/usr/bin/java -Xmx16000000000 -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-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:25:59,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:25:59,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:25:59,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:25:59,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:25:59,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:25:59,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:25:59,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:25:59,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:25:59,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:25:59,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:25:59,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 05:25:59,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 05:25:59,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 05:25:59,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 05:25:59,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 05:25:59,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 05:25:59,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 05:25:59,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 05:25:59,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 05:25:59,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 05:25:59,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 05:25:59,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 05:25:59,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 05:25:59,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 05:25:59,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 05:25:59,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 05:25:59,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 05:25:59,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 05:25:59,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 05:25:59,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 05:25:59,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 05:25:59,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 05:25:59,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 05:25:59,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 05:25:59,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 05:25:59,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 05:25:59,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 05:25:59,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:25:59,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:25:59,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:25:59,586 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 [2022-01-18 05:25:59,615 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:25:59,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:25:59,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:25:59,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:25:59,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:25:59,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:25:59,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:25:59,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:25:59,617 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:25:59,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:25:59,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:25:59,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:25:59,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:25:59,619 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:25:59,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:25:59,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:25:59,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:25:59,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:25:59,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:25:59,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:25:59,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:25:59,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:25:59,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:25:59,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:25:59,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:25:59,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:25:59,880 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:25:59,881 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:25:59,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2022-01-18 05:25:59,882 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2022-01-18 05:25:59,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:25:59,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:25:59,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:25:59,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:25:59,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:25:59,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,946 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:25:59,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:25:59,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:25:59,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:25:59,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:25:59,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:25:59,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:25:59,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:25:59,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:25:59,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/1) ... [2022-01-18 05:25:59,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:26:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:00,014 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) [2022-01-18 05:26:00,020 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 [2022-01-18 05:26:00,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:26:00,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:26:00,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:26:00,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:26:00,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:26:00,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:26:00,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:26:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:26:00,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:26:00,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:26:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:26:00,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:26:00,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 05:26:00,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 05:26:00,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 05:26:00,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 05:26:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 05:26:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 05:26:00,046 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-01-18 05:26:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-01-18 05:26:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-01-18 05:26:00,047 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:26:00,088 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:26:00,090 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:26:00,247 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:26:00,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:26:00,268 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-18 05:26:00,268 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 05:26:00,268 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 05:26:00,269 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-01-18 05:26:00,269 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-01-18 05:26:00,270 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:26:00 BoogieIcfgContainer [2022-01-18 05:26:00,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:26:00,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:26:00,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:26:00,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:26:00,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:59" (1/2) ... [2022-01-18 05:26:00,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1e1f6f and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:26:00, skipping insertion in model container [2022-01-18 05:26:00,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:26:00" (2/2) ... [2022-01-18 05:26:00,290 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2022-01-18 05:26:00,293 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:26:00,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:26:00,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:26:00,294 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:26:00,385 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-01-18 05:26:00,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:26:00,441 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, 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 [2022-01-18 05:26:00,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-01-18 05:26:00,456 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2022-01-18 05:26:00,541 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:26:00,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:00,568 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] [2022-01-18 05:26:00,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash 614274337, now seen corresponding path program 1 times [2022-01-18 05:26:00,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:00,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140455644] [2022-01-18 05:26:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:00,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:00,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:00,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140455644] [2022-01-18 05:26:00,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140455644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:00,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:00,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:26:00,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293678039] [2022-01-18 05:26:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:00,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:00,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:00,863 INFO L87 Difference]: Start difference. First operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:01,130 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2022-01-18 05:26:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:26:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:01,163 INFO L225 Difference]: With dead ends: 893 [2022-01-18 05:26:01,163 INFO L226 Difference]: Without dead ends: 874 [2022-01-18 05:26:01,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:01,167 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:01,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:26:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-18 05:26:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2022-01-18 05:26:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2022-01-18 05:26:01,254 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2022-01-18 05:26:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:01,255 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2022-01-18 05:26:01,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2022-01-18 05:26:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:26:01,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:01,259 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] [2022-01-18 05:26:01,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:26:01,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:01,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1825623495, now seen corresponding path program 2 times [2022-01-18 05:26:01,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:01,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461677690] [2022-01-18 05:26:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:01,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:01,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:01,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461677690] [2022-01-18 05:26:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461677690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:01,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:01,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:26:01,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767309616] [2022-01-18 05:26:01,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:01,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:01,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:01,348 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:01,489 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2022-01-18 05:26:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:26:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:01,496 INFO L225 Difference]: With dead ends: 872 [2022-01-18 05:26:01,496 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 05:26:01,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:01,501 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:01,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 05:26:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2022-01-18 05:26:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2022-01-18 05:26:01,544 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2022-01-18 05:26:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:01,544 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2022-01-18 05:26:01,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2022-01-18 05:26:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:26:01,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:01,548 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] [2022-01-18 05:26:01,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:26:01,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1890170752, now seen corresponding path program 1 times [2022-01-18 05:26:01,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:01,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007213101] [2022-01-18 05:26:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:01,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:01,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007213101] [2022-01-18 05:26:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007213101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:01,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:26:01,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614414085] [2022-01-18 05:26:01,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:01,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:01,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:01,629 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:01,725 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2022-01-18 05:26:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:26:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:01,732 INFO L225 Difference]: With dead ends: 867 [2022-01-18 05:26:01,732 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 05:26:01,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:01,739 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:01,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 55 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 05:26:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2022-01-18 05:26:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2022-01-18 05:26:01,770 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2022-01-18 05:26:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:01,771 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2022-01-18 05:26:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2022-01-18 05:26:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:26:01,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:01,774 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] [2022-01-18 05:26:01,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:26:01,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash 153525504, now seen corresponding path program 2 times [2022-01-18 05:26:01,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:01,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563706675] [2022-01-18 05:26:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:01,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:01,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:01,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563706675] [2022-01-18 05:26:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563706675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:01,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:01,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:26:01,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796786266] [2022-01-18 05:26:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:01,852 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:01,935 INFO L93 Difference]: Finished difference Result 736 states and 2873 transitions. [2022-01-18 05:26:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:26:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:26:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:01,940 INFO L225 Difference]: With dead ends: 736 [2022-01-18 05:26:01,940 INFO L226 Difference]: Without dead ends: 655 [2022-01-18 05:26:01,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:01,943 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:01,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-18 05:26:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 571. [2022-01-18 05:26:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.8526315789473684) internal successors, (2196), 570 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2196 transitions. [2022-01-18 05:26:01,966 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2196 transitions. Word has length 27 [2022-01-18 05:26:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2196 transitions. [2022-01-18 05:26:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2196 transitions. [2022-01-18 05:26:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:26:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:01,969 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] [2022-01-18 05:26:01,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:26:01,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash -481159728, now seen corresponding path program 1 times [2022-01-18 05:26:01,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:01,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428309614] [2022-01-18 05:26:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:01,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:02,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428309614] [2022-01-18 05:26:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428309614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192797689] [2022-01-18 05:26:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:02,013 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) [2022-01-18 05:26:02,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:26:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:02,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:26:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:02,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:02,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192797689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:02,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:02,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 05:26:02,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702559903] [2022-01-18 05:26:02,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:02,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:02,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:02,234 INFO L87 Difference]: Start difference. First operand 571 states and 2196 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:02,306 INFO L93 Difference]: Finished difference Result 898 states and 3436 transitions. [2022-01-18 05:26:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:26:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:26:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:02,312 INFO L225 Difference]: With dead ends: 898 [2022-01-18 05:26:02,312 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 05:26:02,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:02,313 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:02,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:02,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 05:26:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 754. [2022-01-18 05:26:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.911022576361222) internal successors, (2945), 753 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2945 transitions. [2022-01-18 05:26:02,336 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2945 transitions. Word has length 27 [2022-01-18 05:26:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:02,337 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2945 transitions. [2022-01-18 05:26:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2945 transitions. [2022-01-18 05:26:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:26:02,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:02,339 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] [2022-01-18 05:26:02,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:02,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:02,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -522499450, now seen corresponding path program 2 times [2022-01-18 05:26:02,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126133370] [2022-01-18 05:26:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:02,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:02,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126133370] [2022-01-18 05:26:02,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126133370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:02,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:02,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:26:02,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811283613] [2022-01-18 05:26:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:02,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:02,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:02,587 INFO L87 Difference]: Start difference. First operand 754 states and 2945 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:02,664 INFO L93 Difference]: Finished difference Result 854 states and 3195 transitions. [2022-01-18 05:26:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:26:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:02,670 INFO L225 Difference]: With dead ends: 854 [2022-01-18 05:26:02,670 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 05:26:02,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:02,671 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:02,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 05:26:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 733. [2022-01-18 05:26:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.9139344262295084) internal successors, (2865), 732 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2865 transitions. [2022-01-18 05:26:02,697 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2865 transitions. Word has length 27 [2022-01-18 05:26:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:02,697 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2865 transitions. [2022-01-18 05:26:02,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2865 transitions. [2022-01-18 05:26:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:02,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:02,702 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] [2022-01-18 05:26:02,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 05:26:02,703 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1959647599, now seen corresponding path program 1 times [2022-01-18 05:26:02,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:02,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965293617] [2022-01-18 05:26:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:02,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:02,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:02,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965293617] [2022-01-18 05:26:02,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965293617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:02,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191864025] [2022-01-18 05:26:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:02,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:02,896 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) [2022-01-18 05:26:02,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:26:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:02,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:02,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:03,379 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 11 treesize of output 7 [2022-01-18 05:26:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:03,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:03,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:03,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:03,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:03,701 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:26:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191864025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:03,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:03,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:26:03,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666008941] [2022-01-18 05:26:03,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:03,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:03,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:03,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:03,777 INFO L87 Difference]: Start difference. First operand 733 states and 2865 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:05,161 INFO L93 Difference]: Finished difference Result 1214 states and 4693 transitions. [2022-01-18 05:26:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:05,169 INFO L225 Difference]: With dead ends: 1214 [2022-01-18 05:26:05,169 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 05:26:05,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:26:05,171 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 346 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:05,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 452 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:26:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 05:26:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 839. [2022-01-18 05:26:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.908114558472554) internal successors, (3275), 838 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 3275 transitions. [2022-01-18 05:26:05,200 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 3275 transitions. Word has length 29 [2022-01-18 05:26:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:05,200 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 3275 transitions. [2022-01-18 05:26:05,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 3275 transitions. [2022-01-18 05:26:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:05,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:05,203 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] [2022-01-18 05:26:05,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:05,419 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,SelfDestructingSolverStorable6 [2022-01-18 05:26:05,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1724936761, now seen corresponding path program 2 times [2022-01-18 05:26:05,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:05,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657104834] [2022-01-18 05:26:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:05,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:05,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:05,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657104834] [2022-01-18 05:26:05,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657104834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881104837] [2022-01-18 05:26:05,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:05,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:05,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:05,577 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) [2022-01-18 05:26:05,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:26:05,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:05,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:05,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 21 [2022-01-18 05:26:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:06,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881104837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:06,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:06,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:06,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471380108] [2022-01-18 05:26:06,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:06,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:06,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:06,390 INFO L87 Difference]: Start difference. First operand 839 states and 3275 transitions. Second operand has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:07,035 INFO L93 Difference]: Finished difference Result 1161 states and 4488 transitions. [2022-01-18 05:26:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:26:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) 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 29 [2022-01-18 05:26:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:07,043 INFO L225 Difference]: With dead ends: 1161 [2022-01-18 05:26:07,043 INFO L226 Difference]: Without dead ends: 1142 [2022-01-18 05:26:07,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:26:07,044 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 147 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:07,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 291 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:26:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-18 05:26:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 842. [2022-01-18 05:26:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.906064209274673) internal successors, (3285), 841 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 3285 transitions. [2022-01-18 05:26:07,069 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 3285 transitions. Word has length 29 [2022-01-18 05:26:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:07,070 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 3285 transitions. [2022-01-18 05:26:07,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 3285 transitions. [2022-01-18 05:26:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:07,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:07,072 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] [2022-01-18 05:26:07,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 05:26:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:07,296 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1161339337, now seen corresponding path program 3 times [2022-01-18 05:26:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908961282] [2022-01-18 05:26:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:07,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908961282] [2022-01-18 05:26:07,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908961282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63285485] [2022-01-18 05:26:07,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:07,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:07,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:07,431 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) [2022-01-18 05:26:07,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:26:07,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:26:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:07,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:07,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 21 [2022-01-18 05:26:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:07,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:08,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63285485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:08,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:08,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:08,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024276410] [2022-01-18 05:26:08,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:08,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:08,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:08,120 INFO L87 Difference]: Start difference. First operand 842 states and 3285 transitions. Second operand has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:08,833 INFO L93 Difference]: Finished difference Result 1188 states and 4549 transitions. [2022-01-18 05:26:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) 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 29 [2022-01-18 05:26:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:08,840 INFO L225 Difference]: With dead ends: 1188 [2022-01-18 05:26:08,840 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 05:26:08,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:26:08,841 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 198 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:08,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 330 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:26:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 05:26:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 850. [2022-01-18 05:26:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.895170789163722) internal successors, (3307), 849 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3307 transitions. [2022-01-18 05:26:08,868 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3307 transitions. Word has length 29 [2022-01-18 05:26:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:08,870 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 3307 transitions. [2022-01-18 05:26:08,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3307 transitions. [2022-01-18 05:26:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:08,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:08,874 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] [2022-01-18 05:26:08,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:09,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:09,097 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 790114331, now seen corresponding path program 4 times [2022-01-18 05:26:09,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:09,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184636888] [2022-01-18 05:26:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:09,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:09,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184636888] [2022-01-18 05:26:09,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184636888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241278091] [2022-01-18 05:26:09,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:09,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:09,233 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) [2022-01-18 05:26:09,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:26:09,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:09,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:09,559 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 19 treesize of output 11 [2022-01-18 05:26:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:09,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:09,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:09,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:09,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:09,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:09,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241278091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:09,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:09,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:09,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851946367] [2022-01-18 05:26:09,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:09,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:09,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:09,920 INFO L87 Difference]: Start difference. First operand 850 states and 3307 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:11,090 INFO L93 Difference]: Finished difference Result 1755 states and 6735 transitions. [2022-01-18 05:26:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:26:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:11,101 INFO L225 Difference]: With dead ends: 1755 [2022-01-18 05:26:11,101 INFO L226 Difference]: Without dead ends: 1727 [2022-01-18 05:26:11,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:26:11,102 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 316 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:11,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 540 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:26:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-01-18 05:26:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 963. [2022-01-18 05:26:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.016632016632016) internal successors, (3864), 962 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3864 transitions. [2022-01-18 05:26:11,133 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3864 transitions. Word has length 29 [2022-01-18 05:26:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:11,133 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3864 transitions. [2022-01-18 05:26:11,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3864 transitions. [2022-01-18 05:26:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:11,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:11,137 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] [2022-01-18 05:26:11,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:11,351 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,SelfDestructingSolverStorable9 [2022-01-18 05:26:11,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2099674321, now seen corresponding path program 5 times [2022-01-18 05:26:11,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236555103] [2022-01-18 05:26:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:11,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:11,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:11,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236555103] [2022-01-18 05:26:11,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236555103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:11,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230762472] [2022-01-18 05:26:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:11,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:11,495 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) [2022-01-18 05:26:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:26:11,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:11,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:26:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:11,774 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 05:26:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:11,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:12,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:12,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:12,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:12,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230762472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:12,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:12,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2022-01-18 05:26:12,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279502911] [2022-01-18 05:26:12,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:12,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:26:12,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:26:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:12,173 INFO L87 Difference]: Start difference. First operand 963 states and 3864 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:13,986 INFO L93 Difference]: Finished difference Result 2261 states and 8768 transitions. [2022-01-18 05:26:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:26:13,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:13,998 INFO L225 Difference]: With dead ends: 2261 [2022-01-18 05:26:13,998 INFO L226 Difference]: Without dead ends: 2188 [2022-01-18 05:26:13,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:26:14,000 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 517 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:14,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 742 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 05:26:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2022-01-18 05:26:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 947. [2022-01-18 05:26:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.028541226215645) internal successors, (3811), 946 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3811 transitions. [2022-01-18 05:26:14,035 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3811 transitions. Word has length 29 [2022-01-18 05:26:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:14,035 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3811 transitions. [2022-01-18 05:26:14,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3811 transitions. [2022-01-18 05:26:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:14,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:14,038 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] [2022-01-18 05:26:14,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:14,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:14,252 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1181516803, now seen corresponding path program 6 times [2022-01-18 05:26:14,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192997924] [2022-01-18 