991666] [2022-03-01 17:58:29,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:58:29,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:58:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:58:29,274 INFO L87 Difference]: Start difference. First operand 8219 states and 36737 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:30,472 INFO L93 Difference]: Finished difference Result 9157 states and 40502 transitions. [2022-03-01 17:58:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:58:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:30,496 INFO L225 Difference]: With dead ends: 9157 [2022-03-01 17:58:30,496 INFO L226 Difference]: Without dead ends: 9136 [2022-03-01 17:58:30,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:58:30,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:30,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 177 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1748 Invalid, 0 Unknown, 462 Unchecked, 0.7s Time] [2022-03-01 17:58:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2022-03-01 17:58:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 8275. [2022-03-01 17:58:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8275 states, 8274 states have (on average 4.46881798404641) internal successors, (36975), 8274 states have internal predecessors, (36975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 36975 transitions. [2022-03-01 17:58:30,654 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 36975 transitions. Word has length 30 [2022-03-01 17:58:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:30,654 INFO L470 AbstractCegarLoop]: Abstraction has 8275 states and 36975 transitions. [2022-03-01 17:58:30,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 36975 transitions. [2022-03-01 17:58:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:30,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:30,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:30,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:30,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-03-01 17:58:30,885 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -229401676, now seen corresponding path program 32 times [2022-03-01 17:58:30,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:30,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188094519] [2022-03-01 17:58:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:31,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:31,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188094519] [2022-03-01 17:58:31,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188094519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:31,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271406051] [2022-03-01 17:58:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:31,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:31,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:31,091 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:31,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-01 17:58:31,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:31,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:31,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:58:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:31,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:31,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:58:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271406051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:32,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:32,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:58:32,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366050989] [2022-03-01 17:58:32,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:32,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:58:32,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:58:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:58:32,022 INFO L87 Difference]: Start difference. First operand 8275 states and 36975 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:34,373 INFO L93 Difference]: Finished difference Result 10685 states and 46084 transitions. [2022-03-01 17:58:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:58:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:34,403 INFO L225 Difference]: With dead ends: 10685 [2022-03-01 17:58:34,403 INFO L226 Difference]: Without dead ends: 10603 [2022-03-01 17:58:34,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=3589, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:58:34,404 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 3931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1202 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:34,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 320 Invalid, 3931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2618 Invalid, 0 Unknown, 1202 Unchecked, 1.0s Time] [2022-03-01 17:58:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10603 states. [2022-03-01 17:58:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10603 to 8291. [2022-03-01 17:58:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8291 states, 8290 states have (on average 4.466103739445114) internal successors, (37024), 8290 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 37024 transitions. [2022-03-01 17:58:34,597 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 37024 transitions. Word has length 30 [2022-03-01 17:58:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:34,597 INFO L470 AbstractCegarLoop]: Abstraction has 8291 states and 37024 transitions. [2022-03-01 17:58:34,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 37024 transitions. [2022-03-01 17:58:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:34,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:34,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:34,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-01 17:58:34,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-01 17:58:34,821 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash -228614035, now seen corresponding path program 2 times [2022-03-01 17:58:34,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:34,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535940601] [2022-03-01 17:58:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:35,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:35,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535940601] [2022-03-01 17:58:35,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535940601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:35,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581686105] [2022-03-01 17:58:35,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:35,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:35,027 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:35,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-01 17:58:35,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:35,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:35,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:58:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:35,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:35,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:58:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:36,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581686105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:36,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:36,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:58:36,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420548113] [2022-03-01 17:58:36,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:36,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:58:36,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:58:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:58:36,013 INFO L87 Difference]: Start difference. First operand 8291 states and 37024 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:38,235 INFO L93 Difference]: Finished difference Result 10552 states and 46179 transitions. [2022-03-01 17:58:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:58:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:38,263 INFO L225 Difference]: With dead ends: 10552 [2022-03-01 17:58:38,264 INFO L226 Difference]: Without dead ends: 10454 [2022-03-01 17:58:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=3209, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:58:38,264 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 436 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:38,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 309 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2184 Invalid, 0 Unknown, 1580 Unchecked, 1.0s Time] [2022-03-01 17:58:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2022-03-01 17:58:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 8391. [2022-03-01 17:58:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 4.466507747318236) internal successors, (37474), 8390 states have internal predecessors, (37474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 37474 transitions. [2022-03-01 17:58:38,441 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 37474 transitions. Word has length 30 [2022-03-01 17:58:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:38,441 INFO L470 AbstractCegarLoop]: Abstraction has 8391 states and 37474 transitions. [2022-03-01 17:58:38,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 37474 transitions. [2022-03-01 17:58:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:38,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:38,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-01 17:58:38,671 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -734960301, now seen corresponding path program 3 times [2022-03-01 17:58:38,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:38,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193821572] [2022-03-01 17:58:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:38,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:38,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193821572] [2022-03-01 17:58:38,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193821572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:38,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588931150] [2022-03-01 17:58:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:38,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:38,873 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:38,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-01 17:58:38,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:58:38,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:38,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:39,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:58:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:39,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:39,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:58:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:39,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588931150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:39,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:39,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:58:39,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920914523] [2022-03-01 17:58:39,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:39,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:58:39,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:58:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:58:39,848 INFO L87 Difference]: Start difference. First operand 8391 states and 37474 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:41,745 INFO L93 Difference]: Finished difference Result 10789 states and 46473 transitions. [2022-03-01 17:58:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:58:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:41,774 INFO L225 Difference]: With dead ends: 10789 [2022-03-01 17:58:41,774 INFO L226 Difference]: Without dead ends: 10665 [2022-03-01 17:58:41,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:58:41,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 348 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1233 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:41,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 279 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2084 Invalid, 0 Unknown, 1233 Unchecked, 0.8s Time] [2022-03-01 17:58:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10665 states. [2022-03-01 17:58:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10665 to 8429. [2022-03-01 17:58:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8428 states have (on average 4.462149976269577) internal successors, (37607), 8428 states have internal predecessors, (37607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 37607 transitions. [2022-03-01 17:58:41,957 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 37607 transitions. Word has length 30 [2022-03-01 17:58:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:41,958 INFO L470 AbstractCegarLoop]: Abstraction has 8429 states and 37607 transitions. [2022-03-01 17:58:41,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 37607 transitions. [2022-03-01 17:58:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:41,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:41,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:41,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-01 17:58:42,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:42,189 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1359174006, now seen corresponding path program 33 times [2022-03-01 17:58:42,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:42,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652990818] [2022-03-01 17:58:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:42,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652990818] [2022-03-01 17:58:42,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652990818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:42,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65757684] [2022-03-01 17:58:42,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:42,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:42,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:42,420 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:42,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-01 17:58:42,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:42,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:42,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:42,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:42,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:58:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:43,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:43,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-03-01 17:58:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:43,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65757684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:43,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:43,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 17:58:43,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227313879] [2022-03-01 17:58:43,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:43,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:43,314 INFO L87 Difference]: Start difference. First operand 8429 states and 37607 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:48,160 INFO L93 Difference]: Finished difference Result 11989 states and 51891 transitions. [2022-03-01 17:58:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 17:58:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:48,192 INFO L225 Difference]: With dead ends: 11989 [2022-03-01 17:58:48,192 INFO L226 Difference]: Without dead ends: 11864 [2022-03-01 17:58:48,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1571, Invalid=7935, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 17:58:48,192 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 660 mSDsluCounter, 2454 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2448 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:48,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 300 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2390 Invalid, 0 Unknown, 2448 Unchecked, 1.1s Time] [2022-03-01 17:58:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11864 states. [2022-03-01 17:58:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11864 to 8566. [2022-03-01 17:58:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.449153531815528) internal successors, (38107), 8565 states have internal predecessors, (38107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 38107 transitions. [2022-03-01 17:58:48,390 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 38107 transitions. Word has length 30 [2022-03-01 17:58:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:48,391 INFO L470 AbstractCegarLoop]: Abstraction has 8566 states and 38107 transitions. [2022-03-01 17:58:48,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 38107 transitions. [2022-03-01 17:58:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:48,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:48,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:48,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:48,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,622 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1470698069, now seen corresponding path program 5 times [2022-03-01 17:58:48,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:48,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641332884] [2022-03-01 17:58:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:48,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:48,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641332884] [2022-03-01 17:58:48,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641332884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:48,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378098766] [2022-03-01 17:58:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:48,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:48,804 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:48,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-01 17:58:48,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:49,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:49,245 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:49,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:58:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:49,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378098766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:49,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:49,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:58:49,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706355113] [2022-03-01 17:58:49,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:49,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:49,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:49,364 INFO L87 Difference]: Start difference. First operand 8566 states and 38107 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:51,328 INFO L93 Difference]: Finished difference Result 10865 states and 47365 transitions. [2022-03-01 17:58:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:58:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:51,361 INFO L225 Difference]: With dead ends: 10865 [2022-03-01 17:58:51,361 INFO L226 Difference]: Without dead ends: 10794 [2022-03-01 17:58:51,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=2779, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:58:51,361 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 446 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:51,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 185 Invalid, 3233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3003 Invalid, 0 Unknown, 15 Unchecked, 1.2s Time] [2022-03-01 17:58:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2022-03-01 17:58:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 8662. [2022-03-01 17:58:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8662 states, 8661 states have (on average 4.44071123426856) internal successors, (38461), 8661 states have internal predecessors, (38461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8662 states to 8662 states and 38461 transitions. [2022-03-01 17:58:51,556 INFO L78 Accepts]: Start accepts. Automaton has 8662 states and 38461 transitions. Word has length 30 [2022-03-01 17:58:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:51,556 INFO L470 AbstractCegarLoop]: Abstraction has 8662 states and 38461 transitions. [2022-03-01 17:58:51,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8662 states and 38461 transitions. [2022-03-01 17:58:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:51,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:51,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:51,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:51,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:51,789 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 566860072, now seen corresponding path program 34 times [2022-03-01 17:58:51,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:51,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398031170] [2022-03-01 17:58:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:51,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:51,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398031170] [2022-03-01 17:58:51,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398031170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702675792] [2022-03-01 17:58:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:51,966 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:51,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-01 17:58:51,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:52,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:52,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:52,461 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:52,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:58:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:52,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702675792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:52,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:52,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:58:52,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4802210] [2022-03-01 17:58:52,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:52,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:52,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:52,524 INFO L87 Difference]: Start difference. First operand 8662 states and 38461 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:54,785 INFO L93 Difference]: Finished difference Result 10297 states and 45122 transitions. [2022-03-01 17:58:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:58:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:54,815 INFO L225 Difference]: With dead ends: 10297 [2022-03-01 17:58:54,815 INFO L226 Difference]: Without dead ends: 10226 [2022-03-01 17:58:54,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:58:54,815 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 375 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:54,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 216 Invalid, 3889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3702 Invalid, 0 Unknown, 25 Unchecked, 1.4s Time] [2022-03-01 17:58:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10226 states. [2022-03-01 17:58:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10226 to 8694. [2022-03-01 17:58:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8694 states, 8693 states have (on average 4.436443115150121) internal successors, (38566), 8693 states have internal predecessors, (38566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8694 states to 8694 states and 38566 transitions. [2022-03-01 17:58:54,988 INFO L78 Accepts]: Start accepts. Automaton has 8694 states and 38566 transitions. Word has length 30 [2022-03-01 17:58:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:54,988 INFO L470 AbstractCegarLoop]: Abstraction has 8694 states and 38566 transitions. [2022-03-01 17:58:54,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8694 states and 38566 transitions. [2022-03-01 17:58:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:55,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:55,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:55,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:55,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-01 17:58:55,220 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 60513806, now seen corresponding path program 35 times [2022-03-01 17:58:55,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:55,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363733112] [2022-03-01 17:58:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:55,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:55,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363733112] [2022-03-01 17:58:55,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363733112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:55,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384577172] [2022-03-01 17:58:55,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:55,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:55,416 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:55,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-01 17:58:55,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:55,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:55,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:55,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:58:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:55,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:55,904 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:55,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:58:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:55,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384577172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:55,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:55,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:58:55,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324397698] [2022-03-01 17:58:55,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:55,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:55,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:55,990 INFO L87 Difference]: Start difference. First operand 8694 states and 38566 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:58,477 INFO L93 Difference]: Finished difference Result 10314 states and 45192 transitions. [2022-03-01 17:58:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:58:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:58:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:58,507 INFO L225 Difference]: With dead ends: 10314 [2022-03-01 17:58:58,507 INFO L226 Difference]: Without dead ends: 10250 [2022-03-01 17:58:58,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:58:58,508 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 370 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:58,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 203 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3592 Invalid, 0 Unknown, 18 Unchecked, 1.4s Time] [2022-03-01 17:58:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2022-03-01 17:58:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 8666. [2022-03-01 17:58:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 8665 states have (on average 4.4436237738026545) internal successors, (38504), 8665 states have internal predecessors, (38504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 38504 transitions. [2022-03-01 17:58:58,706 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 38504 transitions. Word has length 30 [2022-03-01 17:58:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:58,706 INFO L470 AbstractCegarLoop]: Abstraction has 8666 states and 38504 transitions. [2022-03-01 17:58:58,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 38504 transitions. [2022-03-01 17:58:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:58:58,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:58,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:58,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:58,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:58,939 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -789471230, now seen corresponding path program 36 times [2022-03-01 17:58:58,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:58,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764169253] [2022-03-01 17:58:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:59,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764169253] [2022-03-01 17:58:59,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764169253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:59,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946065058] [2022-03-01 17:58:59,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:59,241 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:59,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-01 17:58:59,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:58:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:58:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:59,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-03-01 17:58:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:00,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:00,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:00,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:00,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:59:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:00,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946065058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:00,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:00,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:59:00,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2952282] [2022-03-01 17:59:00,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:59:00,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:59:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:00,376 INFO L87 Difference]: Start difference. First operand 8666 states and 38504 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:03,016 INFO L93 Difference]: Finished difference Result 11213 states and 48225 transitions. [2022-03-01 17:59:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 17:59:03,016 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:03,048 INFO L225 Difference]: With dead ends: 11213 [2022-03-01 17:59:03,048 INFO L226 Difference]: Without dead ends: 11185 [2022-03-01 17:59:03,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:59:03,049 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 465 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1857 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:03,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 250 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1687 Invalid, 0 Unknown, 1857 Unchecked, 0.7s Time] [2022-03-01 17:59:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11185 states. [2022-03-01 17:59:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11185 to 8744. [2022-03-01 17:59:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8744 states, 8743 states have (on average 4.437264096991879) internal successors, (38795), 8743 states have internal predecessors, (38795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8744 states to 8744 states and 38795 transitions. [2022-03-01 17:59:03,253 INFO L78 Accepts]: Start accepts. Automaton has 8744 states and 38795 transitions. Word has length 30 [2022-03-01 17:59:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:03,253 INFO L470 AbstractCegarLoop]: Abstraction has 8744 states and 38795 transitions. [2022-03-01 17:59:03,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 8744 states and 38795 transitions. [2022-03-01 17:59:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:03,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:03,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:03,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:03,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-01 17:59:03,486 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1698041603, now seen corresponding path program 4 times [2022-03-01 17:59:03,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:03,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104783776] [2022-03-01 17:59:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:03,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104783776] [2022-03-01 17:59:03,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104783776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:03,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107816848] [2022-03-01 17:59:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:03,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:03,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:03,628 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:03,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-01 17:59:03,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:03,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:59:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:04,009 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:04,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-03-01 17:59:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107816848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:04,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:04,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:59:04,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689010935] [2022-03-01 17:59:04,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:04,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:04,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:04,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:04,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:04,064 INFO L87 Difference]: Start difference. First operand 8744 states and 38795 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:06,434 INFO L93 Difference]: Finished difference Result 10467 states and 45746 transitions. [2022-03-01 17:59:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:59:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:06,462 INFO L225 Difference]: With dead ends: 10467 [2022-03-01 17:59:06,462 INFO L226 Difference]: Without dead ends: 10344 [2022-03-01 17:59:06,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:59:06,463 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 366 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:06,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 239 Invalid, 4332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:59:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2022-03-01 17:59:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 8596. [2022-03-01 17:59:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 4.450610820244328) internal successors, (38253), 8595 states have internal predecessors, (38253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38253 transitions. [2022-03-01 17:59:06,632 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38253 transitions. Word has length 30 [2022-03-01 17:59:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:06,632 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 38253 transitions. [2022-03-01 17:59:06,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38253 transitions. [2022-03-01 17:59:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:06,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:06,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:06,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:06,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-01 17:59:06,863 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1201662257, now seen corresponding path program 6 times [2022-03-01 17:59:06,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:06,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986360811] [2022-03-01 17:59:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:07,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986360811] [2022-03-01 17:59:07,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986360811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:07,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900721568] [2022-03-01 17:59:07,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:07,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:07,111 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:07,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-01 17:59:07,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:07,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:07,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:07,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2022-03-01 17:59:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:59:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900721568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:07,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:07,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-01 17:59:07,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501400889] [2022-03-01 17:59:07,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:07,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:07,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:07,857 INFO L87 Difference]: Start difference. First operand 8596 states and 38253 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:11,860 INFO L93 Difference]: Finished difference Result 12162 states and 51677 transitions. [2022-03-01 17:59:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 17:59:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:11,892 INFO L225 Difference]: With dead ends: 12162 [2022-03-01 17:59:11,892 INFO L226 Difference]: Without dead ends: 11940 [2022-03-01 17:59:11,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=940, Invalid=6542, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 17:59:11,893 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 728 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2341 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:11,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 352 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3267 Invalid, 0 Unknown, 2341 Unchecked, 1.5s Time] [2022-03-01 17:59:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2022-03-01 17:59:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 8510. [2022-03-01 17:59:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 4.454930074039252) internal successors, (37907), 8509 states have internal predecessors, (37907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 37907 transitions. [2022-03-01 17:59:12,088 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 37907 transitions. Word has length 30 [2022-03-01 17:59:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:12,088 INFO L470 AbstractCegarLoop]: Abstraction has 8510 states and 37907 transitions. [2022-03-01 17:59:12,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 37907 transitions. [2022-03-01 17:59:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:12,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:12,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:12,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-01 17:59:12,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-01 17:59:12,311 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:12,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1878837290, now seen corresponding path program 1 times [2022-03-01 17:59:12,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:12,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657980817] [2022-03-01 17:59:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:12,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:12,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657980817] [2022-03-01 17:59:12,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657980817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:12,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925732425] [2022-03-01 17:59:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:12,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:12,504 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:12,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-01 17:59:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:12,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:59:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:13,068 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:13,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:13,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:13,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925732425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:13,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:13,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 17:59:13,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892519244] [2022-03-01 17:59:13,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:13,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:13,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:13,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:13,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:13,142 INFO L87 Difference]: Start difference. First operand 8510 states and 37907 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:14,074 INFO L93 Difference]: Finished difference Result 8877 states and 39328 transitions. [2022-03-01 17:59:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:59:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:14,100 INFO L225 Difference]: With dead ends: 8877 [2022-03-01 17:59:14,101 INFO L226 Difference]: Without dead ends: 8836 [2022-03-01 17:59:14,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:14,101 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:14,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 114 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1682 Invalid, 0 Unknown, 264 Unchecked, 0.6s Time] [2022-03-01 