05:26:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:14,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:14,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192997924] [2022-01-18 05:26:14,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192997924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087629233] [2022-01-18 05:26:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:14,378 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) [2022-01-18 05:26:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:26:14,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:26:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:14,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:14,522 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 05:26:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:14,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087629233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:14,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:14,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:26:14,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708901077] [2022-01-18 05:26:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:26:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:26:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:14,926 INFO L87 Difference]: Start difference. First operand 947 states and 3811 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:26:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:15,307 INFO L93 Difference]: Finished difference Result 1340 states and 5308 transitions. [2022-01-18 05:26:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:26:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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 29 [2022-01-18 05:26:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:15,315 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 05:26:15,316 INFO L226 Difference]: Without dead ends: 1321 [2022-01-18 05:26:15,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:26:15,316 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 234 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 194 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:26:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-01-18 05:26:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1034. [2022-01-18 05:26:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.078412391093901) internal successors, (4213), 1033 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4213 transitions. [2022-01-18 05:26:15,343 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4213 transitions. Word has length 29 [2022-01-18 05:26:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:15,344 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4213 transitions. [2022-01-18 05:26:15,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:26:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4213 transitions. [2022-01-18 05:26:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:15,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:15,347 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, 1, 1, 1] [2022-01-18 05:26:15,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:15,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:15,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:15,562 INFO L85 PathProgramCache]: Analyzing trace with hash 121755803, now seen corresponding path program 7 times [2022-01-18 05:26:15,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:15,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667702833] [2022-01-18 05:26:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:15,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:15,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667702833] [2022-01-18 05:26:15,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667702833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063834113] [2022-01-18 05:26:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:15,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:15,703 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) [2022-01-18 05:26:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:26:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:15,949 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 15 treesize of output 7 [2022-01-18 05:26:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:16,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:16,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:16,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:16,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:16,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:16,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063834113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:16,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:16,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:16,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710226580] [2022-01-18 05:26:16,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:16,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:16,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:16,309 INFO L87 Difference]: Start difference. First operand 1034 states and 4213 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:17,168 INFO L93 Difference]: Finished difference Result 1788 states and 6981 transitions. [2022-01-18 05:26:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:17,176 INFO L225 Difference]: With dead ends: 1788 [2022-01-18 05:26:17,176 INFO L226 Difference]: Without dead ends: 1760 [2022-01-18 05:26:17,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:26:17,177 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 351 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:17,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 455 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-01-18 05:26:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1124. [2022-01-18 05:26:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 4.140694568121104) internal successors, (4650), 1123 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4650 transitions. [2022-01-18 05:26:17,212 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4650 transitions. Word has length 29 [2022-01-18 05:26:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:17,212 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 4650 transitions. [2022-01-18 05:26:17,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4650 transitions. [2022-01-18 05:26:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:17,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:17,215 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] [2022-01-18 05:26:17,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:17,438 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,SelfDestructingSolverStorable12 [2022-01-18 05:26:17,438 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 68369283, now seen corresponding path program 8 times [2022-01-18 05:26:17,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:17,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525307134] [2022-01-18 05:26:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:17,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:17,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525307134] [2022-01-18 05:26:17,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525307134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340414671] [2022-01-18 05:26:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:17,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:17,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:17,559 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) [2022-01-18 05:26:17,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:26:17,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:17,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:17,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:17,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:17,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:18,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340414671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:18,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:26:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955604082] [2022-01-18 05:26:18,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:18,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:18,162 INFO L87 Difference]: Start difference. First operand 1124 states and 4650 transitions. Second operand has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:18,718 INFO L93 Difference]: Finished difference Result 1434 states and 5758 transitions. [2022-01-18 05:26:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:26:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) 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 29 [2022-01-18 05:26:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:18,725 INFO L225 Difference]: With dead ends: 1434 [2022-01-18 05:26:18,725 INFO L226 Difference]: Without dead ends: 1411 [2022-01-18 05:26:18,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:26:18,726 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 229 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:18,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 282 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-01-18 05:26:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1084. [2022-01-18 05:26:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 4.1320406278855035) internal successors, (4475), 1083 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4475 transitions. [2022-01-18 05:26:18,783 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4475 transitions. Word has length 29 [2022-01-18 05:26:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:18,783 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 4475 transitions. [2022-01-18 05:26:18,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:26:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4475 transitions. [2022-01-18 05:26:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:18,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:18,787 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] [2022-01-18 05:26:18,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:18,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 05:26:18,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2131198379, now seen corresponding path program 9 times [2022-01-18 05:26:18,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:18,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84655974] [2022-01-18 05:26:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:18,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:19,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:19,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84655974] [2022-01-18 05:26:19,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84655974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:19,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786268406] [2022-01-18 05:26:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:19,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:19,139 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) [2022-01-18 05:26:19,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:26:19,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:26:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:19,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:19,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:19,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786268406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:19,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:26:19,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058604245] [2022-01-18 05:26:19,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:19,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:26:19,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:26:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:19,650 INFO L87 Difference]: Start difference. First operand 1084 states and 4475 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:26:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:20,091 INFO L93 Difference]: Finished difference Result 1290 states and 5264 transitions. [2022-01-18 05:26:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:26:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 29 [2022-01-18 05:26:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:20,095 INFO L225 Difference]: With dead ends: 1290 [2022-01-18 05:26:20,095 INFO L226 Difference]: Without dead ends: 1275 [2022-01-18 05:26:20,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:20,096 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:20,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 315 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-01-18 05:26:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1090. [2022-01-18 05:26:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 4.124885215794307) internal successors, (4492), 1089 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 4492 transitions. [2022-01-18 05:26:20,123 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 4492 transitions. Word has length 29 [2022-01-18 05:26:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,123 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 4492 transitions. [2022-01-18 05:26:20,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:26:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 4492 transitions. [2022-01-18 05:26:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:20,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,126 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] [2022-01-18 05:26:20,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 05:26:20,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 05:26:20,337 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -79176119, now seen corresponding path program 10 times [2022-01-18 05:26:20,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523030641] [2022-01-18 05:26:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523030641] [2022-01-18 05:26:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523030641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655083421] [2022-01-18 05:26:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:20,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:20,474 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) [2022-01-18 05:26:20,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:26:20,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:20,666 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 15 treesize of output 7 [2022-01-18 05:26:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:20,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:20,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:20,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655083421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:21,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:21,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:21,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720204917] [2022-01-18 05:26:21,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:21,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:21,024 INFO L87 Difference]: Start difference. First operand 1090 states and 4492 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:21,886 INFO L93 Difference]: Finished difference Result 1640 states and 6539 transitions. [2022-01-18 05:26:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:26:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:21,891 INFO L225 Difference]: With dead ends: 1640 [2022-01-18 05:26:21,891 INFO L226 Difference]: Without dead ends: 1616 [2022-01-18 05:26:21,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:26:21,892 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 338 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:21,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 424 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-01-18 05:26:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1094. [2022-01-18 05:26:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 4.12259835315645) internal successors, (4506), 1093 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4506 transitions. [2022-01-18 05:26:21,921 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4506 transitions. Word has length 29 [2022-01-18 05:26:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:21,921 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 4506 transitions. [2022-01-18 05:26:21,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4506 transitions. [2022-01-18 05:26:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:21,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:21,925 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] [2022-01-18 05:26:21,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:22,143 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,SelfDestructingSolverStorable15 [2022-01-18 05:26:22,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1082425977, now seen corresponding path program 11 times [2022-01-18 05:26:22,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440232088] [2022-01-18 05:26:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:22,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440232088] [2022-01-18 05:26:22,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440232088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686777522] [2022-01-18 05:26:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:22,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:22,280 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) [2022-01-18 05:26:22,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:26:22,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:26:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:26:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:22,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 treesize of output 7 [2022-01-18 05:26:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:22,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:22,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:22,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:22,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:22,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686777522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:22,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:22,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-01-18 05:26:22,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249671606] [2022-01-18 05:26:22,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:22,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:22,863 INFO L87 Difference]: Start difference. First operand 1094 states and 4506 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:24,030 INFO L93 Difference]: Finished difference Result 2131 states and 8371 transitions. [2022-01-18 05:26:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:26:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:24,039 INFO L225 Difference]: With dead ends: 2131 [2022-01-18 05:26:24,039 INFO L226 Difference]: Without dead ends: 2093 [2022-01-18 05:26:24,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:26:24,041 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 504 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:24,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 512 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:26:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-01-18 05:26:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1262. [2022-01-18 05:26:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.207771609833466) internal successors, (5306), 1261 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5306 transitions. [2022-01-18 05:26:24,082 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5306 transitions. Word has length 29 [2022-01-18 05:26:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5306 transitions. [2022-01-18 05:26:24,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5306 transitions. [2022-01-18 05:26:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:24,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:24,086 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] [2022-01-18 05:26:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:24,295 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,SelfDestructingSolverStorable16 [2022-01-18 05:26:24,295 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1909268713, now seen corresponding path program 12 times [2022-01-18 05:26:24,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087803643] [2022-01-18 05:26:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:24,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:24,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087803643] [2022-01-18 05:26:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087803643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425164844] [2022-01-18 05:26:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:24,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:24,438 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) [2022-01-18 05:26:24,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:26:24,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:26:24,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:24,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:24,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:24,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425164844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:24,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:24,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 05:26:24,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022683717] [2022-01-18 05:26:24,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:24,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:26:24,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:26:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:24,877 INFO L87 Difference]: Start difference. First operand 1262 states and 5306 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2022-01-18 05:26:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:25,185 INFO L93 Difference]: Finished difference Result 1616 states and 6533 transitions. [2022-01-18 05:26:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:26:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 29 [2022-01-18 05:26:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:25,192 INFO L225 Difference]: With dead ends: 1616 [2022-01-18 05:26:25,192 INFO L226 Difference]: Without dead ends: 1603 [2022-01-18 05:26:25,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:25,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 188 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:26:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-01-18 05:26:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1262. [2022-01-18 05:26:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.205392545598731) internal successors, (5303), 1261 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5303 transitions. [2022-01-18 05:26:25,228 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5303 transitions. Word has length 29 [2022-01-18 05:26:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:25,228 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5303 transitions. [2022-01-18 05:26:25,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2022-01-18 05:26:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5303 transitions. [2022-01-18 05:26:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:25,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:25,232 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] [2022-01-18 05:26:25,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:25,452 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,SelfDestructingSolverStorable17 [2022-01-18 05:26:25,453 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1486336511, now seen corresponding path program 13 times [2022-01-18 05:26:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227477432] [2022-01-18 05:26:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:25,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:25,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:25,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227477432] [2022-01-18 05:26:25,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227477432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:25,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119278342] [2022-01-18 05:26:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:25,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:25,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:25,585 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) [2022-01-18 05:26:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:26:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:25,776 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 15 treesize of output 7 [2022-01-18 05:26:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:25,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:26,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:26,075 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 17 treesize of output 22 [2022-01-18 05:26:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:26,090 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 17 treesize of output 7 [2022-01-18 05:26:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:26,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119278342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:26,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:26:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661227350] [2022-01-18 05:26:26,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:26,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:26:26,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:26:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:26:26,142 INFO L87 Difference]: Start difference. First operand 1262 states and 5303 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:27,093 INFO L93 Difference]: Finished difference Result 2003 states and 7967 transitions. [2022-01-18 05:26:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:26:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:27,100 INFO L225 Difference]: With dead ends: 2003 [2022-01-18 05:26:27,100 INFO L226 Difference]: Without dead ends: 1957 [2022-01-18 05:26:27,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:26:27,101 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 412 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:27,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 420 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-01-18 05:26:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1229. [2022-01-18 05:26:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.19299674267101) internal successors, (5149), 1228 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5149 transitions. [2022-01-18 05:26:27,134 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5149 transitions. Word has length 29 [2022-01-18 05:26:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:27,134 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 5149 transitions. [2022-01-18 05:26:27,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5149 transitions. [2022-01-18 05:26:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:27,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:27,137 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] [2022-01-18 05:26:27,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:27,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:27,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1601658297, now seen corresponding path program 14 times [2022-01-18 05:26:27,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928584467] [2022-01-18 05:26:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:27,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928584467] [2022-01-18 05:26:27,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928584467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442429114] [2022-01-18 05:26:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:27,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:27,508 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) [2022-01-18 05:26:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:26:27,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:27,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:27,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:27,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:28,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442429114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:28,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:28,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:26:28,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979549647] [2022-01-18 05:26:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:28,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:26:28,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:26:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:26:28,180 INFO L87 Difference]: Start difference. First operand 1229 states and 5149 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) 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) [2022-01-18 05:26:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:28,721 INFO L93 Difference]: Finished difference Result 1449 states and 5983 transitions. [2022-01-18 05:26:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) 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 29 [2022-01-18 05:26:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:28,724 INFO L225 Difference]: With dead ends: 1449 [2022-01-18 05:26:28,724 INFO L226 Difference]: Without dead ends: 1430 [2022-01-18 05:26:28,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:26:28,725 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:28,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 301 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-01-18 05:26:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1214. [2022-01-18 05:26:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 4.196207749381698) internal successors, (5090), 1213 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 5090 transitions. [2022-01-18 05:26:28,754 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 5090 transitions. Word has length 29 [2022-01-18 05:26:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:28,754 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 5090 transitions. [2022-01-18 05:26:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) 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) [2022-01-18 05:26:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 5090 transitions. [2022-01-18 05:26:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:28,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:28,757 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, 1, 1, 1] [2022-01-18 05:26:28,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:28,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:28,984 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash -801130063, now seen corresponding path program 1 times [2022-01-18 05:26:28,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:28,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47108762] [2022-01-18 05:26:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:28,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47108762] [2022-01-18 05:26:29,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47108762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870297923] [2022-01-18 05:26:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:29,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:29,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:29,108 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) [2022-01-18 05:26:29,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:26:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:29,275 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 15 treesize of output 7 [2022-01-18 05:26:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:29,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:29,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:29,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:29,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870297923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:29,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:26:29,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881993322] [2022-01-18 05:26:29,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:29,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:26:29,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:26:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:26:29,605 INFO L87 Difference]: Start difference. First operand 1214 states and 5090 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:30,596 INFO L93 Difference]: Finished difference Result 2164 states and 8762 transitions. [2022-01-18 05:26:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:26:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:30,601 INFO L225 Difference]: With dead ends: 2164 [2022-01-18 05:26:30,601 INFO L226 Difference]: Without dead ends: 2126 [2022-01-18 05:26:30,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:26:30,602 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 437 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:30,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 425 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-01-18 05:26:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1426. [2022-01-18 05:26:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.269473684210526) internal successors, (6084), 1425 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6084 transitions. [2022-01-18 05:26:30,642 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6084 transitions. Word has length 29 [2022-01-18 05:26:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:30,643 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6084 transitions. [2022-01-18 05:26:30,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6084 transitions. [2022-01-18 05:26:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:30,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:30,646 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] [2022-01-18 05:26:30,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:30,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:30,860 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 621224763, now seen corresponding path program 2 times [2022-01-18 05:26:30,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431569040] [2022-01-18 05:26:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:30,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:30,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431569040] [2022-01-18 05:26:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431569040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344896820] [2022-01-18 05:26:30,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:30,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:30,985 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) [2022-01-18 05:26:30,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:26:31,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:31,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:31,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:31,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344896820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:31,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:31,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:26:31,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676328885] [2022-01-18 05:26:31,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:31,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:31,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:31,547 INFO L87 Difference]: Start difference. First operand 1426 states and 6084 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:32,219 INFO L93 Difference]: Finished difference Result 1744 states and 7265 transitions. [2022-01-18 05:26:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:26:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 05:26:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:32,224 INFO L225 Difference]: With dead ends: 1744 [2022-01-18 05:26:32,224 INFO L226 Difference]: Without dead ends: 1731 [2022-01-18 05:26:32,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:26:32,224 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:32,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 376 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:26:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-18 05:26:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1426. [2022-01-18 05:26:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.267368421052631) internal successors, (6081), 1425 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6081 transitions. [2022-01-18 05:26:32,255 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6081 transitions. Word has length 29 [2022-01-18 05:26:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:32,255 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6081 transitions. [2022-01-18 05:26:32,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6081 transitions. [2022-01-18 05:26:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:32,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:32,259 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] [2022-01-18 05:26:32,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:32,475 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 176122743, now seen corresponding path program 3 times [2022-01-18 05:26:32,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829146025] [2022-01-18 05:26:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:32,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:32,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829146025] [2022-01-18 05:26:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829146025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613508544] [2022-01-18 05:26:32,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:32,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:32,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:32,591 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) [2022-01-18 05:26:32,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:26:32,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:26:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:32,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:32,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:32,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:33,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613508544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:33,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:33,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:26:33,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189907469] [2022-01-18 05:26:33,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:33,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:26:33,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:26:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:33,029 INFO L87 Difference]: Start difference. First operand 1426 states and 6081 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:26:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:33,466 INFO L93 Difference]: Finished difference Result 1768 states and 7335 transitions. [2022-01-18 05:26:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:26:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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 29 [2022-01-18 05:26:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:33,471 INFO L225 Difference]: With dead ends: 1768 [2022-01-18 05:26:33,471 INFO L226 Difference]: Without dead ends: 1740 [2022-01-18 05:26:33,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:26:33,471 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 188 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:33,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 240 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:26:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-01-18 05:26:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1383. [2022-01-18 05:26:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 4.2691751085383505) internal successors, (5900), 1382 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 5900 transitions. [2022-01-18 05:26:33,504 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 5900 transitions. Word has length 29 [2022-01-18 05:26:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 5900 transitions. [2022-01-18 05:26:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:26:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 5900 transitions. [2022-01-18 05:26:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:33,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:33,508 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] [2022-01-18 05:26:33,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:33,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:33,723 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash 660102987, now seen corresponding path program 4 times [2022-01-18 05:26:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329501632] [2022-01-18 05:26:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:33,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329501632] [2022-01-18 05:26:33,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329501632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209885061] [2022-01-18 05:26:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:33,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:33,876 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) [2022-01-18 05:26:33,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:26:33,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:34,064 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 15 treesize of output 7 [2022-01-18 05:26:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:34,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:34,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:34,387 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 17 treesize of output 7 [2022-01-18 05:26:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209885061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:34,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:26:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012928849] [2022-01-18 05:26:34,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:34,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:34,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:34,444 INFO L87 Difference]: Start difference. First operand 1383 states and 5900 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:35,657 INFO L93 Difference]: Finished difference Result 2052 states and 8368 transitions. [2022-01-18 05:26:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:26:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:35,662 INFO L225 Difference]: With dead ends: 2052 [2022-01-18 05:26:35,662 INFO L226 Difference]: Without dead ends: 2003 [2022-01-18 05:26:35,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:26:35,663 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 394 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:35,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 495 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:26:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-01-18 05:26:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1377. [2022-01-18 05:26:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 4.2688953488372094) internal successors, (5874), 1376 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 5874 transitions. [2022-01-18 05:26:35,692 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 5874 transitions. Word has length 29 [2022-01-18 05:26:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 5874 transitions. [2022-01-18 05:26:35,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 5874 transitions. [2022-01-18 05:26:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:35,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:35,696 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, 1, 1, 1] [2022-01-18 05:26:35,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:35,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:35,919 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash -703947667, now seen corresponding path program 5 times [2022-01-18 05:26:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345803816] [2022-01-18 05:26:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:35,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:36,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345803816] [2022-01-18 05:26:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345803816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788717389] [2022-01-18 05:26:36,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:36,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:36,035 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) [2022-01-18 05:26:36,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:26:36,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:26:36,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:36,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:26:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:36,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 treesize of output 7 [2022-01-18 05:26:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:36,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:36,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:36,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:36,522 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 17 treesize of output 7 [2022-01-18 05:26:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:36,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788717389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:36,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:36,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-01-18 05:26:36,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474479593] [2022-01-18 05:26:36,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:36,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:36,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:36,595 INFO L87 Difference]: Start difference. First operand 1377 states and 5874 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:37,731 INFO L93 Difference]: Finished difference Result 2556 states and 10250 transitions. [2022-01-18 05:26:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:26:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:37,737 INFO L225 Difference]: With dead ends: 2556 [2022-01-18 05:26:37,737 INFO L226 Difference]: Without dead ends: 2518 [2022-01-18 05:26:37,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:26:37,738 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 538 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:37,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 503 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:26:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-01-18 05:26:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1503. [2022-01-18 05:26:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.2982689747004) internal successors, (6456), 1502 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6456 transitions. [2022-01-18 05:26:37,766 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6456 transitions. Word has length 29 [2022-01-18 05:26:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:37,766 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6456 transitions. [2022-01-18 05:26:37,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6456 transitions. [2022-01-18 05:26:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:37,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:37,769 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] [2022-01-18 05:26:37,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-18 05:26:37,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 05:26:37,969 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash 718407159, now seen corresponding path program 6 times [2022-01-18 05:26:37,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:37,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496190559] [2022-01-18 05:26:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:37,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496190559] [2022-01-18 05:26:38,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496190559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839468447] [2022-01-18 05:26:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:38,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:38,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:38,079 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) [2022-01-18 05:26:38,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:26:38,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:26:38,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:38,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:38,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839468447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:38,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:38,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 05:26:38,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079223165] [2022-01-18 05:26:38,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:38,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:26:38,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:26:38,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:38,506 INFO L87 Difference]: Start difference. First operand 1503 states and 6456 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:26:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:38,916 INFO L93 Difference]: Finished difference Result 1897 states and 7821 transitions. [2022-01-18 05:26:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:26:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 29 [2022-01-18 05:26:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:38,921 INFO L225 Difference]: With dead ends: 1897 [2022-01-18 05:26:38,921 INFO L226 Difference]: Without dead ends: 1884 [2022-01-18 05:26:38,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:38,922 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:38,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-01-18 05:26:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1503. [2022-01-18 05:26:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.296271637816245) internal successors, (6453), 1502 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6453 transitions. [2022-01-18 05:26:38,951 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6453 transitions. Word has length 29 [2022-01-18 05:26:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:38,951 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6453 transitions. [2022-01-18 05:26:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:26:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6453 transitions. [2022-01-18 05:26:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:38,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:38,955 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] [2022-01-18 05:26:38,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 05:26:39,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 05:26:39,163 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 273305139, now seen corresponding path program 7 times [2022-01-18 05:26:39,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226649027] [2022-01-18 05:26:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:39,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:39,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226649027] [2022-01-18 05:26:39,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226649027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693101362] [2022-01-18 05:26:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:39,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:39,290 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) [2022-01-18 05:26:39,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:26:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:39,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:39,457 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 15 treesize of output 7 [2022-01-18 05:26:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:39,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:39,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:39,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:39,746 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:26:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:39,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693101362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:39,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:39,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:26:39,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247604578] [2022-01-18 05:26:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:39,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:26:39,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:26:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:26:39,796 INFO L87 Difference]: Start difference. First operand 1503 states and 6453 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:40,736 INFO L93 Difference]: Finished difference Result 2408 states and 9776 transitions. [2022-01-18 05:26:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:26:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:40,741 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 05:26:40,741 INFO L226 Difference]: Without dead ends: 2362 [2022-01-18 05:26:40,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:26:40,742 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 442 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-01-18 05:26:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1463. [2022-01-18 05:26:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 4.292065663474692) internal successors, (6275), 1462 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 6275 transitions. [2022-01-18 05:26:40,769 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 6275 transitions. Word has length 29 [2022-01-18 05:26:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 6275 transitions. [2022-01-18 05:26:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 6275 transitions. [2022-01-18 05:26:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:40,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:40,772 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, 1, 1, 1] [2022-01-18 05:26:40,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 05:26:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 05:26:40,973 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1839456173, now seen corresponding path program 8 times [2022-01-18 05:26:40,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458459170] [2022-01-18 05:26:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:40,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:41,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458459170] [2022-01-18 05:26:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458459170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:41,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764043006] [2022-01-18 05:26:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:41,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:41,095 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) [2022-01-18 05:26:41,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:26:41,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:41,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:41,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764043006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:41,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:41,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:26:41,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890536949] [2022-01-18 05:26:41,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:26:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:26:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:26:41,712 INFO L87 Difference]: Start difference. First operand 1463 states and 6275 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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) [2022-01-18 05:26:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:42,351 INFO L93 Difference]: Finished difference Result 1689 states and 7120 transitions. [2022-01-18 05:26:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 29 [2022-01-18 05:26:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:42,356 INFO L225 Difference]: With dead ends: 1689 [2022-01-18 05:26:42,356 INFO L226 Difference]: Without dead ends: 1670 [2022-01-18 05:26:42,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:26:42,356 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:42,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:26:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-01-18 05:26:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1472. [2022-01-18 05:26:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 4.282121006118287) internal successors, (6299), 1471 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 6299 transitions. [2022-01-18 05:26:42,381 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 6299 transitions. Word has length 29 [2022-01-18 05:26:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:42,382 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 6299 transitions. [2022-01-18 05:26:42,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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) [2022-01-18 05:26:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 6299 transitions. [2022-01-18 05:26:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:42,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:42,385 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] [2022-01-18 05:26:42,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 05:26:42,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:42,585 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash -329809185, now seen corresponding path program 9 times [2022-01-18 05:26:42,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:42,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546060451] [2022-01-18 05:26:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:42,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:42,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546060451] [2022-01-18 05:26:42,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546060451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333879831] [2022-01-18 05:26:42,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:42,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:42,708 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) [2022-01-18 05:26:42,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:26:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:26:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:26:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:42,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:42,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:43,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333879831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:43,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:43,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 05:26:43,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387241263] [2022-01-18 05:26:43,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:43,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:26:43,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:26:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:26:43,170 INFO L87 Difference]: Start difference. First operand 1472 states and 6299 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2022-01-18 05:26:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:43,674 INFO L93 Difference]: Finished difference Result 2079 states and 8528 transitions. [2022-01-18 05:26:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:26:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 29 [2022-01-18 05:26:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:43,679 INFO L225 Difference]: With dead ends: 2079 [2022-01-18 05:26:43,679 INFO L226 Difference]: Without dead ends: 2060 [2022-01-18 05:26:43,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:26:43,680 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:43,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 268 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-01-18 05:26:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1500. [2022-01-18 05:26:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 4.280186791194129) internal successors, (6416), 1499 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 6416 transitions. [2022-01-18 05:26:43,707 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 6416 transitions. Word has length 29 [2022-01-18 05:26:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:43,707 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 6416 transitions. [2022-01-18 05:26:43,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2022-01-18 05:26:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 6416 transitions. [2022-01-18 05:26:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:43,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:43,710 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] [2022-01-18 05:26:43,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 05:26:43,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 05:26:43,910 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545641, now seen corresponding path program 10 times [2022-01-18 05:26:43,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:43,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083597286] [2022-01-18 05:26:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:43,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:44,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083597286] [2022-01-18 05:26:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083597286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464557665] [2022-01-18 05:26:44,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:44,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:44,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:44,018 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) [2022-01-18 05:26:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:26:44,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:44,226 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 19 treesize of output 11 [2022-01-18 05:26:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:44,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:44,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:44,460 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 17 treesize of output 22 [2022-01-18 05:26:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:44,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464557665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:44,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:44,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299328535] [2022-01-18 05:26:44,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:44,523 INFO L87 Difference]: Start difference. First operand 1500 states and 6416 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:45,281 INFO L93 Difference]: Finished difference Result 2826 states and 11385 transitions. [2022-01-18 05:26:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:45,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:45,288 INFO L225 Difference]: With dead ends: 2826 [2022-01-18 05:26:45,288 INFO L226 Difference]: Without dead ends: 2798 [2022-01-18 05:26:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:26:45,289 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 403 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:26:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-01-18 05:26:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1634. [2022-01-18 05:26:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 4.315370483772198) internal successors, (7047), 1633 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 7047 transitions. [2022-01-18 05:26:45,326 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 7047 transitions. Word has length 29 [2022-01-18 05:26:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:45,326 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 7047 transitions. [2022-01-18 05:26:45,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 7047 transitions. [2022-01-18 05:26:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:45,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:45,330 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] [2022-01-18 05:26:45,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 05:26:45,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:45,530 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1493419173, now seen corresponding path program 11 times [2022-01-18 05:26:45,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836033485] [2022-01-18 05:26:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:45,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:45,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836033485] [2022-01-18 05:26:45,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836033485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:45,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503062199] [2022-01-18 05:26:45,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:45,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:45,626 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) [2022-01-18 05:26:45,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:26:45,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:26:45,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:45,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:45,805 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 19 treesize of output 11 [2022-01-18 05:26:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:46,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:46,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:46,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503062199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:46,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:46,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:46,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528177737] [2022-01-18 05:26:46,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:46,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:46,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:46,103 INFO L87 Difference]: Start difference. First operand 1634 states and 7047 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:47,009 INFO L93 Difference]: Finished difference Result 2812 states and 11355 transitions. [2022-01-18 05:26:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:47,015 INFO L225 Difference]: With dead ends: 2812 [2022-01-18 05:26:47,016 INFO L226 Difference]: Without dead ends: 2767 [2022-01-18 05:26:47,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:26:47,016 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 344 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:47,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 562 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:26:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-01-18 05:26:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 1629. [2022-01-18 05:26:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 4.327395577395578) internal successors, (7045), 1628 states have internal predecessors, (7045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 7045 transitions. [2022-01-18 05:26:47,046 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 7045 transitions. Word has length 29 [2022-01-18 05:26:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:47,046 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 7045 transitions. [2022-01-18 05:26:47,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 7045 transitions. [2022-01-18 05:26:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:47,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:47,049 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] [2022-01-18 05:26:47,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:47,249 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,SelfDestructingSolverStorable30 [2022-01-18 05:26:47,250 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2081372641, now seen corresponding path program 12 times [2022-01-18 05:26:47,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980800274] [2022-01-18 05:26:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:47,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980800274] [2022-01-18 05:26:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980800274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106163588] [2022-01-18 05:26:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:47,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:47,364 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) [2022-01-18 05:26:47,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:26:47,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:26:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:47,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:47,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 treesize of output 17 [2022-01-18 05:26:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106163588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:47,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118771382] [2022-01-18 05:26:47,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:47,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:47,931 INFO L87 Difference]: Start difference. First operand 1629 states and 7045 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:48,482 INFO L93 Difference]: Finished difference Result 1983 states and 8362 transitions. [2022-01-18 05:26:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 05:26:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:48,487 INFO L225 Difference]: With dead ends: 1983 [2022-01-18 05:26:48,487 INFO L226 Difference]: Without dead ends: 1964 [2022-01-18 05:26:48,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:26:48,488 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:48,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 332 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-18 05:26:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1617. [2022-01-18 05:26:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.3316831683168315) internal successors, (7000), 1616 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7000 transitions. [2022-01-18 05:26:48,514 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7000 transitions. Word has length 29 [2022-01-18 05:26:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:48,514 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 7000 transitions. [2022-01-18 05:26:48,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7000 transitions. [2022-01-18 05:26:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:48,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:48,517 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] [2022-01-18 05:26:48,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:48,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:48,718 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 74229341, now seen corresponding path program 13 times [2022-01-18 05:26:48,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:48,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083963842] [2022-01-18 05:26:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:48,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:48,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083963842] [2022-01-18 05:26:48,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083963842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155691088] [2022-01-18 05:26:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:48,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:48,822 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) [2022-01-18 05:26:48,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:26:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:49,052 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 19 treesize of output 11 [2022-01-18 05:26:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:49,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:49,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:49,286 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 17 treesize of output 22 [2022-01-18 05:26:49,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:49,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:49,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155691088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:49,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:49,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:26:49,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707316320] [2022-01-18 05:26:49,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:49,347 INFO L87 Difference]: Start difference. First operand 1617 states and 7000 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:50,288 INFO L93 Difference]: Finished difference Result 2035 states and 8556 transitions. [2022-01-18 05:26:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:50,293 INFO L225 Difference]: With dead ends: 2035 [2022-01-18 05:26:50,293 INFO L226 Difference]: Without dead ends: 2016 [2022-01-18 05:26:50,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:26:50,294 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:50,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 420 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-01-18 05:26:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1620. [2022-01-18 05:26:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.32674490426189) internal successors, (7005), 1619 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7005 transitions. [2022-01-18 05:26:50,327 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7005 transitions. Word has length 29 [2022-01-18 05:26:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:50,327 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 7005 transitions. [2022-01-18 05:26:50,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7005 transitions. [2022-01-18 05:26:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:50,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:50,331 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] [2022-01-18 05:26:50,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:50,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:50,552 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2144591933, now seen corresponding path program 14 times [2022-01-18 05:26:50,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:50,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927391281] [2022-01-18 05:26:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:50,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:50,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:50,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927391281] [2022-01-18 05:26:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927391281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:50,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573676301] [2022-01-18 05:26:50,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:50,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:50,668 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) [2022-01-18 05:26:50,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:26:50,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:50,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:50,910 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 05:26:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:51,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573676301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:51,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364676948] [2022-01-18 05:26:51,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:51,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:51,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:51,219 INFO L87 Difference]: Start difference. First operand 1620 states and 7005 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:51,680 INFO L93 Difference]: Finished difference Result 1952 states and 8242 transitions. [2022-01-18 05:26:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:26:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 05:26:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:51,685 INFO L225 Difference]: With dead ends: 1952 [2022-01-18 05:26:51,685 INFO L226 Difference]: Without dead ends: 1933 [2022-01-18 05:26:51,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:26:51,686 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:51,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 272 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:26:51,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-01-18 05:26:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1617. [2022-01-18 05:26:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.329207920792079) internal successors, (6996), 1616 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 6996 transitions. [2022-01-18 05:26:51,725 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 6996 transitions. Word has length 29 [2022-01-18 05:26:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:51,725 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 6996 transitions. [2022-01-18 05:26:51,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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) [2022-01-18 05:26:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 6996 transitions. [2022-01-18 05:26:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:51,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:51,729 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] [2022-01-18 05:26:51,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:51,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:51,931 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1194824863, now seen corresponding path program 15 times [2022-01-18 05:26:51,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244718534] [2022-01-18 05:26:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:51,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:52,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244718534] [2022-01-18 05:26:52,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244718534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960503999] [2022-01-18 05:26:52,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:52,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:52,034 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) [2022-01-18 05:26:52,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:26:52,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:26:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:52,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:52,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:52,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:52,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960503999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:52,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:52,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:52,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561020981] [2022-01-18 05:26:52,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:52,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:52,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:52,538 INFO L87 Difference]: Start difference. First operand 1617 states and 6996 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:26:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:53,147 INFO L93 Difference]: Finished difference Result 2176 states and 9141 transitions. [2022-01-18 05:26:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:26:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:26:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:53,152 INFO L225 Difference]: With dead ends: 2176 [2022-01-18 05:26:53,152 INFO L226 Difference]: Without dead ends: 2157 [2022-01-18 05:26:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:26:53,153 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 329 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:53,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 333 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-01-18 05:26:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1698. [2022-01-18 05:26:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 4.342958161461403) internal successors, (7370), 1697 states have internal predecessors, (7370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 7370 transitions. [2022-01-18 05:26:53,189 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 7370 transitions. Word has length 29 [2022-01-18 05:26:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:53,189 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 7370 transitions. [2022-01-18 05:26:53,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:26:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 7370 transitions. [2022-01-18 05:26:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:53,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:53,194 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] [2022-01-18 05:26:53,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:53,416 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,SelfDestructingSolverStorable34 [2022-01-18 05:26:53,416 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 108447743, now seen corresponding path program 16 times [2022-01-18 05:26:53,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462582747] [2022-01-18 05:26:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:53,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:53,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462582747] [2022-01-18 05:26:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462582747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433960131] [2022-01-18 05:26:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:53,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:53,523 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) [2022-01-18 05:26:53,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:26:53,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:53,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:53,768 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 19 treesize of output 11 [2022-01-18 05:26:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:53,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:53,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:53,987 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 17 treesize of output 22 [2022-01-18 05:26:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:53,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:54,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433960131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:54,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:54,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:54,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6040948] [2022-01-18 05:26:54,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:54,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:54,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:54,073 INFO L87 Difference]: Start difference. First operand 1698 states and 7370 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:54,887 INFO L93 Difference]: Finished difference Result 2754 states and 11325 transitions. [2022-01-18 05:26:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:54,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:54,894 INFO L225 Difference]: With dead ends: 2754 [2022-01-18 05:26:54,894 INFO L226 Difference]: Without dead ends: 2726 [2022-01-18 05:26:54,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:26:54,895 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 381 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:54,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 472 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-01-18 