17:59:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2022-03-01 17:59:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8531. [2022-03-01 17:59:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8531 states, 8530 states have (on average 4.453810082063306) internal successors, (37991), 8530 states have internal predecessors, (37991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8531 states to 8531 states and 37991 transitions. [2022-03-01 17:59:14,312 INFO L78 Accepts]: Start accepts. Automaton has 8531 states and 37991 transitions. Word has length 30 [2022-03-01 17:59:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:14,312 INFO L470 AbstractCegarLoop]: Abstraction has 8531 states and 37991 transitions. [2022-03-01 17:59:14,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8531 states and 37991 transitions. [2022-03-01 17:59:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:14,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:14,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:14,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-03-01 17:59:14,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:14,544 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -509086556, now seen corresponding path program 2 times [2022-03-01 17:59:14,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:14,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839942093] [2022-03-01 17:59:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:14,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:14,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839942093] [2022-03-01 17:59:14,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839942093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:14,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286770197] [2022-03-01 17:59:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:14,759 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:14,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-01 17:59:14,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:14,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:15,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-01 17:59:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:15,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:15,354 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:59:15,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:59:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286770197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:15,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:15,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 17:59:15,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600379711] [2022-03-01 17:59:15,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:15,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:15,462 INFO L87 Difference]: Start difference. First operand 8531 states and 37991 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:16,277 INFO L93 Difference]: Finished difference Result 8869 states and 39315 transitions. [2022-03-01 17:59:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:59:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:16,302 INFO L225 Difference]: With dead ends: 8869 [2022-03-01 17:59:16,303 INFO L226 Difference]: Without dead ends: 8836 [2022-03-01 17:59:16,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=1556, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:59:16,303 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:16,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 104 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1152 Invalid, 0 Unknown, 483 Unchecked, 0.4s Time] [2022-03-01 17:59:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2022-03-01 17:59:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8531. [2022-03-01 17:59:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8531 states, 8530 states have (on average 4.453810082063306) internal successors, (37991), 8530 states have internal predecessors, (37991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8531 states to 8531 states and 37991 transitions. [2022-03-01 17:59:16,516 INFO L78 Accepts]: Start accepts. Automaton has 8531 states and 37991 transitions. Word has length 30 [2022-03-01 17:59:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:16,516 INFO L470 AbstractCegarLoop]: Abstraction has 8531 states and 37991 transitions. [2022-03-01 17:59:16,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8531 states and 37991 transitions. [2022-03-01 17:59:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:16,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:16,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:16,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:16,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:16,743 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash 628018918, now seen corresponding path program 3 times [2022-03-01 17:59:16,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:16,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961114617] [2022-03-01 17:59:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:16,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:16,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:16,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961114617] [2022-03-01 17:59:16,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961114617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:16,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515044731] [2022-03-01 17:59:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:16,962 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:16,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-01 17:59:17,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:59:17,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:17,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:17,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:17,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-03-01 17:59:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:17,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:17,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-03-01 17:59:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515044731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:18,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:18,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 17:59:18,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701807816] [2022-03-01 17:59:18,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:18,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:18,051 INFO L87 Difference]: Start difference. First operand 8531 states and 37991 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:21,263 INFO L93 Difference]: Finished difference Result 10439 states and 45851 transitions. [2022-03-01 17:59:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 17:59:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:21,303 INFO L225 Difference]: With dead ends: 10439 [2022-03-01 17:59:21,303 INFO L226 Difference]: Without dead ends: 10366 [2022-03-01 17:59:21,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=922, Invalid=5884, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 17:59:21,304 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 366 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2198 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:21,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 200 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1776 Invalid, 0 Unknown, 2198 Unchecked, 0.7s Time] [2022-03-01 17:59:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10366 states. [2022-03-01 17:59:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10366 to 8576. [2022-03-01 17:59:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 8575 states have (on average 4.4524781341107875) internal successors, (38180), 8575 states have internal predecessors, (38180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 38180 transitions. [2022-03-01 17:59:21,536 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 38180 transitions. Word has length 30 [2022-03-01 17:59:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:21,536 INFO L470 AbstractCegarLoop]: Abstraction has 8576 states and 38180 transitions. [2022-03-01 17:59:21,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 38180 transitions. [2022-03-01 17:59:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:21,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:21,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:21,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-03-01 17:59:21,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:21,770 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -296930938, now seen corresponding path program 4 times [2022-03-01 17:59:21,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:21,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567749019] [2022-03-01 17:59:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:21,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:21,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567749019] [2022-03-01 17:59:21,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567749019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:21,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781181239] [2022-03-01 17:59:21,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:21,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:21,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:21,989 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:21,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-01 17:59:22,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:22,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:22,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:59:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:22,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:22,581 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:22,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:22,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:22,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781181239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:22,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:22,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-01 17:59:22,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168579360] [2022-03-01 17:59:22,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:22,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:22,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:22,666 INFO L87 Difference]: Start difference. First operand 8576 states and 38180 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:23,678 INFO L93 Difference]: Finished difference Result 8956 states and 39668 transitions. [2022-03-01 17:59:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:59:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:23,705 INFO L225 Difference]: With dead ends: 8956 [2022-03-01 17:59:23,705 INFO L226 Difference]: Without dead ends: 8905 [2022-03-01 17:59:23,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:23,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:23,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 118 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1715 Invalid, 0 Unknown, 417 Unchecked, 0.6s Time] [2022-03-01 17:59:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states. [2022-03-01 17:59:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8905 to 8594. [2022-03-01 17:59:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 4.452461305713953) internal successors, (38260), 8593 states have internal predecessors, (38260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 38260 transitions. [2022-03-01 17:59:23,901 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 38260 transitions. Word has length 30 [2022-03-01 17:59:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 38260 transitions. [2022-03-01 17:59:23,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 38260 transitions. [2022-03-01 17:59:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:23,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:23,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:23,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-03-01 17:59:24,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:24,133 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -167848219, now seen corresponding path program 1 times [2022-03-01 17:59:24,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:24,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854898800] [2022-03-01 17:59:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:24,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:24,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854898800] [2022-03-01 17:59:24,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854898800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:24,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57871918] [2022-03-01 17:59:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:24,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:24,326 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:24,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-01 17:59:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:24,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:24,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:24,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 17:59:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:24,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:24,920 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:24,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:24,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:24,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:24,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57871918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:24,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:24,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-01 17:59:25,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703169205] [2022-03-01 17:59:25,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:25,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:25,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:25,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:25,000 INFO L87 Difference]: Start difference. First operand 8594 states and 38260 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:25,892 INFO L93 Difference]: Finished difference Result 8996 states and 39833 transitions. [2022-03-01 17:59:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:59:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:25,967 INFO L225 Difference]: With dead ends: 8996 [2022-03-01 17:59:25,967 INFO L226 Difference]: Without dead ends: 8963 [2022-03-01 17:59:25,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:25,968 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:25,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 122 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1767 Invalid, 0 Unknown, 28 Unchecked, 0.6s Time] [2022-03-01 17:59:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8963 states. [2022-03-01 17:59:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8963 to 8591. [2022-03-01 17:59:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 4.453317811408614) internal successors, (38254), 8590 states have internal predecessors, (38254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 38254 transitions. [2022-03-01 17:59:26,115 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 38254 transitions. Word has length 30 [2022-03-01 17:59:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 38254 transitions. [2022-03-01 17:59:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 38254 transitions. [2022-03-01 17:59:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:26,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:26,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:26,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:26,347 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2058020683, now seen corresponding path program 1 times [2022-03-01 17:59:26,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:26,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630365665] [2022-03-01 17:59:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:26,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:26,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630365665] [2022-03-01 17:59:26,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630365665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:26,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971251051] [2022-03-01 17:59:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:26,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:26,558 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:26,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-01 17:59:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:59:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:27,176 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:27,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:27,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:27,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:27,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:27,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:27,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971251051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:27,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:27,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:59:27,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569118198] [2022-03-01 17:59:27,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:27,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:27,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:27,266 INFO L87 Difference]: Start difference. First operand 8591 states and 38254 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:28,415 INFO L93 Difference]: Finished difference Result 9177 states and 40549 transitions. [2022-03-01 17:59:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:59:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:28,441 INFO L225 Difference]: With dead ends: 9177 [2022-03-01 17:59:28,441 INFO L226 Difference]: Without dead ends: 9136 [2022-03-01 17:59:28,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:59:28,441 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:28,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 158 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1638 Invalid, 0 Unknown, 455 Unchecked, 0.7s Time] [2022-03-01 17:59:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2022-03-01 17:59:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 8596. [2022-03-01 17:59:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 4.453752181500873) internal successors, (38280), 8595 states have internal predecessors, (38280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38280 transitions. [2022-03-01 17:59:28,654 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38280 transitions. Word has length 30 [2022-03-01 17:59:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 38280 transitions. [2022-03-01 17:59:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38280 transitions. [2022-03-01 17:59:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:28,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:28,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:28,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:28,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2022-03-01 17:59:28,887 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -870643986, now seen corresponding path program 5 times [2022-03-01 17:59:28,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:28,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117254822] [2022-03-01 17:59:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:29,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117254822] [2022-03-01 17:59:29,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117254822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:29,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415693764] [2022-03-01 17:59:29,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:29,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:29,118 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:29,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-01 17:59:29,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:59:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:29,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:59:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:29,679 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:29,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415693764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:29,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:29,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-03-01 17:59:29,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580982787] [2022-03-01 17:59:29,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:29,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:29,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:29,748 