05:26:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1807. [2022-01-18 05:26:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 4.377630121816169) internal successors, (7906), 1806 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 7906 transitions. [2022-01-18 05:26:54,929 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 7906 transitions. Word has length 29 [2022-01-18 05:26:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:54,929 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 7906 transitions. [2022-01-18 05:26:54,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 7906 transitions. [2022-01-18 05:26:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:54,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:54,933 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] [2022-01-18 05:26:54,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 05:26:55,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 05:26:55,133 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash 55061223, now seen corresponding path program 17 times [2022-01-18 05:26:55,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:55,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801983771] [2022-01-18 05:26:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:55,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:55,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:55,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801983771] [2022-01-18 05:26:55,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801983771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:55,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921416068] [2022-01-18 05:26:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:55,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:55,224 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) [2022-01-18 05:26:55,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:26:55,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:55,434 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 19 treesize of output 11 [2022-01-18 05:26:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:55,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:55,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:55,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:55,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:26:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:55,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921416068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:55,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:55,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:26:55,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142056356] [2022-01-18 05:26:55,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:55,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:55,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:55,731 INFO L87 Difference]: Start difference. First operand 1807 states and 7906 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:56,538 INFO L93 Difference]: Finished difference Result 2761 states and 11342 transitions. [2022-01-18 05:26:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:26:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:26:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:56,544 INFO L225 Difference]: With dead ends: 2761 [2022-01-18 05:26:56,544 INFO L226 Difference]: Without dead ends: 2728 [2022-01-18 05:26:56,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:26:56,545 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 383 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:56,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 455 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:26:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-01-18 05:26:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1767. [2022-01-18 05:26:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.377689694224236) internal successors, (7731), 1766 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7731 transitions. [2022-01-18 05:26:56,576 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7731 transitions. Word has length 29 [2022-01-18 05:26:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:56,576 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7731 transitions. [2022-01-18 05:26:56,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7731 transitions. [2022-01-18 05:26:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:56,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:56,581 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] [2022-01-18 05:26:56,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 05:26:56,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:56,794 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2117890319, now seen corresponding path program 18 times [2022-01-18 05:26:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988430] [2022-01-18 05:26:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:56,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:56,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988430] [2022-01-18 05:26:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848905170] [2022-01-18 05:26:56,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:56,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:56,920 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) [2022-01-18 05:26:56,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:26:56,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:26:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:57,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:57,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:26:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:57,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848905170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:57,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:57,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:26:57,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972921352] [2022-01-18 05:26:57,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:26:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:26:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:57,566 INFO L87 Difference]: Start difference. First operand 1767 states and 7731 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:26:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:58,073 INFO L93 Difference]: Finished difference Result 2094 states and 8952 transitions. [2022-01-18 05:26:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-01-18 05:26:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:58,078 INFO L225 Difference]: With dead ends: 2094 [2022-01-18 05:26:58,078 INFO L226 Difference]: Without dead ends: 2079 [2022-01-18 05:26:58,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:26:58,079 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:58,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 319 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:26:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-01-18 05:26:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1755. [2022-01-18 05:26:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 4.379703534777651) internal successors, (7682), 1754 states have internal predecessors, (7682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 7682 transitions. [2022-01-18 05:26:58,106 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 7682 transitions. Word has length 29 [2022-01-18 05:26:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:58,106 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 7682 transitions. [2022-01-18 05:26:58,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:26:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 7682 transitions. [2022-01-18 05:26:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:26:58,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:58,110 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] [2022-01-18 05:26:58,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:58,312 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,SelfDestructingSolverStorable37 [2022-01-18 05:26:58,312 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:26:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash -101621211, now seen corresponding path program 19 times [2022-01-18 05:26:58,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:58,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682692824] [2022-01-18 05:26:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:58,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:58,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:58,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682692824] [2022-01-18 05:26:58,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682692824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:58,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726955202] [2022-01-18 05:26:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:58,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:58,428 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) [2022-01-18 05:26:58,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:26:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:26:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:58,743 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 19 treesize of output 11 [2022-01-18 05:26:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:58,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:58,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:26:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:58,962 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:26:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726955202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:59,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:59,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:26:59,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838234206] [2022-01-18 05:26:59,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:59,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:59,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:59,027 INFO L87 Difference]: Start difference. First operand 1755 states and 7682 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:00,047 INFO L93 Difference]: Finished difference Result 2126 states and 9072 transitions. [2022-01-18 05:27:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:00,053 INFO L225 Difference]: With dead ends: 2126 [2022-01-18 05:27:00,053 INFO L226 Difference]: Without dead ends: 2111 [2022-01-18 05:27:00,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:00,053 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 520 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-01-18 05:27:00,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1767. [2022-01-18 05:27:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.36806342015855) internal successors, (7714), 1766 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7714 transitions. [2022-01-18 05:27:00,079 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7714 transitions. Word has length 29 [2022-01-18 05:27:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:00,079 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7714 transitions. [2022-01-18 05:27:00,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7714 transitions. [2022-01-18 05:27:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:00,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:00,082 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] [2022-01-18 05:27:00,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 05:27:00,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 05:27:00,283 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 332408135, now seen corresponding path program 20 times [2022-01-18 05:27:00,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:00,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071457113] [2022-01-18 05:27:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:00,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:00,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071457113] [2022-01-18 05:27:00,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071457113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075176598] [2022-01-18 05:27:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:00,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:00,387 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) [2022-01-18 05:27:00,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:27:00,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:00,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:00,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:00,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:01,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075176598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:01,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:01,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:27:01,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841164099] [2022-01-18 05:27:01,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:01,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:01,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:01,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:01,018 INFO L87 Difference]: Start difference. First operand 1767 states and 7714 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) 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) [2022-01-18 05:27:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:01,685 INFO L93 Difference]: Finished difference Result 2191 states and 9154 transitions. [2022-01-18 05:27:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:27:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) 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 29 [2022-01-18 05:27:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:01,690 INFO L225 Difference]: With dead ends: 2191 [2022-01-18 05:27:01,690 INFO L226 Difference]: Without dead ends: 2176 [2022-01-18 05:27:01,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:27:01,691 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 265 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:01,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 359 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-01-18 05:27:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1764. [2022-01-18 05:27:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 4.3698241633579125) internal successors, (7704), 1763 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 7704 transitions. [2022-01-18 05:27:01,722 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 7704 transitions. Word has length 29 [2022-01-18 05:27:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 7704 transitions. [2022-01-18 05:27:01,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) 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) [2022-01-18 05:27:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 7704 transitions. [2022-01-18 05:27:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:01,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:01,727 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] [2022-01-18 05:27:01,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:01,938 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,SelfDestructingSolverStorable39 [2022-01-18 05:27:01,938 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash 754462757, now seen corresponding path program 21 times [2022-01-18 05:27:01,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124930709] [2022-01-18 05:27:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:02,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124930709] [2022-01-18 05:27:02,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124930709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733382675] [2022-01-18 05:27:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:02,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:02,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:02,049 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) [2022-01-18 05:27:02,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:27:02,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:02,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:02,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:02,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:02,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733382675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:02,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:02,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129905824] [2022-01-18 05:27:02,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:02,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:02,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:02,577 INFO L87 Difference]: Start difference. First operand 1764 states and 7704 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:27:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:03,200 INFO L93 Difference]: Finished difference Result 2126 states and 9065 transitions. [2022-01-18 05:27:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 29 [2022-01-18 05:27:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:03,206 INFO L225 Difference]: With dead ends: 2126 [2022-01-18 05:27:03,206 INFO L226 Difference]: Without dead ends: 2107 [2022-01-18 05:27:03,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:27:03,206 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:03,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 320 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-01-18 05:27:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1794. [2022-01-18 05:27:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.37590630228667) internal successors, (7846), 1793 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7846 transitions. [2022-01-18 05:27:03,232 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7846 transitions. Word has length 29 [2022-01-18 05:27:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:03,232 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 7846 transitions. [2022-01-18 05:27:03,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:27:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7846 transitions. [2022-01-18 05:27:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:03,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:03,235 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] [2022-01-18 05:27:03,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 05:27:03,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:03,437 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2057735363, now seen corresponding path program 22 times [2022-01-18 05:27:03,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258605480] [2022-01-18 05:27:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:03,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:03,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258605480] [2022-01-18 05:27:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258605480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774562228] [2022-01-18 05:27:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:03,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:03,551 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) [2022-01-18 05:27:03,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:27:03,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:03,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:03,747 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 15 treesize of output 7 [2022-01-18 05:27:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:03,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:03,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:03,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:03,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:04,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774562228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:04,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:04,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:04,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357230561] [2022-01-18 05:27:04,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:04,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:04,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:04,058 INFO L87 Difference]: Start difference. First operand 1794 states and 7846 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:04,838 INFO L93 Difference]: Finished difference Result 2562 states and 10721 transitions. [2022-01-18 05:27:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:27:04,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:04,846 INFO L225 Difference]: With dead ends: 2562 [2022-01-18 05:27:04,846 INFO L226 Difference]: Without dead ends: 2534 [2022-01-18 05:27:04,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:27:04,847 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:04,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 415 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2022-01-18 05:27:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1885. [2022-01-18 05:27:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 4.397027600849257) internal successors, (8284), 1884 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) [2022-01-18 05:27:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8284 transitions. [2022-01-18 05:27:04,886 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8284 transitions. Word has length 29 [2022-01-18 05:27:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:04,887 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 8284 transitions. [2022-01-18 05:27:04,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8284 transitions. [2022-01-18 05:27:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:04,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:04,890 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] [2022-01-18 05:27:04,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 05:27:05,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:05,091 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2004348843, now seen corresponding path program 23 times [2022-01-18 05:27:05,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:05,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923575641] [2022-01-18 05:27:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:05,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923575641] [2022-01-18 05:27:05,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923575641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277790407] [2022-01-18 05:27:05,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:05,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:05,199 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) [2022-01-18 05:27:05,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:27:05,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:05,389 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 15 treesize of output 7 [2022-01-18 05:27:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:05,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:05,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:05,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:05,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277790407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:05,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:05,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:05,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426600813] [2022-01-18 05:27:05,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:05,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:05,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:05,696 INFO L87 Difference]: Start difference. First operand 1885 states and 8284 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:06,445 INFO L93 Difference]: Finished difference Result 2569 states and 10738 transitions. [2022-01-18 05:27:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:06,452 INFO L225 Difference]: With dead ends: 2569 [2022-01-18 05:27:06,452 INFO L226 Difference]: Without dead ends: 2536 [2022-01-18 05:27:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:27:06,452 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 400 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:06,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 355 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-01-18 05:27:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1824. [2022-01-18 05:27:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 4.393307734503566) internal successors, (8009), 1823 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 8009 transitions. [2022-01-18 05:27:06,483 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 8009 transitions. Word has length 29 [2022-01-18 05:27:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:06,484 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 8009 transitions. [2022-01-18 05:27:06,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 8009 transitions. [2022-01-18 05:27:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:06,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:06,488 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] [2022-01-18 05:27:06,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 05:27:06,688 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,SelfDestructingSolverStorable42 [2022-01-18 05:27:06,688 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash -227789357, now seen corresponding path program 24 times [2022-01-18 05:27:06,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:06,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264648129] [2022-01-18 05:27:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:06,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:06,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264648129] [2022-01-18 05:27:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264648129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747249594] [2022-01-18 05:27:06,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:06,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:06,816 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) [2022-01-18 05:27:06,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:27:06,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:06,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:06,982 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 05:27:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747249594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:07,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:07,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:07,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313626201] [2022-01-18 05:27:07,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:07,381 INFO L87 Difference]: Start difference. First operand 1824 states and 8009 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:07,931 INFO L93 Difference]: Finished difference Result 1999 states and 8662 transitions. [2022-01-18 05:27:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:27:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:07,936 INFO L225 Difference]: With dead ends: 1999 [2022-01-18 05:27:07,936 INFO L226 Difference]: Without dead ends: 1984 [2022-01-18 05:27:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:27:07,936 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 125 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:07,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 343 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-01-18 05:27:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1809. [2022-01-18 05:27:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 4.397123893805309) internal successors, (7950), 1808 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 7950 transitions. [2022-01-18 05:27:07,964 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 7950 transitions. Word has length 29 [2022-01-18 05:27:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:07,965 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 7950 transitions. [2022-01-18 05:27:07,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 7950 transitions. [2022-01-18 05:27:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:07,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:07,969 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] [2022-01-18 05:27:07,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 05:27:08,186 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,SelfDestructingSolverStorable43 [2022-01-18 05:27:08,186 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1276561759, now seen corresponding path program 25 times [2022-01-18 05:27:08,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:08,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991970426] [2022-01-18 05:27:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:08,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:08,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991970426] [2022-01-18 05:27:08,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991970426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:08,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054608116] [2022-01-18 05:27:08,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:08,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:08,316 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) [2022-01-18 05:27:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:27:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:08,539 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 15 treesize of output 7 [2022-01-18 05:27:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:08,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:08,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:08,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054608116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:08,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:08,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:27:08,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511561102] [2022-01-18 05:27:08,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:08,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:08,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:08,882 INFO L87 Difference]: Start difference. First operand 1809 states and 7950 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:09,795 INFO L93 Difference]: Finished difference Result 2655 states and 11037 transitions. [2022-01-18 05:27:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:27:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:09,801 INFO L225 Difference]: With dead ends: 2655 [2022-01-18 05:27:09,801 INFO L226 Difference]: Without dead ends: 2617 [2022-01-18 05:27:09,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:09,802 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 601 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:09,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 403 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2022-01-18 05:27:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 1921. [2022-01-18 05:27:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.422395833333334) internal successors, (8491), 1920 states have internal predecessors, (8491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8491 transitions. [2022-01-18 05:27:09,849 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8491 transitions. Word has length 29 [2022-01-18 05:27:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:09,849 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8491 transitions. [2022-01-18 05:27:09,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8491 transitions. [2022-01-18 05:27:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:09,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:09,855 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] [2022-01-18 05:27:09,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:10,061 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,SelfDestructingSolverStorable44 [2022-01-18 05:27:10,061 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 26710847, now seen corresponding path program 26 times [2022-01-18 05:27:10,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:10,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460971755] [2022-01-18 05:27:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:10,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:10,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460971755] [2022-01-18 05:27:10,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460971755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:10,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777888751] [2022-01-18 05:27:10,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:10,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:10,164 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) [2022-01-18 05:27:10,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:27:10,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:10,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:10,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:10,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:10,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777888751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:10,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:10,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:27:10,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200998731] [2022-01-18 05:27:10,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:10,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:10,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:10,672 INFO L87 Difference]: Start difference. First operand 1921 states and 8491 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:11,236 INFO L93 Difference]: Finished difference Result 2244 states and 9582 transitions. [2022-01-18 05:27:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:11,241 INFO L225 Difference]: With dead ends: 2244 [2022-01-18 05:27:11,241 INFO L226 Difference]: Without dead ends: 2231 [2022-01-18 05:27:11,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:27:11,242 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:11,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 310 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-01-18 05:27:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1921. [2022-01-18 05:27:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.420833333333333) internal successors, (8488), 1920 states have internal predecessors, (8488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8488 transitions. [2022-01-18 05:27:11,273 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8488 transitions. Word has length 29 [2022-01-18 05:27:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:11,273 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8488 transitions. [2022-01-18 05:27:11,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8488 transitions. [2022-01-18 05:27:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:11,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:11,277 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] [2022-01-18 05:27:11,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 05:27:11,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 05:27:11,478 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash -872651225, now seen corresponding path program 27 times [2022-01-18 05:27:11,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029792045] [2022-01-18 05:27:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:11,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:11,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029792045] [2022-01-18 05:27:11,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029792045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244012739] [2022-01-18 05:27:11,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:11,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:11,603 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) [2022-01-18 05:27:11,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:27:11,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:11,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:11,768 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 11 treesize of output 15 [2022-01-18 05:27:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:11,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244012739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:12,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:12,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:12,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184053581] [2022-01-18 05:27:12,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:12,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:12,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:12,126 INFO L87 Difference]: Start difference. First operand 1921 states and 8488 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:12,759 INFO L93 Difference]: Finished difference Result 2209 states and 9500 transitions. [2022-01-18 05:27:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:27:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:27:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:12,765 INFO L225 Difference]: With dead ends: 2209 [2022-01-18 05:27:12,765 INFO L226 Difference]: Without dead ends: 2181 [2022-01-18 05:27:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:27:12,765 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:12,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 316 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-01-18 05:27:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1881. [2022-01-18 05:27:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-01-18 05:27:12,817 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-01-18 05:27:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:12,817 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-01-18 05:27:12,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-01-18 05:27:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:12,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:12,820 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, 1, 1, 1] [2022-01-18 05:27:12,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 05:27:13,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:13,021 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash -757329439, now seen corresponding path program 28 times [2022-01-18 05:27:13,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:13,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830082512] [2022-01-18 05:27:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:13,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:13,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:13,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830082512] [2022-01-18 05:27:13,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830082512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:13,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140570159] [2022-01-18 05:27:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:13,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:13,156 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) [2022-01-18 05:27:13,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:27:13,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:13,382 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 15 treesize of output 7 [2022-01-18 05:27:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:13,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:13,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:13,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:13,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140570159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:13,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:13,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:13,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366904162] [2022-01-18 05:27:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:13,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:13,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:13,725 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:14,786 INFO L93 Difference]: Finished difference Result 2425 states and 10268 transitions. [2022-01-18 05:27:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:27:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:14,791 INFO L225 Difference]: With dead ends: 2425 [2022-01-18 05:27:14,792 INFO L226 Difference]: Without dead ends: 2387 [2022-01-18 05:27:14,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:27:14,793 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 384 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:14,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 520 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:27:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-01-18 05:27:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1881. [2022-01-18 05:27:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-01-18 05:27:14,835 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-01-18 05:27:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:14,836 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-01-18 05:27:14,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-01-18 05:27:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:14,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:14,840 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] [2022-01-18 05:27:14,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:15,060 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,SelfDestructingSolverStorable47 [2022-01-18 05:27:15,060 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1692151869, now seen corresponding path program 29 times [2022-01-18 05:27:15,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:15,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403813331] [2022-01-18 05:27:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:15,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403813331] [2022-01-18 05:27:15,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403813331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841476939] [2022-01-18 05:27:15,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:15,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:15,166 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) [2022-01-18 