INFO L87 Difference]: Start difference. First operand 8596 states and 38280 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:31,270 INFO L93 Difference]: Finished difference Result 9286 states and 40984 transitions. [2022-03-01 17:59:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:59:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:31,297 INFO L225 Difference]: With dead ends: 9286 [2022-03-01 17:59:31,297 INFO L226 Difference]: Without dead ends: 9213 [2022-03-01 17:59:31,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:59:31,297 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:31,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 175 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1893 Invalid, 0 Unknown, 601 Unchecked, 0.9s Time] [2022-03-01 17:59:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9213 states. [2022-03-01 17:59:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9213 to 8630. [2022-03-01 17:59:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 4.452543747827095) internal successors, (38421), 8629 states have internal predecessors, (38421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 38421 transitions. [2022-03-01 17:59:31,536 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 38421 transitions. Word has length 30 [2022-03-01 17:59:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 38421 transitions. [2022-03-01 17:59:31,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 38421 transitions. [2022-03-01 17:59:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:31,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:31,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:31,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-03-01 17:59:31,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:31,767 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash -203933971, now seen corresponding path program 2 times [2022-03-01 17:59:31,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:31,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287340606] [2022-03-01 17:59:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:32,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287340606] [2022-03-01 17:59:32,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287340606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:32,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347488565] [2022-03-01 17:59:32,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:32,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:32,047 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:32,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-01 17:59:32,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:32,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:32,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:32,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:32,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 17:59:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:32,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:32,723 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:59:32,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:59:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347488565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:32,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:32,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:32,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575323992] [2022-03-01 17:59:32,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:32,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:32,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:32,810 INFO L87 Difference]: Start difference. First operand 8630 states and 38421 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:33,787 INFO L93 Difference]: Finished difference Result 9047 states and 40016 transitions. [2022-03-01 17:59:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:59:33,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:33,812 INFO L225 Difference]: With dead ends: 9047 [2022-03-01 17:59:33,812 INFO L226 Difference]: Without dead ends: 8982 [2022-03-01 17:59:33,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:59:33,813 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:33,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 130 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1990 Invalid, 0 Unknown, 464 Unchecked, 0.6s Time] [2022-03-01 17:59:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8982 states. [2022-03-01 17:59:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8982 to 8642. [2022-03-01 17:59:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8641 states have (on average 4.4508737414651085) internal successors, (38460), 8641 states have internal predecessors, (38460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 38460 transitions. [2022-03-01 17:59:34,045 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 38460 transitions. Word has length 30 [2022-03-01 17:59:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:34,046 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 38460 transitions. [2022-03-01 17:59:34,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 38460 transitions. [2022-03-01 17:59:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:34,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:34,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:34,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-01 17:59:34,271 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -137181101, now seen corresponding path program 3 times [2022-03-01 17:59:34,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:34,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386211066] [2022-03-01 17:59:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:34,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:34,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386211066] [2022-03-01 17:59:34,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386211066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:34,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446461846] [2022-03-01 17:59:34,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:34,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:34,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:34,512 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:34,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-01 17:59:34,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:59:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:34,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:34,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:34,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 17:59:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:35,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:35,115 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 17:59:35,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 17:59:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:35,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446461846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:35,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:35,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:59:35,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038768601] [2022-03-01 17:59:35,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:35,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:59:35,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:59:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:59:35,223 INFO L87 Difference]: Start difference. First operand 8642 states and 38460 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:36,170 INFO L93 Difference]: Finished difference Result 9040 states and 39994 transitions. [2022-03-01 17:59:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:59:36,171 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:36,196 INFO L225 Difference]: With dead ends: 9040 [2022-03-01 17:59:36,197 INFO L226 Difference]: Without dead ends: 8967 [2022-03-01 17:59:36,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:59:36,197 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 758 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:36,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 167 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2058 Invalid, 0 Unknown, 758 Unchecked, 0.6s Time] [2022-03-01 17:59:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2022-03-01 17:59:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 8643. [2022-03-01 17:59:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8643 states, 8642 states have (on average 4.450705855126128) internal successors, (38463), 8642 states have internal predecessors, (38463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8643 states to 8643 states and 38463 transitions. [2022-03-01 17:59:36,457 INFO L78 Accepts]: Start accepts. Automaton has 8643 states and 38463 transitions. Word has length 30 [2022-03-01 17:59:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:36,457 INFO L470 AbstractCegarLoop]: Abstraction has 8643 states and 38463 transitions. [2022-03-01 17:59:36,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8643 states and 38463 transitions. [2022-03-01 17:59:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:36,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:36,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:36,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:36,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-01 17:59:36,690 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash 271147347, now seen corresponding path program 4 times [2022-03-01 17:59:36,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:36,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271028639] [2022-03-01 17:59:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:36,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:36,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271028639] [2022-03-01 17:59:36,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271028639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:36,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353821928] [2022-03-01 17:59:36,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:36,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:36,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:36,861 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:36,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-01 17:59:36,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:36,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:37,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:59:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:37,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:37,277 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:37,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:37,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:37,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:37,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353821928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:37,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:37,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-03-01 17:59:37,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767261828] [2022-03-01 17:59:37,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:37,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:37,332 INFO L87 Difference]: Start difference. First operand 8643 states and 38463 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:38,199 INFO L93 Difference]: Finished difference Result 9149 states and 40440 transitions. [2022-03-01 17:59:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:59:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:38,222 INFO L225 Difference]: With dead ends: 9149 [2022-03-01 17:59:38,223 INFO L226 Difference]: Without dead ends: 9083 [2022-03-01 17:59:38,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:38,223 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:38,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 129 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1887 Invalid, 0 Unknown, 428 Unchecked, 0.7s Time] [2022-03-01 17:59:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2022-03-01 17:59:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 8643. [2022-03-01 17:59:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8643 states, 8642 states have (on average 4.449895857440407) internal successors, (38456), 8642 states have internal predecessors, (38456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8643 states to 8643 states and 38456 transitions. [2022-03-01 17:59:38,382 INFO L78 Accepts]: Start accepts. Automaton has 8643 states and 38456 transitions. Word has length 30 [2022-03-01 17:59:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:38,382 INFO L470 AbstractCegarLoop]: Abstraction has 8643 states and 38456 transitions. [2022-03-01 17:59:38,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8643 states and 38456 transitions. [2022-03-01 17:59:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:38,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:38,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:38,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-03-01 17:59:38,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-01 17:59:38,613 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1705680498, now seen corresponding path program 1 times [2022-03-01 17:59:38,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:38,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006744667] [2022-03-01 17:59:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:38,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:38,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006744667] [2022-03-01 17:59:38,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006744667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:38,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736004955] [2022-03-01 17:59:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:38,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:38,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:38,855 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:38,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-01 17:59:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:39,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:39,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:39,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 17:59:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:39,521 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:39,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:39,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736004955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:39,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:39,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:59:39,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403424211] [2022-03-01 17:59:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:39,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:59:39,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:59:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:59:39,606 INFO L87 Difference]: Start difference. First operand 8643 states and 38456 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:40,758 INFO L93 Difference]: Finished difference Result 9302 states and 40962 transitions. [2022-03-01 17:59:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:59:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:40,788 INFO L225 Difference]: With dead ends: 9302 [2022-03-01 17:59:40,789 INFO L226 Difference]: Without dead ends: 9195 [2022-03-01 17:59:40,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:59:40,789 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:40,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 168 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2004 Invalid, 0 Unknown, 257 Unchecked, 0.8s Time] [2022-03-01 17:59:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2022-03-01 17:59:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 8614. [2022-03-01 17:59:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8614 states, 8613 states have (on average 4.45141065830721) internal successors, (38340), 8613 states have internal predecessors, (38340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8614 states to 8614 states and 38340 transitions. [2022-03-01 17:59:41,005 INFO L78 Accepts]: Start accepts. Automaton has 8614 states and 38340 transitions. Word has length 30 [2022-03-01 17:59:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 8614 states and 38340 transitions. [2022-03-01 17:59:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 8614 states and 38340 transitions. [2022-03-01 17:59:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:41,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:41,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:41,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-01 17:59:41,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:41,239 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -891537741, now seen corresponding path program 5 times [2022-03-01 17:59:41,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:41,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212977944] [2022-03-01 17:59:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:41,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212977944] [2022-03-01 17:59:41,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212977944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:41,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570959417] [2022-03-01 17:59:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:41,431 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:41,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-01 17:59:41,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:59:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:42,077 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:42,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:42,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:42,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570959417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:42,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:42,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:59:42,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127387523] [2022-03-01 17:59:42,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:42,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:59:42,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:59:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:59:42,165 INFO L87 Difference]: Start difference. First operand 8614 states and 38340 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:43,177 INFO L93 Difference]: Finished difference Result 9335 states and 41213 transitions. [2022-03-01 17:59:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:59:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:43,202 INFO L225 Difference]: With dead ends: 9335 [2022-03-01 17:59:43,203 INFO L226 Difference]: Without dead ends: 9270 [2022-03-01 17:59:43,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:59:43,203 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:43,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 199 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1542 Invalid, 0 Unknown, 377 Unchecked, 0.6s Time] [2022-03-01 17:59:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2022-03-01 17:59:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 8634. [2022-03-01 17:59:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 4.450596548129272) internal successors, (38422), 8633 states have internal predecessors, (38422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 38422 transitions. [2022-03-01 17:59:43,369 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 38422 transitions. Word has length 30 [2022-03-01 17:59:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:43,369 INFO L470 AbstractCegarLoop]: Abstraction has 8634 states and 38422 transitions. [2022-03-01 17:59:43,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 38422 transitions. [2022-03-01 17:59:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:43,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:43,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:43,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:43,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-03-01 17:59:43,600 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 959849365, now seen corresponding path program 6 times [2022-03-01 17:59:43,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:43,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318576070] [2022-03-01 17:59:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:43,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:43,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318576070] [2022-03-01 17:59:43,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318576070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:43,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873603655] [2022-03-01 