05:27:15,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:27:15,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:27:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:15,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 treesize of output 7 [2022-01-18 05:27:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:15,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:15,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:15,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841476939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:15,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:15,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-01-18 05:27:15,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720249095] [2022-01-18 05:27:15,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:15,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:15,727 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:16,660 INFO L93 Difference]: Finished difference Result 2447 states and 10393 transitions. [2022-01-18 05:27:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:27:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:16,666 INFO L225 Difference]: With dead ends: 2447 [2022-01-18 05:27:16,666 INFO L226 Difference]: Without dead ends: 2425 [2022-01-18 05:27:16,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:27:16,667 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:16,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 438 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-01-18 05:27:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1869. [2022-01-18 05:27:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 4.423982869379015) internal successors, (8264), 1868 states have internal predecessors, (8264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 8264 transitions. [2022-01-18 05:27:16,696 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 8264 transitions. Word has length 29 [2022-01-18 05:27:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 8264 transitions. [2022-01-18 05:27:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 8264 transitions. [2022-01-18 05:27:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:16,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:16,699 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] [2022-01-18 05:27:16,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 05:27:16,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 05:27:16,900 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -285338559, now seen corresponding path program 15 times [2022-01-18 05:27:16,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548001960] [2022-01-18 05:27:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:16,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:17,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548001960] [2022-01-18 05:27:17,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548001960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804718653] [2022-01-18 05:27:17,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:17,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:17,026 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) [2022-01-18 05:27:17,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:27:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:17,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:17,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:17,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:17,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:17,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804718653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:17,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:17,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:17,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991433311] [2022-01-18 05:27:17,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:17,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:17,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:17,653 INFO L87 Difference]: Start difference. First operand 1869 states and 8264 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:18,327 INFO L93 Difference]: Finished difference Result 2494 states and 10689 transitions. [2022-01-18 05:27:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:18,333 INFO L225 Difference]: With dead ends: 2494 [2022-01-18 05:27:18,333 INFO L226 Difference]: Without dead ends: 2475 [2022-01-18 05:27:18,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:27:18,333 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 357 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:18,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 360 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-01-18 05:27:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1968. [2022-01-18 05:27:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 4.427046263345196) internal successors, (8708), 1967 states have internal predecessors, (8708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 8708 transitions. [2022-01-18 05:27:18,363 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 8708 transitions. Word has length 29 [2022-01-18 05:27:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:18,363 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 8708 transitions. [2022-01-18 05:27:18,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 8708 transitions. [2022-01-18 05:27:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:18,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:18,366 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] [2022-01-18 05:27:18,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 05:27:18,567 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,SelfDestructingSolverStorable49 [2022-01-18 05:27:18,567 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1137016267, now seen corresponding path program 16 times [2022-01-18 05:27:18,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221631917] [2022-01-18 05:27:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:18,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:18,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221631917] [2022-01-18 05:27:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221631917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738213525] [2022-01-18 05:27:18,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:18,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:18,674 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) [2022-01-18 05:27:18,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:27:18,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:18,873 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 19 treesize of output 11 [2022-01-18 05:27:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:18,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:19,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:19,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:19,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:19,111 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 17 treesize of output 7 [2022-01-18 05:27:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:19,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738213525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:19,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:19,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:19,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011279900] [2022-01-18 05:27:19,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:19,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:19,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:19,164 INFO L87 Difference]: Start difference. First operand 1968 states and 8708 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:19,971 INFO L93 Difference]: Finished difference Result 3178 states and 13290 transitions. [2022-01-18 05:27:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:19,979 INFO L225 Difference]: With dead ends: 3178 [2022-01-18 05:27:19,979 INFO L226 Difference]: Without dead ends: 3150 [2022-01-18 05:27:19,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:27:19,980 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 498 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:19,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 466 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-01-18 05:27:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2117. [2022-01-18 05:27:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 4.453213610586011) internal successors, (9423), 2116 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9423 transitions. [2022-01-18 05:27:20,044 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9423 transitions. Word has length 29 [2022-01-18 05:27:20,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:20,045 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 9423 transitions. [2022-01-18 05:27:20,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9423 transitions. [2022-01-18 05:27:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:20,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:20,049 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] [2022-01-18 05:27:20,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:20,249 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1537889799, now seen corresponding path program 17 times [2022-01-18 05:27:20,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:20,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662593106] [2022-01-18 05:27:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:20,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662593106] [2022-01-18 05:27:20,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662593106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019095682] [2022-01-18 05:27:20,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:20,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:20,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:20,352 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) [2022-01-18 05:27:20,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:27:20,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:20,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:20,567 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 19 treesize of output 11 [2022-01-18 05:27:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:20,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:20,786 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 17 treesize of output 22 [2022-01-18 05:27:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:20,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019095682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:20,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:20,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:20,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372714717] [2022-01-18 05:27:20,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:20,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:20,846 INFO L87 Difference]: Start difference. First operand 2117 states and 9423 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:21,614 INFO L93 Difference]: Finished difference Result 3185 states and 13307 transitions. [2022-01-18 05:27:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:21,622 INFO L225 Difference]: With dead ends: 3185 [2022-01-18 05:27:21,622 INFO L226 Difference]: Without dead ends: 3152 [2022-01-18 05:27:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:27:21,623 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 501 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:21,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 431 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-01-18 05:27:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2007. [2022-01-18 05:27:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.436689930209372) internal successors, (8900), 2006 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8900 transitions. [2022-01-18 05:27:21,659 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8900 transitions. Word has length 29 [2022-01-18 05:27:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:21,659 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8900 transitions. [2022-01-18 05:27:21,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8900 transitions. [2022-01-18 05:27:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:21,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:21,663 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] [2022-01-18 05:27:21,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:21,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:21,864 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1175894491, now seen corresponding path program 18 times [2022-01-18 05:27:21,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825534584] [2022-01-18 05:27:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:21,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:21,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825534584] [2022-01-18 05:27:21,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825534584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858570417] [2022-01-18 05:27:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:21,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:21,980 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) [2022-01-18 05:27:21,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:27:22,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:22,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:22,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:22,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:22,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858570417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:22,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:22,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:22,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112734586] [2022-01-18 05:27:22,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:22,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:22,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:22,534 INFO L87 Difference]: Start difference. First operand 2007 states and 8900 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:27:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:23,066 INFO L93 Difference]: Finished difference Result 2343 states and 10168 transitions. [2022-01-18 05:27:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-01-18 05:27:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:23,072 INFO L225 Difference]: With dead ends: 2343 [2022-01-18 05:27:23,072 INFO L226 Difference]: Without dead ends: 2328 [2022-01-18 05:27:23,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:27:23,073 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:23,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 333 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-01-18 05:27:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1989. [2022-01-18 05:27:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-01-18 05:27:23,108 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-01-18 05:27:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:23,108 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-01-18 05:27:23,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:27:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-01-18 05:27:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:23,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:23,112 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, 1, 1, 1] [2022-01-18 05:27:23,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:23,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:23,313 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1539061893, now seen corresponding path program 19 times [2022-01-18 05:27:23,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:23,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044437198] [2022-01-18 05:27:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:23,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:23,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044437198] [2022-01-18 05:27:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044437198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:23,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380109526] [2022-01-18 05:27:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:23,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:23,410 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) [2022-01-18 05:27:23,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:27:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:23,671 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 19 treesize of output 11 [2022-01-18 05:27:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:23,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:23,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:23,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380109526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:23,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:23,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:23,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38117426] [2022-01-18 05:27:23,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:23,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:23,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:23,940 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:24,955 INFO L93 Difference]: Finished difference Result 2370 states and 10258 transitions. [2022-01-18 05:27:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:24,961 INFO L225 Difference]: With dead ends: 2370 [2022-01-18 05:27:24,961 INFO L226 Difference]: Without dead ends: 2355 [2022-01-18 05:27:24,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:24,961 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:24,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 482 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-18 05:27:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1989. [2022-01-18 05:27:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-01-18 05:27:24,990 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-01-18 05:27:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:24,990 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-01-18 05:27:24,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-01-18 05:27:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:24,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:24,993 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] [2022-01-18 05:27:25,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:25,193 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,SelfDestructingSolverStorable53 [2022-01-18 05:27:25,194 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1973091239, now seen corresponding path program 20 times [2022-01-18 05:27:25,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292561829] [2022-01-18 05:27:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:25,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292561829] [2022-01-18 05:27:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292561829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460026304] [2022-01-18 05:27:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:25,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:25,308 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) [2022-01-18 05:27:25,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:27:25,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:25,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:25,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:25,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:25,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460026304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:25,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:25,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:27:25,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447134077] [2022-01-18 05:27:25,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:25,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:25,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:25,857 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2022-01-18 05:27:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:26,529 INFO L93 Difference]: Finished difference Result 2428 states and 10312 transitions. [2022-01-18 05:27:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:27:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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 29 [2022-01-18 05:27:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:26,535 INFO L225 Difference]: With dead ends: 2428 [2022-01-18 05:27:26,535 INFO L226 Difference]: Without dead ends: 2413 [2022-01-18 05:27:26,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:27:26,535 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 246 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:26,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 393 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-01-18 05:27:26,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1962. [2022-01-18 05:27:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 4.448750637429883) internal successors, (8724), 1961 states have internal predecessors, (8724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 8724 transitions. [2022-01-18 05:27:26,568 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 8724 transitions. Word has length 29 [2022-01-18 05:27:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:26,568 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 8724 transitions. [2022-01-18 05:27:26,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2022-01-18 05:27:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 8724 transitions. [2022-01-18 05:27:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:26,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:26,572 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] [2022-01-18 05:27:26,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 05:27:26,772 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,SelfDestructingSolverStorable54 [2022-01-18 05:27:26,772 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2139067589, now seen corresponding path program 21 times [2022-01-18 05:27:26,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:26,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430847085] [2022-01-18 05:27:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:26,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:26,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430847085] [2022-01-18 05:27:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430847085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888502772] [2022-01-18 05:27:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:26,890 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) [2022-01-18 05:27:26,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:27:26,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:26,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:27,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:27,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:27,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888502772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:27,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:27,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:27,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557687995] [2022-01-18 05:27:27,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:27,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:27,430 INFO L87 Difference]: Start difference. First operand 1962 states and 8724 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:27:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:28,088 INFO L93 Difference]: Finished difference Result 2348 states and 10185 transitions. [2022-01-18 05:27:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 29 [2022-01-18 05:27:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:28,094 INFO L225 Difference]: With dead ends: 2348 [2022-01-18 05:27:28,094 INFO L226 Difference]: Without dead ends: 2329 [2022-01-18 05:27:28,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:27:28,095 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 281 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:28,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 333 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-01-18 05:27:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1998. [2022-01-18 05:27:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 4.451176765147721) internal successors, (8889), 1997 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 8889 transitions. [2022-01-18 05:27:28,124 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 8889 transitions. Word has length 29 [2022-01-18 05:27:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:28,124 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 8889 transitions. [2022-01-18 05:27:28,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:27:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 8889 transitions. [2022-01-18 05:27:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:28,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:28,127 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] [2022-01-18 05:27:28,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:28,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 05:27:28,328 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash -733544881, now seen corresponding path program 22 times [2022-01-18 05:27:28,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:28,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551196702] [2022-01-18 05:27:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:28,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551196702] [2022-01-18 05:27:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551196702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14891428] [2022-01-18 05:27:28,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:28,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:28,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:28,440 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) [2022-01-18 05:27:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:27:28,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:28,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:28,642 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 15 treesize of output 7 [2022-01-18 05:27:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:28,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:28,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:28,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14891428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:28,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:28,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:28,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445941335] [2022-01-18 05:27:28,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:28,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:28,985 INFO L87 Difference]: Start difference. First operand 1998 states and 8889 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:29,893 INFO L93 Difference]: Finished difference Result 2888 states and 12212 transitions. [2022-01-18 05:27:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:27:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:29,899 INFO L225 Difference]: With dead ends: 2888 [2022-01-18 05:27:29,899 INFO L226 Difference]: Without dead ends: 2860 [2022-01-18 05:27:29,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:27:29,902 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 337 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:29,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 422 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-01-18 05:27:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2123. [2022-01-18 05:27:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 4.463242224316683) internal successors, (9471), 2122 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9471 transitions. [2022-01-18 05:27:29,938 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9471 transitions. Word has length 29 [2022-01-18 05:27:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:29,938 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 9471 transitions. [2022-01-18 05:27:29,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9471 transitions. [2022-01-18 05:27:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:29,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:29,941 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] [2022-01-18 05:27:29,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 05:27:30,142 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,SelfDestructingSolverStorable56 [2022-01-18 05:27:30,142 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash -332671349, now seen corresponding path program 23 times [2022-01-18 05:27:30,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224846075] [2022-01-18 05:27:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:30,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:30,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:30,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224846075] [2022-01-18 05:27:30,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224846075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:30,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788031925] [2022-01-18 05:27:30,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:30,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:30,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:30,254 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) [2022-01-18 05:27:30,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 05:27:30,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:30,418 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 15 treesize of output 7 [2022-01-18 05:27:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:30,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:30,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:30,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:30,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788031925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:30,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:30,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:30,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446795242] [2022-01-18 05:27:30,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:30,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:30,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:30,745 INFO L87 Difference]: Start difference. First operand 2123 states and 9471 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:31,505 INFO L93 Difference]: Finished difference Result 2895 states and 12229 transitions. [2022-01-18 05:27:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:31,512 INFO L225 Difference]: With dead ends: 2895 [2022-01-18 05:27:31,512 INFO L226 Difference]: Without dead ends: 2862 [2022-01-18 05:27:31,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:27:31,512 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 335 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:31,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 388 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2022-01-18 05:27:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2028. [2022-01-18 05:27:31,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 4.461272816970893) internal successors, (9043), 2027 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9043 transitions. [2022-01-18 05:27:31,563 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9043 transitions. Word has length 29 [2022-01-18 05:27:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 9043 transitions. [2022-01-18 05:27:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9043 transitions. [2022-01-18 05:27:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:31,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:31,566 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] [2022-01-18 05:27:31,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 05:27:31,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 05:27:31,767 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -694666657, now seen corresponding path program 24 times [2022-01-18 05:27:31,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930158256] [2022-01-18 05:27:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:31,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:31,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930158256] [2022-01-18 05:27:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930158256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252696602] [2022-01-18 05:27:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:31,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:31,910 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) [2022-01-18 05:27:31,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 05:27:31,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:32,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:32,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:32,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:32,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252696602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:32,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:32,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:32,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439830787] [2022-01-18 05:27:32,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:32,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:32,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:32,501 INFO L87 Difference]: Start difference. First operand 2028 states and 9043 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:33,101 INFO L93 Difference]: Finished difference Result 2182 states and 9610 transitions. [2022-01-18 05:27:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:27:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:33,106 INFO L225 Difference]: With dead ends: 2182 [2022-01-18 05:27:33,106 INFO L226 Difference]: Without dead ends: 2167 [2022-01-18 05:27:33,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:27:33,107 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:33,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 387 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-01-18 05:27:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2007. [2022-01-18 05:27:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.464107676969093) internal successors, (8955), 2006 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8955 transitions. [2022-01-18 05:27:33,134 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8955 transitions. Word has length 29 [2022-01-18 05:27:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:33,134 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8955 transitions. [2022-01-18 05:27:33,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8955 transitions. [2022-01-18 05:27:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:33,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:33,138 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] [2022-01-18 05:27:33,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:33,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 05:27:33,338 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:33,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2058717311, now seen corresponding path program 25 times [2022-01-18 05:27:33,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:33,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915345297] [2022-01-18 05:27:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:33,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915345297] [2022-01-18 05:27:33,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915345297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974633673] [2022-01-18 05:27:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:33,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:33,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:33,459 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) [2022-01-18 05:27:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 05:27:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:33,632 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 15 treesize of output 7 [2022-01-18 05:27:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:33,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:33,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 05:27:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:33,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974633673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:33,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:33,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:27:33,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546514479] [2022-01-18 05:27:33,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:33,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:33,961 INFO L87 Difference]: Start difference. First operand 2007 states and 8955 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:34,872 INFO L93 Difference]: Finished difference Result 2978 states and 12458 transitions. [2022-01-18 05:27:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:27:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:34,879 INFO L225 Difference]: With dead ends: 2978 [2022-01-18 05:27:34,879 INFO L226 Difference]: Without dead ends: 2940 [2022-01-18 05:27:34,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:34,880 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 522 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:34,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 424 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-01-18 05:27:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2133. [2022-01-18 05:27:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.473264540337711) internal successors, (9537), 2132 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9537 transitions. [2022-01-18 05:27:34,916 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9537 transitions. Word has length 29 [2022-01-18 05:27:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9537 transitions. [2022-01-18 05:27:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9537 transitions. [2022-01-18 05:27:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:34,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:34,920 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] [2022-01-18 05:27:34,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 05:27:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:35,123 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash -636362485, now seen corresponding path program 26 times [2022-01-18 05:27:35,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:35,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139888982] [2022-01-18 05:27:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:35,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139888982] [2022-01-18 05:27:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139888982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650512262] [2022-01-18 05:27:35,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:35,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:35,221 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) [2022-01-18 05:27:35,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 05:27:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:35,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:35,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 05:27:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650512262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:35,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:35,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:27:35,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261516817] [2022-01-18 05:27:35,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:35,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:35,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:35,723 INFO L87 Difference]: Start difference. First operand 2133 states and 9537 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:36,235 INFO L93 Difference]: Finished difference Result 2472 states and 10662 transitions. [2022-01-18 05:27:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:36,241 INFO L225 Difference]: With dead ends: 2472 [2022-01-18 05:27:36,241 INFO L226 Difference]: Without dead ends: 2459 [2022-01-18 05:27:36,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:27:36,241 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 352 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:36,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 281 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-01-18 05:27:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2133. [2022-01-18 05:27:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.471857410881801) internal successors, (9534), 2132 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9534 transitions. [2022-01-18 05:27:36,272 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9534 transitions. Word has length 29 [2022-01-18 05:27:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:36,272 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9534 transitions. [2022-01-18 05:27:36,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9534 transitions. [2022-01-18 05:27:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:36,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:36,276 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, 1, 1, 1] [2022-01-18 05:27:36,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:36,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:36,476 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1081464505, now seen corresponding path program 27 times [2022-01-18 05:27:36,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449897104] [2022-01-18 05:27:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:36,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:36,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449897104] [2022-01-18 05:27:36,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449897104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:36,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470220803] [2022-01-18 05:27:36,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:36,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:36,609 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) [2022-01-18 05:27:36,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 05:27:36,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:36,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:36,754 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 11 treesize of output 15 [2022-01-18 05:27:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:36,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470220803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:37,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:37,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:27:37,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512573928] [2022-01-18 05:27:37,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:37,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:37,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:37,143 INFO L87 Difference]: Start difference. First operand 2133 states and 9534 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:37,711 INFO L93 Difference]: Finished difference Result 2427 states and 10549 transitions. [2022-01-18 05:27:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:27:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:27:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:37,717 INFO L225 Difference]: With dead ends: 2427 [2022-01-18 05:27:37,717 INFO L226 Difference]: Without dead ends: 2399 [2022-01-18 05:27:37,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:27:37,718 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 279 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:37,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 280 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2022-01-18 05:27:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2079. [2022-01-18 05:27:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 4.472569778633301) internal successors, (9294), 2078 states have internal predecessors, (9294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 9294 transitions. [2022-01-18 05:27:37,748 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 9294 transitions. Word has length 29 [2022-01-18 05:27:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:37,748 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 9294 transitions. [2022-01-18 05:27:37,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:27:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 9294 transitions. [2022-01-18 05:27:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:37,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:37,752 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] [2022-01-18 05:27:37,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 05:27:37,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:37,952 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 484686529, now seen corresponding path program 28 times [2022-01-18 05:27:37,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:37,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326390028] [2022-01-18 05:27:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:37,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326390028] [2022-01-18 05:27:38,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326390028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112542937] [2022-01-18 05:27:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:38,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:38,084 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) [2022-01-18 05:27:38,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 05:27:38,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:38,271 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 15 treesize of output 7 [2022-01-18 05:27:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:38,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:38,538 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 17 treesize of output 22 [2022-01-18 05:27:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:38,556 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:27:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112542937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:38,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:38,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:38,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528380174] [2022-01-18 05:27:38,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:38,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:38,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:38,623 INFO L87 Difference]: Start difference. First operand 2079 states and 9294 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:39,780 INFO L93 Difference]: Finished difference Result 2708 states and 11522 transitions. [2022-01-18 05:27:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:27:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:39,787 INFO L225 Difference]: With dead ends: 2708 [2022-01-18 05:27:39,788 INFO L226 Difference]: Without dead ends: 2670 [2022-01-18 05:27:39,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:27:39,788 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 376 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:39,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 632 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:27:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-01-18 05:27:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2082. [2022-01-18 05:27:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 4.470446900528592) internal successors, (9303), 2081 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 9303 transitions. [2022-01-18 05:27:39,826 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 9303 transitions. Word has length 29 [2022-01-18 05:27:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:39,826 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 9303 transitions. [2022-01-18 05:27:39,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 9303 transitions. [2022-01-18 05:27:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:39,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:39,829 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] [2022-01-18 05:27:39,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 05:27:40,030 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,SelfDestructingSolverStorable62 [2022-01-18 05:27:40,030 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -838291121, now seen corresponding path program 29 times [2022-01-18 05:27:40,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:40,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22651203] [2022-01-18 05:27:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:40,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22651203] [2022-01-18 05:27:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22651203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195182372] [2022-01-18 05:27:40,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:40,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:40,157 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) [2022-01-18 05:27:40,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 05:27:40,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 05:27:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:40,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:40,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:40,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:40,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:40,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195182372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:40,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:40,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:27:40,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830593163] [2022-01-18 05:27:40,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:40,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:40,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:40,917 INFO L87 Difference]: Start difference. First operand 2082 states and 9303 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:41,694 INFO L93 Difference]: Finished difference Result 2482 states and 10735 transitions. [2022-01-18 05:27:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:27:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:41,702 INFO L225 Difference]: With dead ends: 2482 [2022-01-18 05:27:41,703 INFO L226 Difference]: Without dead ends: 2456 [2022-01-18 05:27:41,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:27:41,703 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:41,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 412 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 807 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-01-18 05:27:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-01-18 05:27:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2114. [2022-01-18 05:27:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.472314245149077) internal successors, (9450), 2113 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9450 transitions. [2022-01-18 05:27:41,747 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9450 transitions. Word has length 29 [2022-01-18 05:27:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:41,747 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 9450 transitions. [2022-01-18 05:27:41,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9450 transitions. [2022-01-18 05:27:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:41,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:41,752 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] [2022-01-18 05:27:41,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:41,972 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,SelfDestructingSolverStorable63 [2022-01-18 05:27:41,972 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1504652747, now seen corresponding path program 30 times [2022-01-18 05:27:41,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:41,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060184155] [2022-01-18 05:27:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:41,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060184155] [2022-01-18 05:27:42,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060184155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748293350] [2022-01-18 05:27:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:42,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:42,075 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) [2022-01-18 05:27:42,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 05:27:42,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:42,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:27:42,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:42,254 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 15 treesize of output 7 [2022-01-18 05:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:42,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:42,520 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 17 treesize of output 22 [2022-01-18 05:27:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:42,533 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:27:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748293350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:42,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:42,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:42,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794539642] [2022-01-18 05:27:42,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:42,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:42,601 INFO L87 Difference]: Start difference. First operand 2114 states and 9450 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:43,439 INFO L93 Difference]: Finished difference Result 2705 states and 11560 transitions. [2022-01-18 05:27:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:27:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:43,445 INFO L225 Difference]: With dead ends: 2705 [2022-01-18 05:27:43,446 INFO L226 Difference]: Without dead ends: 2683 [2022-01-18 05:27:43,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:27:43,446 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 321 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:43,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 381 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-01-18 05:27:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2067. [2022-01-18 05:27:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 4.4767666989351405) internal successors, (9249), 2066 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 9249 transitions. [2022-01-18 05:27:43,478 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 9249 transitions. Word has length 29 [2022-01-18 05:27:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:43,479 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 9249 transitions. [2022-01-18 05:27:43,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 9249 transitions. [2022-01-18 05:27:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:43,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:43,482 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] [2022-01-18 05:27:43,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 05:27:43,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:43,683 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401569, now seen corresponding path program 1 times [2022-01-18 05:27:43,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:43,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463748170] [2022-01-18 05:27:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:43,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:43,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463748170] [2022-01-18 05:27:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463748170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977836037] [2022-01-18 05:27:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:43,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:43,783 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) [2022-01-18 05:27:43,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 05:27:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:43,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:43,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:44,031 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 11 treesize of output 7 [2022-01-18 05:27:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:44,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:44,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:44,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:44,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:44,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:44,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977836037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:44,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:44,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:44,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087461487] [2022-01-18 05:27:44,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:44,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:44,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:44,286 INFO L87 Difference]: Start difference. First operand 2067 states and 9249 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:45,258 INFO L93 Difference]: Finished difference Result 2547 states and 11053 transitions. [2022-01-18 05:27:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:45,264 INFO L225 Difference]: With dead ends: 2547 [2022-01-18 05:27:45,264 INFO L226 Difference]: Without dead ends: 2528 [2022-01-18 05:27:45,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:45,265 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:45,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 427 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-01-18 05:27:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2169. [2022-01-18 05:27:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 4.455719557195572) internal successors, (9660), 2168 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 9660 transitions. [2022-01-18 05:27:45,301 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 9660 transitions. Word has length 29 [2022-01-18 05:27:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:45,301 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 9660 transitions. [2022-01-18 05:27:45,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 9660 transitions. [2022-01-18 05:27:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:45,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:45,306 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] [2022-01-18 05:27:45,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:45,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:45,519 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2037171777, now seen corresponding path program 1 times [2022-01-18 05:27:45,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:45,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228441459] [2022-01-18 05:27:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:45,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:45,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228441459] [2022-01-18 05:27:45,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228441459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:45,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404917545] [2022-01-18 05:27:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:45,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:45,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:45,638 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) [2022-01-18 05:27:45,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 05:27:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:45,863 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 11 treesize of output 7 [2022-01-18 05:27:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:46,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:46,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:46,103 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 17 treesize of output 7 [2022-01-18 05:27:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:46,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404917545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:46,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:46,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474659649] [2022-01-18 05:27:46,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:46,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:46,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:46,144 INFO L87 Difference]: Start difference. First operand 2169 states and 9660 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:47,101 INFO L93 Difference]: Finished difference Result 2568 states and 11112 transitions. [2022-01-18 05:27:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:27:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:47,107 INFO L225 Difference]: With dead ends: 2568 [2022-01-18 05:27:47,107 INFO L226 Difference]: Without dead ends: 2549 [2022-01-18 05:27:47,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:27:47,108 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:47,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 419 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-01-18 05:27:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2171. [2022-01-18 05:27:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-01-18 05:27:47,146 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-01-18 05:27:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-01-18 05:27:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-01-18 05:27:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:47,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:47,150 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] [2022-01-18 05:27:47,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 05:27:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 05:27:47,350 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1254794295, now seen corresponding path program 2 times [2022-01-18 05:27:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481276068] [2022-01-18 05:27:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:47,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:47,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481276068] [2022-01-18 05:27:47,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481276068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336113877] [2022-01-18 05:27:47,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:47,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:47,468 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) [2022-01-18 05:27:47,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 05:27:47,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:47,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:47,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:47,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 05:27:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:47,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336113877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:48,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:48,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:48,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845405815] [2022-01-18 05:27:48,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:48,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:48,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:48,048 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:48,525 INFO L93 Difference]: Finished difference Result 2471 states and 10753 transitions. [2022-01-18 05:27:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:27:48,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:48,531 INFO L225 Difference]: With dead ends: 2471 [2022-01-18 05:27:48,532 INFO L226 Difference]: Without dead ends: 2452 [2022-01-18 05:27:48,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:27:48,532 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:48,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-01-18 05:27:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2171. [2022-01-18 05:27:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-01-18 05:27:48,564 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-01-18 05:27:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:48,564 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-01-18 05:27:48,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-01-18 05:27:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:48,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:48,568 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, 1, 1, 1] [2022-01-18 05:27:48,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 05:27:48,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 05:27:48,768 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash 691196871, now seen corresponding path program 3 times [2022-01-18 05:27:48,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696321138] [2022-01-18 05:27:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:48,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:48,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696321138] [2022-01-18 05:27:48,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696321138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699356530] [2022-01-18 05:27:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:48,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:48,874 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) [2022-01-18 05:27:48,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 05:27:48,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:48,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:49,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:49,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699356530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:49,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:49,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:49,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330203471] [2022-01-18 05:27:49,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:49,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:49,407 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:49,932 INFO L93 Difference]: Finished difference Result 2498 states and 10814 transitions. [2022-01-18 05:27:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:49,938 INFO L225 Difference]: With dead ends: 2498 [2022-01-18 05:27:49,938 INFO L226 Difference]: Without dead ends: 2479 [2022-01-18 05:27:49,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:27:49,939 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:49,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 328 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-01-18 05:27:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2174. [2022-01-18 05:27:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 4.453750575241601) internal successors, (9678), 2173 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 9678 transitions. [2022-01-18 05:27:49,977 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 9678 transitions. Word has length 29 [2022-01-18 05:27:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:49,977 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 9678 transitions. [2022-01-18 05:27:49,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 9678 transitions. [2022-01-18 05:27:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:49,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:49,981 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] [2022-01-18 05:27:49,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 05:27:50,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,182 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 319971865, now seen corresponding path program 4 times [2022-01-18 05:27:50,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:50,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542679417] [2022-01-18 05:27:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:50,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542679417] [2022-01-18 05:27:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542679417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385162389] [2022-01-18 05:27:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:50,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:50,278 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) [2022-01-18 05:27:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 05:27:50,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:50,496 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 19 treesize of output 11 [2022-01-18 05:27:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:50,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:50,724 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 17 treesize of output 22 [2022-01-18 05:27:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:50,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385162389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:50,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:50,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:50,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991330435] [2022-01-18 05:27:50,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:50,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:50,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:50,767 INFO L87 Difference]: Start difference. First operand 2174 states and 9678 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:51,631 INFO L93 Difference]: Finished difference Result 3172 states and 13428 transitions. [2022-01-18 05:27:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:27:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:51,639 INFO L225 Difference]: With dead ends: 3172 [2022-01-18 05:27:51,639 INFO L226 Difference]: Without dead ends: 3144 [2022-01-18 05:27:51,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:27:51,640 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 366 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:51,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 456 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:27:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-01-18 05:27:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2296. [2022-01-18 05:27:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 4.484967320261438) internal successors, (10293), 2295 states have internal predecessors, (10293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 10293 transitions. [2022-01-18 05:27:51,687 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 10293 transitions. Word has length 29 [2022-01-18 05:27:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:51,688 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 10293 transitions. [2022-01-18 05:27:51,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 10293 transitions. [2022-01-18 05:27:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:51,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:51,693 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] [2022-01-18 05:27:51,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:51,915 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,SelfDestructingSolverStorable69 [2022-01-18 05:27:51,915 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1267603755, now seen corresponding path program 2 times [2022-01-18 05:27:51,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:51,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864191984] [2022-01-18 05:27:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:51,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:52,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:52,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864191984] [2022-01-18 05:27:52,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864191984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:52,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662499281] [2022-01-18 05:27:52,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:52,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:52,020 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) [2022-01-18 05:27:52,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 05:27:52,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:52,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:52,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:52,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:27:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:52,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662499281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:52,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:52,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:52,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476779238] [2022-01-18 05:27:52,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:52,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:52,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:52,546 INFO L87 Difference]: Start difference. First operand 2296 states and 10293 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:53,093 INFO L93 Difference]: Finished difference Result 2614 states and 11429 transitions. [2022-01-18 05:27:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:27:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:53,099 INFO L225 Difference]: With dead ends: 2614 [2022-01-18 05:27:53,099 INFO L226 Difference]: Without dead ends: 2595 [2022-01-18 05:27:53,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:27:53,100 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:53,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 373 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-01-18 05:27:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2299. [2022-01-18 05:27:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-01-18 05:27:53,131 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-01-18 05:27:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:53,131 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-01-18 05:27:53,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-01-18 05:27:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:53,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:53,135 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] [2022-01-18 05:27:53,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:53,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:53,338 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1477728721, now seen corresponding path program 3 times [2022-01-18 05:27:53,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005212083] [2022-01-18 05:27:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:53,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005212083] [2022-01-18 05:27:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005212083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752888827] [2022-01-18 05:27:53,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:53,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:53,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:53,435 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) [2022-01-18 05:27:53,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 05:27:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:53,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:53,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 [2022-01-18 05:27:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752888827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:53,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:53,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:27:53,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999895499] [2022-01-18 05:27:53,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:53,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:53,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:53,971 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:54,543 INFO L93 Difference]: Finished difference Result 2653 states and 11530 transitions. [2022-01-18 05:27:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:27:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:54,549 INFO L225 Difference]: With dead ends: 2653 [2022-01-18 05:27:54,550 INFO L226 Difference]: Without dead ends: 2634 [2022-01-18 05:27:54,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:27:54,550 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:54,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 327 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:27:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-01-18 05:27:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2299. [2022-01-18 05:27:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-01-18 05:27:54,601 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-01-18 05:27:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:54,601 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-01-18 05:27:54,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:27:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-01-18 05:27:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:54,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:54,605 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] [2022-01-18 05:27:54,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 05:27:54,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:54,805 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -55373895, now seen corresponding path program 4 times [2022-01-18 05:27:54,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:54,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672801975] [2022-01-18 05:27:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:54,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672801975] [2022-01-18 05:27:54,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672801975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197283100] [2022-01-18 05:27:54,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:54,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:54,898 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) [2022-01-18 05:27:54,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 05:27:54,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:27:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:55,093 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 19 treesize of output 11 [2022-01-18 05:27:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:55,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:55,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:55,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:55,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:55,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197283100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:55,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:55,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:27:55,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688583664] [2022-01-18 05:27:55,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:55,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:55,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:55,370 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:56,327 INFO L93 Difference]: Finished difference Result 3425 states and 14506 transitions. [2022-01-18 05:27:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:27:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:56,336 INFO L225 Difference]: With dead ends: 3425 [2022-01-18 05:27:56,336 INFO L226 Difference]: Without dead ends: 3397 [2022-01-18 05:27:56,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:27:56,336 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 336 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:56,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 545 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:27:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-01-18 05:27:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 2390. [2022-01-18 05:27:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.50188363331938) internal successors, (10755), 2389 states have internal predecessors, (10755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10755 transitions. [2022-01-18 05:27:56,393 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10755 transitions. Word has length 29 [2022-01-18 05:27:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:56,393 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 10755 transitions. [2022-01-18 05:27:56,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10755 transitions. [2022-01-18 05:27:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:56,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:56,398 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] [2022-01-18 05:27:56,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 05:27:56,611 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,SelfDestructingSolverStorable72 [2022-01-18 05:27:56,611 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 11294687, now seen corresponding path program 5 times [2022-01-18 05:27:56,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:56,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55933984] [2022-01-18 05:27:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:56,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:56,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:56,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55933984] [2022-01-18 05:27:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55933984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:56,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776761700] [2022-01-18 05:27:56,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:56,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:56,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:56,728 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) [2022-01-18 05:27:56,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 05:27:56,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:27:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:56,940 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 19 treesize of output 11 [2022-01-18 05:27:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:57,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:57,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:57,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:57,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:27:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:57,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776761700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:57,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:57,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:27:57,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140849760] [2022-01-18 05:27:57,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:57,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:57,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:57,242 INFO L87 Difference]: Start difference. First operand 2390 states and 10755 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:58,468 INFO L93 Difference]: Finished difference Result 3525 states and 14857 transitions. [2022-01-18 05:27:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:27:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:27:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:58,477 INFO L225 Difference]: With dead ends: 3525 [2022-01-18 05:27:58,477 INFO L226 Difference]: Without dead ends: 3452 [2022-01-18 05:27:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:27:58,477 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 477 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:58,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 593 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:27:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-01-18 05:27:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2361. [2022-01-18 05:27:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 4.497457627118644) internal successors, (10614), 2360 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 