17:59:43,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:43,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:43,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:43,740 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:43,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-01 17:59:43,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:59:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:43,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:43,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-03-01 17:59:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:44,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:44,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:44,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:44,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:59:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:44,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873603655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:44,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:44,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:59:44,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89318897] [2022-03-01 17:59:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:44,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:44,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:44,387 INFO L87 Difference]: Start difference. First operand 8634 states and 38422 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:47,730 INFO L93 Difference]: Finished difference Result 12179 states and 51762 transitions. [2022-03-01 17:59:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 17:59:47,730 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:47,764 INFO L225 Difference]: With dead ends: 12179 [2022-03-01 17:59:47,764 INFO L226 Difference]: Without dead ends: 12098 [2022-03-01 17:59:47,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 45 SyntacticMatches, 18 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1029, Invalid=7161, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 17:59:47,766 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 804 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 5218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2413 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:47,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 389 Invalid, 5218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2490 Invalid, 0 Unknown, 2413 Unchecked, 1.1s Time] [2022-03-01 17:59:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12098 states. [2022-03-01 17:59:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12098 to 8694. [2022-03-01 17:59:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8694 states, 8693 states have (on average 4.447831588634534) internal successors, (38665), 8693 states have internal predecessors, (38665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8694 states to 8694 states and 38665 transitions. [2022-03-01 17:59:48,048 INFO L78 Accepts]: Start accepts. Automaton has 8694 states and 38665 transitions. Word has length 30 [2022-03-01 17:59:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:48,048 INFO L470 AbstractCegarLoop]: Abstraction has 8694 states and 38665 transitions. [2022-03-01 17:59:48,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8694 states and 38665 transitions. [2022-03-01 17:59:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:48,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:48,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:48,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:48,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-01 17:59:48,278 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 66531679, now seen corresponding path program 7 times [2022-03-01 17:59:48,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:48,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452472491] [2022-03-01 17:59:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:48,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:48,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452472491] [2022-03-01 17:59:48,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452472491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:48,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930029610] [2022-03-01 17:59:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:48,464 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-01 17:59:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:48,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:48,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:48,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:59:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:48,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:48,974 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:48,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 17:59:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:49,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:49,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:49,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 17:59:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:49,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930029610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:49,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:49,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 17:59:49,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197110670] [2022-03-01 17:59:49,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:49,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:59:49,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:59:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:59:49,029 INFO L87 Difference]: Start difference. First operand 8694 states and 38665 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:50,203 INFO L93 Difference]: Finished difference Result 9697 states and 42531 transitions. [2022-03-01 17:59:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:50,229 INFO L225 Difference]: With dead ends: 9697 [2022-03-01 17:59:50,229 INFO L226 Difference]: Without dead ends: 9647 [2022-03-01 17:59:50,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:50,229 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 254 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:50,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 198 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2080 Invalid, 0 Unknown, 680 Unchecked, 0.8s Time] [2022-03-01 17:59:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2022-03-01 17:59:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 8659. [2022-03-01 17:59:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 8658 states have (on average 4.45045045045045) internal successors, (38532), 8658 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 38532 transitions. [2022-03-01 17:59:50,395 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 38532 transitions. Word has length 30 [2022-03-01 17:59:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:50,395 INFO L470 AbstractCegarLoop]: Abstraction has 8659 states and 38532 transitions. [2022-03-01 17:59:50,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 38532 transitions. [2022-03-01 17:59:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:50,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:50,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:50,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:50,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-01 17:59:50,619 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1006138418, now seen corresponding path program 6 times [2022-03-01 17:59:50,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:50,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832403187] [2022-03-01 17:59:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:50,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:50,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832403187] [2022-03-01 17:59:50,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832403187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:50,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047232907] [2022-03-01 17:59:50,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:50,883 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:50,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-01 17:59:50,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:59:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:51,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:51,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-03-01 17:59:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:51,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:52,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:52,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:52,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:52,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-01 17:59:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:52,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047232907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:52,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:52,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-01 17:59:52,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593188092] [2022-03-01 17:59:52,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:59:52,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:59:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:59:52,330 INFO L87 Difference]: Start difference. First operand 8659 states and 38532 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:54,728 INFO L93 Difference]: Finished difference Result 10661 states and 45939 transitions. [2022-03-01 17:59:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:59:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:54,756 INFO L225 Difference]: With dead ends: 10661 [2022-03-01 17:59:54,756 INFO L226 Difference]: Without dead ends: 10563 [2022-03-01 17:59:54,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=3683, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:59:54,757 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 4290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1853 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:54,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 374 Invalid, 4290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2350 Invalid, 0 Unknown, 1853 Unchecked, 0.9s Time] [2022-03-01 17:59:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10563 states. [2022-03-01 17:59:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10563 to 8665. [2022-03-01 17:59:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8665 states, 8664 states have (on average 4.448868882733149) internal successors, (38545), 8664 states have internal predecessors, (38545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8665 states to 8665 states and 38545 transitions. [2022-03-01 17:59:54,983 INFO L78 Accepts]: Start accepts. Automaton has 8665 states and 38545 transitions. Word has length 30 [2022-03-01 17:59:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:54,983 INFO L470 AbstractCegarLoop]: Abstraction has 8665 states and 38545 transitions. [2022-03-01 17:59:54,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8665 states and 38545 transitions. [2022-03-01 17:59:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:54,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:54,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:55,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:55,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:55,215 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash -570301937, now seen corresponding path program 8 times [2022-03-01 17:59:55,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:55,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747085123] [2022-03-01 17:59:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:55,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:55,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747085123] [2022-03-01 17:59:55,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747085123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:55,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141075759] [2022-03-01 17:59:55,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:55,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:55,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:55,393 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:55,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-01 17:59:55,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:55,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:55,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 17:59:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:55,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:56,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 17:59:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:56,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141075759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:56,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:56,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:59:56,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370420494] [2022-03-01 17:59:56,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:56,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:56,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:56,255 INFO L87 Difference]: Start difference. First operand 8665 states and 38545 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:58,610 INFO L93 Difference]: Finished difference Result 11559 states and 49490 transitions. [2022-03-01 17:59:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:59:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:59:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:58,642 INFO L225 Difference]: With dead ends: 11559 [2022-03-01 17:59:58,642 INFO L226 Difference]: Without dead ends: 11539 [2022-03-01 17:59:58,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=533, Invalid=4297, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:59:58,643 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 426 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 4236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:58,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 364 Invalid, 4236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2636 Invalid, 0 Unknown, 1502 Unchecked, 0.9s Time] [2022-03-01 17:59:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11539 states. [2022-03-01 17:59:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11539 to 8824. [2022-03-01 17:59:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 8823 states have (on average 4.440213079451434) internal successors, (39176), 8823 states have internal predecessors, (39176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 39176 transitions. [2022-03-01 17:59:58,861 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 39176 transitions. Word has length 30 [2022-03-01 17:59:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:58,861 INFO L470 AbstractCegarLoop]: Abstraction has 8824 states and 39176 transitions. [2022-03-01 17:59:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 39176 transitions. [2022-03-01 17:59:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:59:58,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:58,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:58,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-03-01 17:59:59,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:59,093 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -541672786, now seen corresponding path program 2 times [2022-03-01 17:59:59,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:59,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628727370] [2022-03-01 17:59:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:59,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:59,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628727370] [2022-03-01 17:59:59,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628727370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:59,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610325644] [2022-03-01 17:59:59,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:59,313 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:59,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-01 17:59:59,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:59,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:59,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-01 17:59:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:59,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:00,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 18:00:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:00,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610325644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:00,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:00,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 18:00:00,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119716809] [2022-03-01 18:00:00,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:00,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:00:00,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:00:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:00:00,212 INFO L87 Difference]: Start difference. First operand 8824 states and 39176 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:03,301 INFO L93 Difference]: Finished difference Result 11479 states and 48918 transitions. [2022-03-01 18:00:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:00:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:03,332 INFO L225 Difference]: With dead ends: 11479 [2022-03-01 18:00:03,332 INFO L226 Difference]: Without dead ends: 11303 [2022-03-01 18:00:03,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=517, Invalid=4595, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:00:03,332 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 530 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 6363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3233 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:03,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 439 Invalid, 6363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3001 Invalid, 0 Unknown, 3233 Unchecked, 1.3s Time] [2022-03-01 18:00:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2022-03-01 18:00:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8770. [2022-03-01 18:00:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 4.43790626069107) internal successors, (38916), 8769 states have internal predecessors, (38916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 38916 transitions. [2022-03-01 18:00:03,537 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 38916 transitions. Word has length 30 [2022-03-01 18:00:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:03,537 INFO L470 AbstractCegarLoop]: Abstraction has 8770 states and 38916 transitions. [2022-03-01 18:00:03,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 38916 transitions. [2022-03-01 18:00:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:03,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:03,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:03,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:03,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:03,770 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 603871680, now seen corresponding path program 3 times [2022-03-01 18:00:03,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:03,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915659625] [2022-03-01 18:00:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:03,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:03,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915659625] [2022-03-01 18:00:03,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915659625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:03,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799858902] [2022-03-01 18:00:03,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:03,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:03,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:03,966 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:03,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-01 18:00:03,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:00:03,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:03,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:03,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:04,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-01 18:00:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:04,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 18:00:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:04,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799858902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:04,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:04,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 18:00:04,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686515254] [2022-03-01 