10614 transitions. [2022-01-18 05:27:58,515 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 10614 transitions. Word has length 29 [2022-01-18 05:27:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:58,515 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 10614 transitions. [2022-01-18 05:27:58,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 10614 transitions. [2022-01-18 05:27:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:27:58,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:58,518 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] [2022-01-18 05:27:58,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 05:27:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,719 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:27:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1417591807, now seen corresponding path program 5 times [2022-01-18 05:27:58,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:58,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434612317] [2022-01-18 05:27:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:58,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:58,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434612317] [2022-01-18 05:27:58,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434612317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357392423] [2022-01-18 05:27:58,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:58,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:58,821 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) [2022-01-18 05:27:58,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 05:27:58,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 05:27:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:59,011 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 19 treesize of output 11 [2022-01-18 05:27:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:59,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:59,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:59,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:27:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:59,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:27:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:59,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357392423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:59,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:59,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:27:59,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013648326] [2022-01-18 05:27:59,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:59,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:27:59,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:27:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:59,327 INFO L87 Difference]: Start difference. First operand 2361 states and 10614 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 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) [2022-01-18 05:28:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:00,381 INFO L93 Difference]: Finished difference Result 3500 states and 14724 transitions. [2022-01-18 05:28:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 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 29 [2022-01-18 05:28:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:00,390 INFO L225 Difference]: With dead ends: 3500 [2022-01-18 05:28:00,390 INFO L226 Difference]: Without dead ends: 3446 [2022-01-18 05:28:00,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:28:00,390 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 527 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:00,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 476 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-01-18 05:28:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2300. [2022-01-18 05:28:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 4.5045672031317965) internal successors, (10356), 2299 states have internal predecessors, (10356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 10356 transitions. [2022-01-18 05:28:00,428 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 10356 transitions. Word has length 29 [2022-01-18 05:28:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 10356 transitions. [2022-01-18 05:28:00,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 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) [2022-01-18 05:28:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 10356 transitions. [2022-01-18 05:28:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:00,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:00,432 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] [2022-01-18 05:28:00,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 05:28:00,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:00,635 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1130286919, now seen corresponding path program 6 times [2022-01-18 05:28:00,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276532016] [2022-01-18 05:28:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:00,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:00,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276532016] [2022-01-18 05:28:00,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276532016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776292254] [2022-01-18 05:28:00,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:00,760 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) [2022-01-18 05:28:00,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 05:28:00,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:28:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:00,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:00,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:00,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:00,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:01,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776292254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:01,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:01,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:28:01,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270506318] [2022-01-18 05:28:01,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:01,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:01,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:01,473 INFO L87 Difference]: Start difference. First operand 2300 states and 10356 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-01-18 05:28:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:02,106 INFO L93 Difference]: Finished difference Result 2715 states and 11861 transitions. [2022-01-18 05:28:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:28:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-01-18 05:28:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:02,112 INFO L225 Difference]: With dead ends: 2715 [2022-01-18 05:28:02,113 INFO L226 Difference]: Without dead ends: 2696 [2022-01-18 05:28:02,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:28:02,113 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:02,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 320 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-01-18 05:28:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2350. [2022-01-18 05:28:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 4.5053214133673904) internal successors, (10583), 2349 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 10583 transitions. [2022-01-18 05:28:02,149 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 10583 transitions. Word has length 29 [2022-01-18 05:28:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:02,149 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 10583 transitions. [2022-01-18 05:28:02,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-01-18 05:28:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 10583 transitions. [2022-01-18 05:28:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:02,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:02,153 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] [2022-01-18 05:28:02,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 05:28:02,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:02,354 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1861407771, now seen corresponding path program 7 times [2022-01-18 05:28:02,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:02,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358478902] [2022-01-18 05:28:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:02,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:02,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358478902] [2022-01-18 05:28:02,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358478902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465432702] [2022-01-18 05:28:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:02,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:02,453 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) [2022-01-18 05:28:02,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 05:28:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:02,623 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 15 treesize of output 7 [2022-01-18 05:28:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:02,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:02,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:02,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:02,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:02,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465432702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:02,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:02,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:02,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397242621] [2022-01-18 05:28:02,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:02,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:02,930 INFO L87 Difference]: Start difference. First operand 2350 states and 10583 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:03,746 INFO L93 Difference]: Finished difference Result 3293 states and 14031 transitions. [2022-01-18 05:28:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:28:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:03,757 INFO L225 Difference]: With dead ends: 3293 [2022-01-18 05:28:03,757 INFO L226 Difference]: Without dead ends: 3265 [2022-01-18 05:28:03,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:28:03,758 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 400 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:03,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 418 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-01-18 05:28:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2460. [2022-01-18 05:28:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 4.513623424156161) internal successors, (11099), 2459 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 11099 transitions. [2022-01-18 05:28:03,799 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 11099 transitions. Word has length 29 [2022-01-18 05:28:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:03,799 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 11099 transitions. [2022-01-18 05:28:03,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 11099 transitions. [2022-01-18 05:28:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:03,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:03,803 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] [2022-01-18 05:28:03,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 05:28:04,004 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,SelfDestructingSolverStorable76 [2022-01-18 05:28:04,004 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1914794291, now seen corresponding path program 8 times [2022-01-18 05:28:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:04,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024437006] [2022-01-18 05:28:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:04,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:04,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024437006] [2022-01-18 05:28:04,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024437006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175798364] [2022-01-18 05:28:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:04,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:04,100 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) [2022-01-18 05:28:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 05:28:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:04,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:04,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:04,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:04,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175798364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:04,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:04,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:28:04,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154061898] [2022-01-18 05:28:04,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:04,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:04,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:04,618 INFO L87 Difference]: Start difference. First operand 2460 states and 11099 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2022-01-18 05:28:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:05,071 INFO L93 Difference]: Finished difference Result 2720 states and 12010 transitions. [2022-01-18 05:28:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:28:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 29 [2022-01-18 05:28:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:05,078 INFO L225 Difference]: With dead ends: 2720 [2022-01-18 05:28:05,078 INFO L226 Difference]: Without dead ends: 2697 [2022-01-18 05:28:05,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:05,078 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 385 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:05,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 230 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-01-18 05:28:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2404. [2022-01-18 05:28:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-01-18 05:28:05,113 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-01-18 05:28:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:05,114 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-01-18 05:28:05,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2022-01-18 05:28:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-01-18 05:28:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:05,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:05,118 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] [2022-01-18 05:28:05,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:05,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:05,318 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1843632387, now seen corresponding path program 9 times [2022-01-18 05:28:05,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992349807] [2022-01-18 05:28:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:05,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:05,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992349807] [2022-01-18 05:28:05,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992349807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833873461] [2022-01-18 05:28:05,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:05,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:05,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:05,448 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) [2022-01-18 05:28:05,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 05:28:05,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:28:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:05,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:05,632 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 11 treesize of output 15 [2022-01-18 05:28:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:05,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:06,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833873461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:06,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:06,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:28:06,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965839027] [2022-01-18 05:28:06,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:06,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:06,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:06,031 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-01-18 05:28:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:06,623 INFO L93 Difference]: Finished difference Result 2552 states and 11385 transitions. [2022-01-18 05:28:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:28:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-01-18 05:28:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:06,629 INFO L225 Difference]: With dead ends: 2552 [2022-01-18 05:28:06,630 INFO L226 Difference]: Without dead ends: 2533 [2022-01-18 05:28:06,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:06,630 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:06,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 347 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-01-18 05:28:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2404. [2022-01-18 05:28:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-01-18 05:28:06,668 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-01-18 05:28:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:06,668 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-01-18 05:28:06,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-01-18 05:28:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-01-18 05:28:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:06,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:06,672 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] [2022-01-18 05:28:06,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 05:28:06,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:06,873 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1280034963, now seen corresponding path program 10 times [2022-01-18 05:28:06,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:06,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110096595] [2022-01-18 05:28:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:06,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:07,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:07,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110096595] [2022-01-18 05:28:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110096595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:07,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182264864] [2022-01-18 05:28:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:07,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:07,004 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) [2022-01-18 05:28:07,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 05:28:07,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:07,198 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 15 treesize of output 7 [2022-01-18 05:28:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:07,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:07,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:07,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:07,468 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 17 treesize of output 7 [2022-01-18 05:28:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:07,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182264864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:07,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:07,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:07,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698721293] [2022-01-18 05:28:07,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:07,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:07,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:07,522 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:08,443 INFO L93 Difference]: Finished difference Result 3157 states and 13499 transitions. [2022-01-18 05:28:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:28:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:08,451 INFO L225 Difference]: With dead ends: 3157 [2022-01-18 05:28:08,451 INFO L226 Difference]: Without dead ends: 3115 [2022-01-18 05:28:08,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:28:08,452 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 487 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:08,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 377 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-01-18 05:28:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2389. [2022-01-18 05:28:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.516331658291457) internal successors, (10785), 2388 states have internal predecessors, (10785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10785 transitions. [2022-01-18 05:28:08,489 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10785 transitions. Word has length 29 [2022-01-18 05:28:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:08,489 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 10785 transitions. [2022-01-18 05:28:08,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10785 transitions. [2022-01-18 05:28:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:08,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:08,493 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] [2022-01-18 05:28:08,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:08,693 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,SelfDestructingSolverStorable79 [2022-01-18 05:28:08,693 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -109274557, now seen corresponding path program 11 times [2022-01-18 05:28:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197963598] [2022-01-18 05:28:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:08,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:08,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:08,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197963598] [2022-01-18 05:28:08,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197963598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:08,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514779165] [2022-01-18 05:28:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:08,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:08,801 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) [2022-01-18 05:28:08,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 05:28:08,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:08,973 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 15 treesize of output 7 [2022-01-18 05:28:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:09,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:09,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:09,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:09,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514779165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:09,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:09,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:09,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479671074] [2022-01-18 05:28:09,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:09,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:09,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:09,262 INFO L87 Difference]: Start difference. First operand 2389 states and 10785 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:10,226 INFO L93 Difference]: Finished difference Result 3246 states and 13969 transitions. [2022-01-18 05:28:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:28:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:10,234 INFO L225 Difference]: With dead ends: 3246 [2022-01-18 05:28:10,234 INFO L226 Difference]: Without dead ends: 3208 [2022-01-18 05:28:10,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:10,234 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 404 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:10,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 428 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2022-01-18 05:28:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2531. [2022-01-18 05:28:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.519762845849803) internal successors, (11435), 2530 states have internal predecessors, (11435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11435 transitions. [2022-01-18 05:28:10,274 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11435 transitions. Word has length 29 [2022-01-18 05:28:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:10,274 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11435 transitions. [2022-01-18 05:28:10,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11435 transitions. [2022-01-18 05:28:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:10,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:10,278 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] [2022-01-18 05:28:10,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 05:28:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:10,479 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998049, now seen corresponding path program 12 times [2022-01-18 05:28:10,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:10,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336257216] [2022-01-18 05:28:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:10,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:10,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336257216] [2022-01-18 05:28:10,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336257216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:10,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813572125] [2022-01-18 05:28:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:10,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:10,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:10,573 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) [2022-01-18 05:28:10,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 05:28:10,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:28:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:10,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:10,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:10,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:11,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813572125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:11,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:11,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 05:28:11,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649069677] [2022-01-18 05:28:11,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:11,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:11,030 INFO L87 Difference]: Start difference. First operand 2531 states and 11435 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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) [2022-01-18 05:28:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:11,385 INFO L93 Difference]: Finished difference Result 2757 states and 12227 transitions. [2022-01-18 05:28:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:28:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 29 [2022-01-18 05:28:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:11,392 INFO L225 Difference]: With dead ends: 2757 [2022-01-18 05:28:11,393 INFO L226 Difference]: Without dead ends: 2744 [2022-01-18 05:28:11,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:28:11,393 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 184 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:11,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-01-18 05:28:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2531. [2022-01-18 05:28:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.518577075098814) internal successors, (11432), 2530 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11432 transitions. [2022-01-18 05:28:11,432 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11432 transitions. Word has length 29 [2022-01-18 05:28:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11432 transitions. [2022-01-18 05:28:11,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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) [2022-01-18 05:28:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11432 transitions. [2022-01-18 05:28:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:11,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:11,436 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] [2022-01-18 05:28:11,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 05:28:11,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:11,637 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 294635977, now seen corresponding path program 13 times [2022-01-18 05:28:11,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157678681] [2022-01-18 05:28:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:11,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:11,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157678681] [2022-01-18 05:28:11,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157678681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656890411] [2022-01-18 05:28:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:11,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:11,764 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) [2022-01-18 05:28:11,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 05:28:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:11,950 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 15 treesize of output 7 [2022-01-18 05:28:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:12,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:12,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:12,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 05:28:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:12,234 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:28:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656890411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:12,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172820915] [2022-01-18 05:28:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:12,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:12,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:12,265 INFO L87 Difference]: Start difference. First operand 2531 states and 11432 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:13,190 INFO L93 Difference]: Finished difference Result 3306 states and 14104 transitions. [2022-01-18 05:28:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:13,198 INFO L225 Difference]: With dead ends: 3306 [2022-01-18 05:28:13,198 INFO L226 Difference]: Without dead ends: 3263 [2022-01-18 05:28:13,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:13,199 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 508 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:13,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 458 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-01-18 05:28:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2477. [2022-01-18 05:28:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 4.520193861066236) internal successors, (11192), 2476 states have internal predecessors, (11192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 11192 transitions. [2022-01-18 05:28:13,239 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 11192 transitions. Word has length 29 [2022-01-18 05:28:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:13,239 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 11192 transitions. [2022-01-18 05:28:13,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 11192 transitions. [2022-01-18 05:28:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:13,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:13,243 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] [2022-01-18 05:28:13,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 05:28:13,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:13,444 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash -565478263, now seen corresponding path program 14 times [2022-01-18 05:28:13,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:13,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734385401] [2022-01-18 05:28:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:13,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:13,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734385401] [2022-01-18 05:28:13,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734385401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101986811] [2022-01-18 05:28:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:13,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:13,553 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) [2022-01-18 05:28:13,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 05:28:13,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:13,742 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 15 treesize of output 7 [2022-01-18 05:28:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:13,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:14,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:14,025 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 17 treesize of output 22 [2022-01-18 05:28:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:14,036 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 17 treesize of output 7 [2022-01-18 05:28:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101986811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:14,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:14,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:28:14,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102220414] [2022-01-18 05:28:14,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:14,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:28:14,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:28:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:28:14,071 INFO L87 Difference]: Start difference. First operand 2477 states and 11192 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:15,357 INFO L93 Difference]: Finished difference Result 3069 states and 13302 transitions. [2022-01-18 05:28:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:28:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:15,364 INFO L225 Difference]: With dead ends: 3069 [2022-01-18 05:28:15,365 INFO L226 Difference]: Without dead ends: 3039 [2022-01-18 05:28:15,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:28:15,365 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 331 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:15,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 714 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:28:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-01-18 05:28:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2486. [2022-01-18 05:28:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 4.513480885311871) internal successors, (11216), 2485 states have internal predecessors, (11216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 11216 transitions. [2022-01-18 05:28:15,404 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 11216 transitions. Word has length 29 [2022-01-18 05:28:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:15,404 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 11216 transitions. [2022-01-18 05:28:15,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 11216 transitions. [2022-01-18 05:28:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:15,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:15,408 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] [2022-01-18 05:28:15,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 05:28:15,609 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,SelfDestructingSolverStorable83 [2022-01-18 05:28:15,609 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1979344029, now seen corresponding path program 6 times [2022-01-18 05:28:15,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909316476] [2022-01-18 05:28:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:15,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:15,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:15,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909316476] [2022-01-18 05:28:15,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909316476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:15,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380370575] [2022-01-18 05:28:15,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:15,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:15,714 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) [2022-01-18 05:28:15,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 05:28:15,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:28:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:15,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:15,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:15,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:16,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380370575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:16,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:16,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:28:16,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031420226] [2022-01-18 05:28:16,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:16,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:16,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:16,158 INFO L87 Difference]: Start difference. First operand 2486 states and 11216 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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) [2022-01-18 05:28:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:16,597 INFO L93 Difference]: Finished difference Result 2894 states and 12763 transitions. [2022-01-18 05:28:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:28:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 29 [2022-01-18 05:28:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:16,623 INFO L225 Difference]: With dead ends: 2894 [2022-01-18 05:28:16,623 INFO L226 Difference]: Without dead ends: 2875 [2022-01-18 05:28:16,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:28:16,623 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:16,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 238 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-01-18 05:28:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2540. [2022-01-18 05:28:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.508467900748326) internal successors, (11447), 2539 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 11447 transitions. [2022-01-18 05:28:16,662 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 11447 transitions. Word has length 29 [2022-01-18 05:28:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:16,662 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 11447 transitions. [2022-01-18 05:28:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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) [2022-01-18 05:28:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 11447 transitions. [2022-01-18 05:28:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:16,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:16,667 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] [2022-01-18 05:28:16,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 05:28:16,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:16,867 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash -556989203, now seen corresponding path program 7 times [2022-01-18 05:28:16,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380240340] [2022-01-18 05:28:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:16,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:16,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380240340] [2022-01-18 05:28:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380240340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985622411] [2022-01-18 05:28:16,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:16,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:16,967 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) [2022-01-18 05:28:16,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 05:28:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:17,127 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 15 treesize of output 7 [2022-01-18 05:28:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:17,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:17,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:17,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:17,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:17,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985622411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:17,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:17,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:17,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882401671] [2022-01-18 05:28:17,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:17,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:17,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:17,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:17,431 INFO L87 Difference]: Start difference. First operand 2540 states and 11447 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:18,179 INFO L93 Difference]: Finished difference Result 3497 states and 14957 transitions. [2022-01-18 05:28:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:28:18,180 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:18,188 INFO L225 Difference]: With dead ends: 3497 [2022-01-18 05:28:18,188 INFO L226 Difference]: Without dead ends: 3469 [2022-01-18 05:28:18,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:28:18,188 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 377 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:18,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 382 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-01-18 