18:00:04,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:04,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:00:04,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:00:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:00:04,940 INFO L87 Difference]: Start difference. First operand 8770 states and 38916 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:07,839 INFO L93 Difference]: Finished difference Result 11284 states and 48184 transitions. [2022-03-01 18:00:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:00:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:07,879 INFO L225 Difference]: With dead ends: 11284 [2022-03-01 18:00:07,879 INFO L226 Difference]: Without dead ends: 11222 [2022-03-01 18:00:07,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=3942, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:00:07,880 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 478 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 4526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2630 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:07,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 336 Invalid, 4526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1782 Invalid, 0 Unknown, 2630 Unchecked, 1.0s Time] [2022-03-01 18:00:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11222 states. [2022-03-01 18:00:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11222 to 8763. [2022-03-01 18:00:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 4.439055010271628) internal successors, (38895), 8762 states have internal predecessors, (38895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 38895 transitions. [2022-03-01 18:00:08,146 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 38895 transitions. Word has length 30 [2022-03-01 18:00:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:08,146 INFO L470 AbstractCegarLoop]: Abstraction has 8763 states and 38895 transitions. [2022-03-01 18:00:08,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 38895 transitions. [2022-03-01 18:00:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:08,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:08,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:08,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-01 18:00:08,383 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash -567527281, now seen corresponding path program 9 times [2022-03-01 18:00:08,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:08,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708177366] [2022-03-01 18:00:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:08,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:08,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:08,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708177366] [2022-03-01 18:00:08,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708177366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:08,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018642399] [2022-03-01 18:00:08,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:08,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:08,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:08,593 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:08,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-01 18:00:08,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:00:08,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:08,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:08,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-01 18:00:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:09,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:09,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-03-01 18:00:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:09,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018642399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:09,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:09,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 18:00:09,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519754302] [2022-03-01 18:00:09,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:09,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:09,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:09,728 INFO L87 Difference]: Start difference. First operand 8763 states and 38895 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:12,736 INFO L93 Difference]: Finished difference Result 12191 states and 51745 transitions. [2022-03-01 18:00:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:00:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:12,770 INFO L225 Difference]: With dead ends: 12191 [2022-03-01 18:00:12,771 INFO L226 Difference]: Without dead ends: 12017 [2022-03-01 18:00:12,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:00:12,771 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 464 mSDsluCounter, 2600 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 5336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2355 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:12,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 430 Invalid, 5336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2830 Invalid, 0 Unknown, 2355 Unchecked, 1.4s Time] [2022-03-01 18:00:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12017 states. [2022-03-01 18:00:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12017 to 8766. [2022-03-01 18:00:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8766 states, 8765 states have (on average 4.4410724472333145) internal successors, (38926), 8765 states have internal predecessors, (38926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8766 states to 8766 states and 38926 transitions. [2022-03-01 18:00:12,989 INFO L78 Accepts]: Start accepts. Automaton has 8766 states and 38926 transitions. Word has length 30 [2022-03-01 18:00:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:12,989 INFO L470 AbstractCegarLoop]: Abstraction has 8766 states and 38926 transitions. [2022-03-01 18:00:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8766 states and 38926 transitions. [2022-03-01 18:00:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:13,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:13,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:13,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-03-01 18:00:13,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-01 18:00:13,226 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1073873547, now seen corresponding path program 10 times [2022-03-01 18:00:13,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:13,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225694633] [2022-03-01 18:00:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:13,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:13,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225694633] [2022-03-01 18:00:13,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225694633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:13,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860489926] [2022-03-01 18:00:13,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:13,412 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:13,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-01 18:00:13,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:13,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:13,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:00:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:13,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:14,125 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:14,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:14,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:14,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860489926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:14,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:14,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 18:00:14,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545226531] [2022-03-01 18:00:14,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:14,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:14,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:14,211 INFO L87 Difference]: Start difference. First operand 8766 states and 38926 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:15,370 INFO L93 Difference]: Finished difference Result 9343 states and 41180 transitions. [2022-03-01 18:00:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:00:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:15,396 INFO L225 Difference]: With dead ends: 9343 [2022-03-01 18:00:15,396 INFO L226 Difference]: Without dead ends: 9316 [2022-03-01 18:00:15,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:00:15,396 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:15,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 195 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1839 Invalid, 0 Unknown, 258 Unchecked, 0.8s Time] [2022-03-01 18:00:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2022-03-01 18:00:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8752. [2022-03-01 18:00:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 4.442235173123072) internal successors, (38874), 8751 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 38874 transitions. [2022-03-01 18:00:15,561 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 38874 transitions. Word has length 30 [2022-03-01 18:00:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:15,561 INFO L470 AbstractCegarLoop]: Abstraction has 8752 states and 38874 transitions. [2022-03-01 18:00:15,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 38874 transitions. [2022-03-01 18:00:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:15,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:15,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:15,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:15,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-01 18:00:15,781 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2072652385, now seen corresponding path program 7 times [2022-03-01 18:00:15,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:15,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102711277] [2022-03-01 18:00:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:16,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:16,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102711277] [2022-03-01 18:00:16,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102711277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:16,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376687687] [2022-03-01 18:00:16,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:16,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:16,048 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:16,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-01 18:00:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:16,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 18:00:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:16,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:16,793 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:16,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:16,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:16,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:16,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:16,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:16,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376687687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:16,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:16,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-01 18:00:16,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454019966] [2022-03-01 18:00:16,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:16,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:00:16,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:00:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:00:16,871 INFO L87 Difference]: Start difference. First operand 8752 states and 38874 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:17,970 INFO L93 Difference]: Finished difference Result 9172 states and 40505 transitions. [2022-03-01 18:00:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:00:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:18,001 INFO L225 Difference]: With dead ends: 9172 [2022-03-01 18:00:18,001 INFO L226 Difference]: Without dead ends: 9127 [2022-03-01 18:00:18,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:18,001 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 129 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1872 Invalid, 0 Unknown, 90 Unchecked, 0.8s Time] [2022-03-01 18:00:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9127 states. [2022-03-01 18:00:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9127 to 8755. [2022-03-01 18:00:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8755 states, 8754 states have (on average 4.441740918437286) internal successors, (38883), 8754 states have internal predecessors, (38883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8755 states to 8755 states and 38883 transitions. [2022-03-01 18:00:18,217 INFO L78 Accepts]: Start accepts. Automaton has 8755 states and 38883 transitions. Word has length 30 [2022-03-01 18:00:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:18,217 INFO L470 AbstractCegarLoop]: Abstraction has 8755 states and 38883 transitions. [2022-03-01 18:00:18,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8755 states and 38883 transitions. [2022-03-01 18:00:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:18,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:18,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:18,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-03-01 18:00:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-01 18:00:18,448 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1825043014, now seen corresponding path program 37 times [2022-03-01 18:00:18,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:18,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142203851] [2022-03-01 18:00:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:18,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:18,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:18,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142203851] [2022-03-01 18:00:18,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142203851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:18,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823005091] [2022-03-01 18:00:18,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:18,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:18,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:18,723 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:18,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-01 18:00:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:19,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:19,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 18:00:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:19,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:19,489 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:19,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:19,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:19,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823005091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:19,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:19,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 18:00:19,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732305260] [2022-03-01 18:00:19,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:19,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:00:19,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:00:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:00:19,582 INFO L87 Difference]: Start difference. First operand 8755 states and 38883 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:20,788 INFO L93 Difference]: Finished difference Result 9307 states and 41037 transitions. [2022-03-01 18:00:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:00:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:20,823 INFO L225 Difference]: With dead ends: 9307 [2022-03-01 18:00:20,823 INFO L226 Difference]: Without dead ends: 9232 [2022-03-01 18:00:20,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:20,824 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:20,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 129 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1335 Invalid, 0 Unknown, 381 Unchecked, 0.7s Time] [2022-03-01 18:00:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2022-03-01 18:00:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 8773. [2022-03-01 18:00:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8773 states, 8772 states have (on average 4.441062471500228) internal successors, (38957), 8772 states have internal predecessors, (38957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8773 states to 8773 states and 38957 transitions. [2022-03-01 18:00:21,066 INFO L78 Accepts]: Start accepts. Automaton has 8773 states and 38957 transitions. Word has length 30 [2022-03-01 18:00:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:21,066 INFO L470 AbstractCegarLoop]: Abstraction has 8773 states and 38957 transitions. [2022-03-01 18:00:21,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8773 states and 38957 transitions. [2022-03-01 18:00:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:21,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:21,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:21,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:21,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-03-01 18:00:21,311 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2061595834, now seen corresponding path program 38 times [2022-03-01 18:00:21,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:21,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133506592] [2022-03-01 18:00:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:21,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:21,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133506592] [2022-03-01 18:00:21,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133506592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:21,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508988901] [2022-03-01 18:00:21,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:21,584 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:21,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-01 18:00:21,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:22,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:22,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-01 18:00:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:22,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:22,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:22,639 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 18:00:22,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 18:00:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:22,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508988901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:22,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:22,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 18:00:22,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806765116] [2022-03-01 18:00:22,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:22,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:22,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:22,789 INFO L87 Difference]: Start difference. First operand 8773 states and 38957 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:24,242 INFO L93 Difference]: Finished difference Result 9427 states and 41519 transitions. [2022-03-01 18:00:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:00:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:24,276 INFO L225 Difference]: With dead ends: 9427 [2022-03-01 18:00:24,276 INFO L226 Difference]: Without dead ends: 9362 [2022-03-01 18:00:24,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:00:24,277 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:24,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 138 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1801 Invalid, 0 Unknown, 650 Unchecked, 0.9s Time] [2022-03-01 18:00:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2022-03-01 18:00:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 8807. [2022-03-01 18:00:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 4.437883261412673) internal successors, (39080), 8806 states have internal predecessors, (39080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 39080 transitions. [2022-03-01 18:00:24,496 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 39080 transitions. Word has length 30 [2022-03-01 18:00:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 39080 transitions. [2022-03-01 18:00:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 39080 transitions. [2022-03-01 18:00:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:24,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:24,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:24,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-03-01 