05:28:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2669. [2022-01-18 05:28:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2668 states have (on average 4.508620689655173) internal successors, (12029), 2668 states have internal predecessors, (12029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 12029 transitions. [2022-01-18 05:28:18,234 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 12029 transitions. Word has length 29 [2022-01-18 05:28:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:18,235 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 12029 transitions. [2022-01-18 05:28:18,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 12029 transitions. [2022-01-18 05:28:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:18,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:18,239 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] [2022-01-18 05:28:18,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:18,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:18,440 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -156115671, now seen corresponding path program 8 times [2022-01-18 05:28:18,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618057637] [2022-01-18 05:28:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:18,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:18,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618057637] [2022-01-18 05:28:18,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618057637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190385034] [2022-01-18 05:28:18,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:18,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:18,544 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) [2022-01-18 05:28:18,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 05:28:18,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:18,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:18,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:19,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190385034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:19,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:19,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:28:19,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813284748] [2022-01-18 05:28:19,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:19,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:19,072 INFO L87 Difference]: Start difference. First operand 2669 states and 12029 transitions. Second operand has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:28:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:19,573 INFO L93 Difference]: Finished difference Result 2976 states and 13095 transitions. [2022-01-18 05:28:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:28:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) 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 29 [2022-01-18 05:28:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:19,580 INFO L225 Difference]: With dead ends: 2976 [2022-01-18 05:28:19,580 INFO L226 Difference]: Without dead ends: 2953 [2022-01-18 05:28:19,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:19,581 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 281 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:19,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 268 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-01-18 05:28:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2597. [2022-01-18 05:28:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-01-18 05:28:19,620 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-01-18 05:28:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:19,621 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-01-18 05:28:19,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) 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) [2022-01-18 05:28:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-01-18 05:28:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:19,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:19,625 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] [2022-01-18 05:28:19,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 05:28:19,825 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,SelfDestructingSolverStorable86 [2022-01-18 05:28:19,825 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1075204841, now seen corresponding path program 9 times [2022-01-18 05:28:19,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:19,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116202165] [2022-01-18 05:28:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:19,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:19,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116202165] [2022-01-18 05:28:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116202165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773870055] [2022-01-18 05:28:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:19,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:19,935 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) [2022-01-18 05:28:19,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 05:28:19,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:28:19,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:28:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:20,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:20,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:20,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773870055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:20,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:28:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089712007] [2022-01-18 05:28:20,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:20,390 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:28:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:20,801 INFO L93 Difference]: Finished difference Result 2734 states and 12196 transitions. [2022-01-18 05:28:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:28:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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 29 [2022-01-18 05:28:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:20,808 INFO L225 Difference]: With dead ends: 2734 [2022-01-18 05:28:20,808 INFO L226 Difference]: Without dead ends: 2719 [2022-01-18 05:28:20,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:28:20,808 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:20,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 288 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-01-18 05:28:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2597. [2022-01-18 05:28:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-01-18 05:28:20,845 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-01-18 05:28:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:20,845 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-01-18 05:28:20,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) 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) [2022-01-18 05:28:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-01-18 05:28:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:20,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:20,849 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] [2022-01-18 05:28:20,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:21,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:21,050 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash -558108055, now seen corresponding path program 10 times [2022-01-18 05:28:21,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:21,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900560516] [2022-01-18 05:28:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:21,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:21,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900560516] [2022-01-18 05:28:21,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900560516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158872180] [2022-01-18 05:28:21,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:21,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:21,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:21,172 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) [2022-01-18 05:28:21,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 05:28:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:21,357 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 15 treesize of output 7 [2022-01-18 05:28:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:21,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:21,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:21,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:21,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:21,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158872180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:21,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:21,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:21,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404235357] [2022-01-18 05:28:21,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:21,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:21,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:21,717 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:22,491 INFO L93 Difference]: Finished difference Result 3239 states and 14015 transitions. [2022-01-18 05:28:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:28:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:22,499 INFO L225 Difference]: With dead ends: 3239 [2022-01-18 05:28:22,499 INFO L226 Difference]: Without dead ends: 3215 [2022-01-18 05:28:22,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:28:22,499 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 382 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:22,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 412 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-01-18 05:28:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2590. [2022-01-18 05:28:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 4.511780610274237) internal successors, (11681), 2589 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 11681 transitions. [2022-01-18 05:28:22,539 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 11681 transitions. Word has length 29 [2022-01-18 05:28:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:22,539 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 11681 transitions. [2022-01-18 05:28:22,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 11681 transitions. [2022-01-18 05:28:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:22,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:22,543 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] [2022-01-18 05:28:22,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:22,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:22,744 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -731434137, now seen corresponding path program 11 times [2022-01-18 05:28:22,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876600995] [2022-01-18 05:28:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:22,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:22,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876600995] [2022-01-18 05:28:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876600995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208538410] [2022-01-18 05:28:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:22,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:22,871 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) [2022-01-18 05:28:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 05:28:22,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:22,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:23,026 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 15 treesize of output 7 [2022-01-18 05:28:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:23,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:23,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:23,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:23,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208538410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:23,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:23,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88359257] [2022-01-18 05:28:23,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:23,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:23,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:23,339 INFO L87 Difference]: Start difference. First operand 2590 states and 11681 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:24,306 INFO L93 Difference]: Finished difference Result 3767 states and 15975 transitions. [2022-01-18 05:28:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:28:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:24,315 INFO L225 Difference]: With dead ends: 3767 [2022-01-18 05:28:24,315 INFO L226 Difference]: Without dead ends: 3729 [2022-01-18 05:28:24,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:24,316 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 509 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:24,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 428 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-01-18 05:28:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2764. [2022-01-18 05:28:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.509952949692363) internal successors, (12461), 2763 states have internal predecessors, (12461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12461 transitions. [2022-01-18 05:28:24,368 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12461 transitions. Word has length 29 [2022-01-18 05:28:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:24,368 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12461 transitions. [2022-01-18 05:28:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12461 transitions. [2022-01-18 05:28:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:24,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:24,373 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] [2022-01-18 05:28:24,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 05:28:24,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 05:28:24,574 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 690920689, now seen corresponding path program 12 times [2022-01-18 05:28:24,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257018555] [2022-01-18 05:28:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:24,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:24,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257018555] [2022-01-18 05:28:24,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257018555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465239222] [2022-01-18 05:28:24,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:24,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:24,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:24,669 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) [2022-01-18 05:28:24,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 05:28:24,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:24,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:28:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:24,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:24,780 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 11 treesize of output 15 [2022-01-18 05:28:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:24,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465239222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:25,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:25,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 05:28:25,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941163874] [2022-01-18 05:28:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:25,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:25,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:25,106 INFO L87 Difference]: Start difference. First operand 2764 states and 12461 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2022-01-18 05:28:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:25,410 INFO L93 Difference]: Finished difference Result 3113 states and 13640 transitions. [2022-01-18 05:28:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:28:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 29 [2022-01-18 05:28:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:25,418 INFO L225 Difference]: With dead ends: 3113 [2022-01-18 05:28:25,418 INFO L226 Difference]: Without dead ends: 3100 [2022-01-18 05:28:25,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:28:25,418 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:25,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 191 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:28:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-01-18 05:28:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2764. [2022-01-18 05:28:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.508867173362288) internal successors, (12458), 2763 states have internal predecessors, (12458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12458 transitions. [2022-01-18 05:28:25,460 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12458 transitions. Word has length 29 [2022-01-18 05:28:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:25,460 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12458 transitions. [2022-01-18 05:28:25,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2022-01-18 05:28:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12458 transitions. [2022-01-18 05:28:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:25,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:25,465 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] [2022-01-18 05:28:25,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:25,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:25,665 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash 245818669, now seen corresponding path program 13 times [2022-01-18 05:28:25,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:25,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243434561] [2022-01-18 05:28:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:25,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:25,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243434561] [2022-01-18 05:28:25,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243434561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988729663] [2022-01-18 05:28:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:25,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:25,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:25,772 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) [2022-01-18 05:28:25,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 05:28:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:25,921 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 15 treesize of output 7 [2022-01-18 05:28:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:26,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:26,186 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 17 treesize of output 22 [2022-01-18 05:28:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:26,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988729663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:26,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:26,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:26,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958512267] [2022-01-18 05:28:26,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:26,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:26,229 INFO L87 Difference]: Start difference. First operand 2764 states and 12458 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:27,107 INFO L93 Difference]: Finished difference Result 3696 states and 15794 transitions. [2022-01-18 05:28:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:27,116 INFO L225 Difference]: With dead ends: 3696 [2022-01-18 05:28:27,116 INFO L226 Difference]: Without dead ends: 3650 [2022-01-18 05:28:27,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:27,116 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 500 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 392 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-01-18 05:28:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2657. [2022-01-18 05:28:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 4.511295180722891) internal successors, (11982), 2656 states have internal predecessors, (11982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 11982 transitions. [2022-01-18 05:28:27,163 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 11982 transitions. Word has length 29 [2022-01-18 05:28:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:27,163 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 11982 transitions. [2022-01-18 05:28:27,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 11982 transitions. [2022-01-18 05:28:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:27,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:27,168 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] [2022-01-18 05:28:27,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 05:28:27,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:27,368 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -892761565, now seen corresponding path program 14 times [2022-01-18 05:28:27,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:27,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391095335] [2022-01-18 05:28:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:27,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:27,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391095335] [2022-01-18 05:28:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391095335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765573669] [2022-01-18 05:28:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:27,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:27,481 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) [2022-01-18 05:28:27,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 05:28:27,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:27,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:27,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:27,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:27,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:28,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765573669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:28,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:28,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:28:28,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600386005] [2022-01-18 05:28:28,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:28,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:28,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:28,041 INFO L87 Difference]: Start difference. First operand 2657 states and 11982 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) 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) [2022-01-18 05:28:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:28,527 INFO L93 Difference]: Finished difference Result 2811 states and 12524 transitions. [2022-01-18 05:28:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:28:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) 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 29 [2022-01-18 05:28:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:28,534 INFO L225 Difference]: With dead ends: 2811 [2022-01-18 05:28:28,534 INFO L226 Difference]: Without dead ends: 2792 [2022-01-18 05:28:28,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:28,534 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 137 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:28,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 300 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-01-18 05:28:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2636. [2022-01-18 05:28:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 4.516508538899431) internal successors, (11901), 2635 states have internal predecessors, (11901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 11901 transitions. [2022-01-18 05:28:28,574 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 11901 transitions. Word has length 29 [2022-01-18 05:28:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:28,574 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 11901 transitions. [2022-01-18 05:28:28,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) 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) [2022-01-18 05:28:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 11901 transitions. [2022-01-18 05:28:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:28,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:28,579 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] [2022-01-18 05:28:28,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 05:28:28,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:28,780 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1546865603, now seen corresponding path program 15 times [2022-01-18 05:28:28,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:28,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5339455] [2022-01-18 05:28:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:28,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:28,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5339455] [2022-01-18 05:28:28,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5339455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732403350] [2022-01-18 05:28:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:28,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:28,886 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) [2022-01-18 05:28:28,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 05:28:28,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:28:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:28:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:29,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:29,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:29,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:29,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732403350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:29,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:29,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 05:28:29,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917838284] [2022-01-18 05:28:29,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:29,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:29,321 INFO L87 Difference]: Start difference. First operand 2636 states and 11901 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-01-18 05:28:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:29,853 INFO L93 Difference]: Finished difference Result 3041 states and 13364 transitions. [2022-01-18 05:28:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:28:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 29 [2022-01-18 05:28:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:29,861 INFO L225 Difference]: With dead ends: 3041 [2022-01-18 05:28:29,861 INFO L226 Difference]: Without dead ends: 3022 [2022-01-18 05:28:29,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:28:29,862 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:29,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 304 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-01-18 05:28:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2689. [2022-01-18 05:28:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.515625) internal successors, (12138), 2688 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 12138 transitions. [2022-01-18 05:28:29,906 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 12138 transitions. Word has length 29 [2022-01-18 05:28:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 12138 transitions. [2022-01-18 05:28:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-01-18 05:28:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 12138 transitions. [2022-01-18 05:28:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:29,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:29,910 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] [2022-01-18 05:28:29,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 05:28:30,111 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,SelfDestructingSolverStorable93 [2022-01-18 05:28:30,111 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash -243592997, now seen corresponding path program 16 times [2022-01-18 05:28:30,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:30,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255021067] [2022-01-18 05:28:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:30,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:30,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255021067] [2022-01-18 05:28:30,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255021067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561514140] [2022-01-18 05:28:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:30,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:30,208 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) [2022-01-18 05:28:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 05:28:30,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:30,379 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 15 treesize of output 7 [2022-01-18 05:28:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:30,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:30,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:30,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:30,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561514140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:30,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:30,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:30,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077447897] [2022-01-18 05:28:30,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:30,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:30,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:30,689 INFO L87 Difference]: Start difference. First operand 2689 states and 12138 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:31,499 INFO L93 Difference]: Finished difference Result 3583 states and 15392 transitions. [2022-01-18 05:28:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:28:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:31,507 INFO L225 Difference]: With dead ends: 3583 [2022-01-18 05:28:31,508 INFO L226 Difference]: Without dead ends: 3555 [2022-01-18 05:28:31,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:28:31,508 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 417 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:31,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 424 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-01-18 05:28:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2783. [2022-01-18 05:28:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 4.524083393242272) internal successors, (12586), 2782 states have internal predecessors, (12586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 12586 transitions. [2022-01-18 05:28:31,558 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 12586 transitions. Word has length 29 [2022-01-18 05:28:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:31,558 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 12586 transitions. [2022-01-18 05:28:31,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 12586 transitions. [2022-01-18 05:28:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:31,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:31,563 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] [2022-01-18 05:28:31,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:31,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:31,763 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash -296979517, now seen corresponding path program 17 times [2022-01-18 05:28:31,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:31,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120073392] [2022-01-18 05:28:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:31,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:31,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120073392] [2022-01-18 05:28:31,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120073392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217855150] [2022-01-18 05:28:31,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:31,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:31,886 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) [2022-01-18 05:28:31,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 05:28:31,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:31,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:31,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:32,074 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 15 treesize of output 7 [2022-01-18 05:28:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:32,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:32,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:32,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:32,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217855150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:32,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:32,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:32,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393091751] [2022-01-18 05:28:32,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:32,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:32,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:32,377 INFO L87 Difference]: Start difference. First operand 2783 states and 12586 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:33,167 INFO L93 Difference]: Finished difference Result 3573 states and 15377 transitions. [2022-01-18 05:28:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:28:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:33,197 INFO L225 Difference]: With dead ends: 3573 [2022-01-18 05:28:33,197 INFO L226 Difference]: Without dead ends: 3528 [2022-01-18 05:28:33,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:28:33,198 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:33,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 425 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-01-18 05:28:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2746. [2022-01-18 05:28:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 4.523861566484517) internal successors, (12418), 2745 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 12418 transitions. [2022-01-18 05:28:33,240 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 12418 transitions. Word has length 29 [2022-01-18 05:28:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:33,240 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 12418 transitions. [2022-01-18 05:28:33,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 12418 transitions. [2022-01-18 05:28:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:33,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:33,245 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] [2022-01-18 05:28:33,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:33,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:33,446 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash -833520135, now seen corresponding path program 18 times [2022-01-18 05:28:33,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119931014] [2022-01-18 05:28:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:33,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:33,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119931014] [2022-01-18 05:28:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119931014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320225947] [2022-01-18 05:28:33,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:33,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:33,555 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) [2022-01-18 05:28:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 05:28:33,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:33,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:28:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:33,734 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 15 treesize of output 7 [2022-01-18 05:28:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:33,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:34,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:34,013 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 05:28:34,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:34,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:34,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320225947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:34,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:34,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:28:34,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112903528] [2022-01-18 05:28:34,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:34,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:28:34,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:28:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:28:34,083 INFO L87 Difference]: Start difference. First operand 2746 states and 12418 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:35,156 INFO L93 Difference]: Finished difference Result 3370 states and 14667 transitions. [2022-01-18 05:28:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:28:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:35,165 INFO L225 Difference]: With dead ends: 3370 [2022-01-18 05:28:35,165 INFO L226 Difference]: Without dead ends: 3332 [2022-01-18 05:28:35,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:28:35,166 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 405 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:35,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 482 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:28:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-01-18 05:28:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2725. [2022-01-18 05:28:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.526431718061674) internal successors, (12330), 2724 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 12330 transitions. [2022-01-18 05:28:35,233 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 12330 transitions. Word has length 29 [2022-01-18 05:28:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:35,233 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 12330 transitions. [2022-01-18 05:28:35,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 12330 transitions. [2022-01-18 05:28:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:35,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:35,238 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] [2022-01-18 05:28:35,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:35,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:35,439 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1508540217, now seen corresponding path program 19 times [2022-01-18 05:28:35,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375606901] [2022-01-18 05:28:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:35,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:35,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375606901] [2022-01-18 05:28:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375606901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567062573] [2022-01-18 05:28:35,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:35,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:35,543 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) [2022-01-18 05:28:35,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 05:28:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:35,713 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 15 treesize of output 7 [2022-01-18 05:28:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:35,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:35,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:35,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:35,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567062573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:36,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101659764] [2022-01-18 05:28:36,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:36,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:36,011 INFO L87 Difference]: Start difference. First operand 2725 states and 12330 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:36,916 INFO L93 Difference]: Finished difference Result 3641 states and 15769 transitions. [2022-01-18 05:28:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:36,925 INFO L225 Difference]: With dead ends: 3641 [2022-01-18 05:28:36,925 INFO L226 Difference]: Without dead ends: 3603 [2022-01-18 05:28:36,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:36,926 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 485 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:36,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 390 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:28:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-01-18 05:28:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2862. [2022-01-18 05:28:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.53163229639986) internal successors, (12965), 2861 states have internal predecessors, (12965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12965 transitions. [2022-01-18 05:28:36,974 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12965 transitions. Word has length 29 [2022-01-18 05:28:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:36,974 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12965 transitions. [2022-01-18 05:28:36,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12965 transitions. [2022-01-18 05:28:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:36,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:36,979 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] [2022-01-18 05:28:36,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 05:28:37,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