18:00:24,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:24,731 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1240699496, now seen corresponding path program 39 times [2022-03-01 18:00:24,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:24,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843448879] [2022-03-01 18:00:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:24,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:24,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843448879] [2022-03-01 18:00:24,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843448879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:24,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053969559] [2022-03-01 18:00:24,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:24,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:24,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:24,960 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:24,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-01 18:00:24,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:00:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:25,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 18:00:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:25,728 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 18:00:25,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 18:00:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:25,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053969559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:25,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:25,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:00:25,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995931845] [2022-03-01 18:00:25,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:25,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:00:25,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:00:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:00:25,836 INFO L87 Difference]: Start difference. First operand 8807 states and 39080 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:27,261 INFO L93 Difference]: Finished difference Result 9097 states and 40106 transitions. [2022-03-01 18:00:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:00:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:27,286 INFO L225 Difference]: With dead ends: 9097 [2022-03-01 18:00:27,286 INFO L226 Difference]: Without dead ends: 9048 [2022-03-01 18:00:27,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:00:27,286 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:27,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 141 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1875 Invalid, 0 Unknown, 380 Unchecked, 0.8s Time] [2022-03-01 18:00:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2022-03-01 18:00:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 8805. [2022-03-01 18:00:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 8804 states have (on average 4.4379827351204) internal successors, (39072), 8804 states have internal predecessors, (39072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 39072 transitions. [2022-03-01 18:00:27,496 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 39072 transitions. Word has length 30 [2022-03-01 18:00:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:27,496 INFO L470 AbstractCegarLoop]: Abstraction has 8805 states and 39072 transitions. [2022-03-01 18:00:27,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 39072 transitions. [2022-03-01 18:00:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:27,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:27,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:27,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:27,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:27,728 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1307452366, now seen corresponding path program 40 times [2022-03-01 18:00:27,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:27,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592471860] [2022-03-01 18:00:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:27,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:27,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592471860] [2022-03-01 18:00:27,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592471860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:27,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279737786] [2022-03-01 18:00:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:27,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:27,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:27,984 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-01 18:00:28,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:28,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 18:00:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:28,568 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:28,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:28,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:28,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:28,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279737786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:28,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:28,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:00:28,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081281998] [2022-03-01 18:00:28,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:28,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:28,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:28,636 INFO L87 Difference]: Start difference. First operand 8805 states and 39072 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:29,943 INFO L93 Difference]: Finished difference Result 9200 states and 40559 transitions. [2022-03-01 18:00:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:00:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:29,968 INFO L225 Difference]: With dead ends: 9200 [2022-03-01 18:00:29,968 INFO L226 Difference]: Without dead ends: 9158 [2022-03-01 18:00:29,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:29,969 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 157 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2312 Invalid, 0 Unknown, 512 Unchecked, 0.9s Time] [2022-03-01 18:00:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2022-03-01 18:00:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 8811. [2022-03-01 18:00:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.438138479001135) internal successors, (39100), 8810 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 39100 transitions. [2022-03-01 18:00:30,148 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 39100 transitions. Word has length 30 [2022-03-01 18:00:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:30,148 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 39100 transitions. [2022-03-01 18:00:30,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 39100 transitions. [2022-03-01 18:00:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:30,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:30,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:30,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:30,372 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 46749460, now seen corresponding path program 41 times [2022-03-01 18:00:30,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:30,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4274136] [2022-03-01 18:00:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:30,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:30,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4274136] [2022-03-01 18:00:30,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4274136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:30,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979344070] [2022-03-01 18:00:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:30,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:30,584 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:30,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-01 18:00:30,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:00:30,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:30,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:00:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:30,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:31,207 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:31,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:31,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:31,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:31,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:31,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979344070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:31,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:31,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 18:00:31,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752741551] [2022-03-01 18:00:31,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:31,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:31,299 INFO L87 Difference]: Start difference. First operand 8811 states and 39100 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:32,279 INFO L93 Difference]: Finished difference Result 9349 states and 41187 transitions. [2022-03-01 18:00:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:00:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:32,305 INFO L225 Difference]: With dead ends: 9349 [2022-03-01 18:00:32,305 INFO L226 Difference]: Without dead ends: 9304 [2022-03-01 18:00:32,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:00:32,306 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 220 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:32,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 153 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1478 Invalid, 0 Unknown, 532 Unchecked, 0.6s Time] [2022-03-01 18:00:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2022-03-01 18:00:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 8797. [2022-03-01 18:00:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8797 states, 8796 states have (on average 4.438949522510232) internal successors, (39045), 8796 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8797 states to 8797 states and 39045 transitions. [2022-03-01 18:00:32,486 INFO L78 Accepts]: Start accepts. Automaton has 8797 states and 39045 transitions. Word has length 30 [2022-03-01 18:00:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:32,486 INFO L470 AbstractCegarLoop]: Abstraction has 8797 states and 39045 transitions. [2022-03-01 18:00:32,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8797 states and 39045 transitions. [2022-03-01 18:00:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:32,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:32,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:32,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-03-01 18:00:32,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:32,719 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -869005214, now seen corresponding path program 7 times [2022-03-01 18:00:32,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:32,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812315471] [2022-03-01 18:00:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:32,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:32,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812315471] [2022-03-01 18:00:32,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812315471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:32,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796290956] [2022-03-01 18:00:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:32,934 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:32,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-01 18:00:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:32,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:33,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:33,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:33,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:33,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 18:00:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:33,463 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:33,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:33,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:33,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:33,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:33,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796290956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:33,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:33,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-01 18:00:33,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105132481] [2022-03-01 18:00:33,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:33,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:00:33,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:00:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:00:33,518 INFO L87 Difference]: Start difference. First operand 8797 states and 39045 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:34,439 INFO L93 Difference]: Finished difference Result 9243 states and 40793 transitions. [2022-03-01 18:00:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:00:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:34,466 INFO L225 Difference]: With dead ends: 9243 [2022-03-01 18:00:34,466 INFO L226 Difference]: Without dead ends: 9196 [2022-03-01 18:00:34,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:34,467 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:34,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 122 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1769 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-03-01 18:00:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2022-03-01 18:00:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 8804. [2022-03-01 18:00:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 8803 states have (on average 4.438941270021584) internal successors, (39076), 8803 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 39076 transitions. [2022-03-01 18:00:34,677 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 39076 transitions. Word has length 30 [2022-03-01 18:00:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:34,677 INFO L470 AbstractCegarLoop]: Abstraction has 8804 states and 39076 transitions. [2022-03-01 18:00:34,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 39076 transitions. [2022-03-01 18:00:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:34,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:34,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:34,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:34,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:34,910 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1116614585, now seen corresponding path program 11 times [2022-03-01 18:00:34,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:34,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100415373] [2022-03-01 18:00:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:35,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:35,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100415373] [2022-03-01 18:00:35,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100415373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:35,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847925937] [2022-03-01 18:00:35,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:35,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:35,168 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:35,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-01 18:00:35,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:35,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:00:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:35,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-01 18:00:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:35,832 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:35,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:35,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:35,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:35,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847925937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:35,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:35,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 18:00:35,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108498020] [2022-03-01 18:00:35,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:35,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:00:35,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:00:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:00:35,917 INFO L87 Difference]: Start difference. First operand 8804 states and 39076 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:37,071 INFO L93 Difference]: Finished difference Result 9412 states and 41423 transitions. [2022-03-01 18:00:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:00:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:37,098 INFO L225 Difference]: With dead ends: 9412 [2022-03-01 18:00:37,098 INFO L226 Difference]: Without dead ends: 9337 [2022-03-01 18:00:37,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:37,099 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:37,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 127 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1781 Invalid, 0 Unknown, 199 Unchecked, 0.8s Time] [2022-03-01 18:00:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9337 states. [2022-03-01 18:00:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9337 to 8803. [2022-03-01 18:00:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8803 states, 8802 states have (on average 4.438650306748467) internal successors, (39069), 8802 states have internal predecessors, (39069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8803 states to 8803 states and 39069 transitions. [2022-03-01 18:00:37,269 INFO L78 Accepts]: Start accepts. Automaton has 8803 states and 39069 transitions. Word has length 30 [2022-03-01 18:00:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 8803 states and 39069 transitions. [2022-03-01 18:00:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8803 states and 39069 transitions. [2022-03-01 18:00:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:37,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:37,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:37,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:37,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:37,502 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -708286137, now seen corresponding path program 12 times [2022-03-01 18:00:37,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:37,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249152879] [2022-03-01 18:00:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:37,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:37,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:37,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249152879] [2022-03-01 18:00:37,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249152879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:37,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979700252] [2022-03-01 18:00:37,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:37,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:37,727 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:37,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-01 18:00:37,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:00:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:38,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:38,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:38,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-01 18:00:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:38,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:38,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:38,638 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 18:00:38,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 18:00:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:38,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979700252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:38,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:38,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-03-01 18:00:38,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393211604] [2022-03-01 18:00:38,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:38,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:38,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:38,772 INFO L87 Difference]: Start difference. First operand 8803 states and 39069 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:40,109 INFO L93 Difference]: Finished difference Result 9321 states and 41081 transitions. [2022-03-01 18:00:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:00:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:40,143 INFO L225 Difference]: With dead ends: 9321 [2022-03-01 18:00:40,144 INFO L226 Difference]: Without dead ends: 9283 [2022-03-01 18:00:40,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:00:40,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:40,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 143 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1841 Invalid, 0 Unknown, 505 Unchecked, 0.8s Time] [2022-03-01 18:00:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2022-03-01 18:00:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 8801. [2022-03-01 18:00:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8801 states, 8800 states have (on average 4.43875) internal successors, (39061), 8800 states have internal predecessors, (39061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8801 states to 8801 states and 39061 transitions. [2022-03-01 18:00:40,389 INFO L78 Accepts]: Start accepts. Automaton has 8801 states and 39061 transitions. Word has length 30 [2022-03-01 18:00:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:40,389 INFO L470 AbstractCegarLoop]: Abstraction has 8801 states and 39061 transitions. [2022-03-01 18:00:40,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8801 states and 39061 transitions. [2022-03-01 18:00:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:40,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:40,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:40,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:40,634 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1400059157, now seen corresponding path program 13 times [2022-03-01 18:00:40,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:40,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641215463] [2022-03-01 18:00:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:40,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:40,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641215463] [2022-03-01 18:00:40,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641215463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:40,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826553853] [2022-03-01 18:00:40,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:40,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:40,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:40,904 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:40,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-01 18:00:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:41,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:41,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:41,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:00:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:41,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:41,760 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:41,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-03-01 18:00:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:41,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:41,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-03-01 18:00:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:41,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826553853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:41,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:41,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 18:00:41,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474748848] [2022-03-01 18:00:41,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:41,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:41,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:41,857 INFO L87 Difference]: Start difference. First operand 8801 states and 39061 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:43,359 INFO L93 Difference]: Finished difference Result 9388 states and 41343 transitions. [2022-03-01 18:00:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:00:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:43,393 INFO L225 Difference]: With dead ends: 9388 [2022-03-01 18:00:43,393 INFO L226 Difference]: Without dead ends: 9345 [2022-03-01 18:00:43,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:00:43,393 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 196 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:43,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 174 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2182 Invalid, 0 Unknown, 396 Unchecked, 1.1s Time] [2022-03-01 18:00:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2022-03-01 18:00:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 8789. [2022-03-01 18:00:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 4.439462903959946) internal successors, (39014), 8788 states have internal predecessors, (39014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 39014 transitions. [2022-03-01 18:00:43,646 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 39014 transitions. Word has length 30 [2022-03-01 18:00:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:43,646 INFO L470 AbstractCegarLoop]: Abstraction has 8789 states and 39014 transitions. [2022-03-01 18:00:43,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 39014 transitions. [2022-03-01 18:00:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:43,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:43,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:43,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:43,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-01 18:00:43,887 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 973328899, now seen corresponding path program 8 times [2022-03-01 18:00:43,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:43,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587177805] [2022-03-01 18:00:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:44,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:44,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587177805] [2022-03-01 18:00:44,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587177805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:44,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239980562] [2022-03-01 18:00:44,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:44,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:44,199 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:44,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-01 18:00:44,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:44,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:44,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 18:00:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:45,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:45,233 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 18:00:45,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 18:00:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:45,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239980562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:45,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:45,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:45,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630441229] [2022-03-01 18:00:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:45,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:45,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:45,432 INFO L87 Difference]: Start difference. First operand 8789 states and 39014 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:47,407 INFO L93 Difference]: Finished difference Result 9247 states and 40785 transitions. [2022-03-01 18:00:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:00:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:47,441 INFO L225 Difference]: With dead ends: 9247 [2022-03-01 18:00:47,442 INFO L226 Difference]: Without dead ends: 9214 [2022-03-01 18:00:47,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:00:47,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:47,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 132 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1761 Invalid, 0 Unknown, 849 Unchecked, 1.0s Time] [2022-03-01 18:00:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2022-03-01 18:00:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8830. [2022-03-01 18:00:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 4.436176237399479) internal successors, (39167), 8829 states have internal predecessors, (39167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39167 transitions. [2022-03-01 18:00:47,719 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39167 transitions. Word has length 30 [2022-03-01 18:00:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:47,719 INFO L470 AbstractCegarLoop]: Abstraction has 8830 states and 39167 transitions. [2022-03-01 18:00:47,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39167 transitions. [2022-03-01 18:00:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:47,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:47,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:47,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-03-01 18:00:47,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-01 18:00:47,964 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1860832580, now seen corresponding path program 8 times [2022-03-01 18:00:47,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:47,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500203093] [2022-03-01 18:00:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:48,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:48,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500203093] [2022-03-01 18:00:48,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500203093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:48,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706183192] [2022-03-01 18:00:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:48,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:48,272 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:48,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-01 18:00:48,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:48,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:48,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:48,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:48,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-01 18:00:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:48,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:49,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:49,318 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-03-01 18:00:49,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-03-01 18:00:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:49,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706183192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:49,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:49,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:49,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302115648] [2022-03-01 18:00:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:49,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:49,533 INFO L87 Difference]: Start difference. First operand 8830 states and 39167 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:51,737 INFO L93 Difference]: Finished difference Result 9309 states and 41003 transitions. [2022-03-01 18:00:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:00:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:00:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:51,770 INFO L225 Difference]: With dead ends: 9309 [2022-03-01 18:00:51,770 INFO L226 Difference]: Without dead ends: 9228 [2022-03-01 18:00:51,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:00:51,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:51,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 158 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2024 Invalid, 0 Unknown, 786 Unchecked, 1.1s Time] [2022-03-01 18:00:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2022-03-01 18:00:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 8781. [2022-03-01 18:00:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 4.438610478359909) internal successors, (38971), 8780 states have internal predecessors, (38971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 38971 transitions. [2022-03-01 18:00:52,085 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 38971 transitions. Word has length 30 [2022-03-01 18:00:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:52,086 INFO L470 AbstractCegarLoop]: Abstraction has 8781 states and 38971 transitions. [2022-03-01 18:00:52,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 38971 transitions. [2022-03-01 18:00:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:00:52,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:52,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:52,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:52,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-01 18:00:52,330 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 484389789, now seen corresponding path program 9 times [2022-03-01 18:00:52,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:52,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66369916] [2022-03-01 18:00:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:52,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:52,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:52,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66369916] [2022-03-01 18:00:52,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66369916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:52,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924318590] [2022-03-01 18:00:52,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:52,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:52,636 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:52,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-01 18:00:52,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:00:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:53,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:53,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-03-01 18:00:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:53,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:53,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-03-01 18:00:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924318590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:53,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:53,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 18:00:53,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314234166] [2022-03-01 18:00:53,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:53,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:00:53,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:00:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:53,980 INFO L87 Difference]: Start difference. First operand 8781 states and 38971 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 18:00:58,062 WARN L244 SmtUtils]: Removed 7 from assertion stack [2022-03-01 18:00:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:00:58,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=866, Invalid=5614, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:00:58,063 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 346 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2315 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:58,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 111 Invalid, 4799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2355 Invalid, 0 Unknown, 2315 Unchecked, 1.0s Time] [2022-03-01 18:00:58,064 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-03-01 18:00:58,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-03-01 18:00:58,089 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:00:58,089 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:00:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:58,276 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. [2022-03-01 18:00:58,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err8INUSE_VIOLATION (9 of 11 remaining) [2022-03-01 18:00:58,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err9INUSE_VIOLATION (8 of 11 remaining) [2022-03-01 18:00:58,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (7 of 11 remaining) [2022-03-01 18:00:58,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (6 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err3INUSE_VIOLATION (4 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err6INUSE_VIOLATION (3 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err7INUSE_VIOLATION (2 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork1Err4INUSE_VIOLATION (1 of 11 remaining) [2022-03-01 18:00:58,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork1Err5INUSE_VIOLATION (0 of 11 remaining) [2022-03-01 18:00:58,290 INFO L732 BasicCegarLoop]: Path program histogram: [85, 50, 41, 32, 29, 20, 13, 9, 8, 8, 8, 7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:58,292 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:00:58,293 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:00:58,295 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:00:58 BasicIcfg [2022-03-01 18:00:58,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:00:58,295 INFO L158 Benchmark]: Toolchain (without parser) took 907060.44ms. Allocated memory was 195.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 160.0MB in the beginning and 865.0MB in the end (delta: -704.9MB). Peak memory consumption was 210.1MB. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 195.0MB. Free memory was 161.3MB in the beginning and 161.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.64ms. Allocated memory is still 195.0MB. Free memory was 159.9MB in the beginning and 158.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L158 Benchmark]: Boogie Preprocessor took 21.31ms. Allocated memory is still 195.0MB. Free memory was 158.5MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L158 Benchmark]: RCFGBuilder took 335.75ms. Allocated memory is still 195.0MB. Free memory was 157.4MB in the beginning and 146.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L158 Benchmark]: TraceAbstraction took 906679.82ms. Allocated memory was 195.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 145.9MB in the beginning and 865.0MB in the end (delta: -719.1MB). Peak memory consumption was 195.4MB. Max. memory is 8.0GB. [2022-03-01 18:00:58,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 195.0MB. Free memory was 161.3MB in the beginning and 161.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.64ms. Allocated memory is still 195.0MB. Free memory was 159.9MB in the beginning and 158.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.31ms. Allocated memory is still 195.0MB. Free memory was 158.5MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 335.75ms. Allocated memory is still 195.0MB. Free memory was 157.4MB in the beginning and 146.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 906679.82ms. Allocated memory was 195.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 145.9MB in the beginning and 865.0MB in the end (delta: -719.1MB). Peak memory consumption was 195.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8781states) and FLOYD_HOARE automaton (currently 66 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 36 for 10ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 906.5s, OverallIterations: 358, TraceHistogramMax: 2, PathProgramHistogramMax: 85, EmptinessCheckTime: 3.1s, AutomataDifference: 511.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 108297 SdHoareTripleChecker+Valid, 230.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108297 mSDsluCounter, 62187 SdHoareTripleChecker+Invalid, 195.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 214673 IncrementalHoareTripleChecker+Unchecked, 414596 mSDsCounter, 32374 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 610660 IncrementalHoareTripleChecker+Invalid, 857707 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32374 mSolverCounterUnsat, 6145 mSDtfsCounter, 610660 mSolverCounterSat, 1.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31213 GetRequests, 14601 SyntacticMatches, 1815 SemanticMatches, 14796 ConstructedPredicates, 0 IntricatePredicates, 18 DeprecatedPredicates, 234557 ImplicationChecksByTransitivity, 376.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8830occurred in iteration=356, InterpolantAutomatonStates: 11883, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 33.5s AutomataMinimizationTime, 357 MinimizatonAttempts, 437667 StatesRemovedByMinimization, 354 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 268.8s InterpolantComputationTime, 19936 NumberOfCodeBlocks, 19936 NumberOfCodeBlocksAsserted, 1040 NumberOfCheckSat, 28732 ConstructedInterpolants, 2324 QuantifiedInterpolants, 409710 SizeOfPredicates, 3127 NumberOfNonLiveVariables, 43175 ConjunctsInSsa, 8999 ConjunctsInUnsatCore, 1054 InterpolantComputations, 10 PerfectInterpolantSequences, 240/4379 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown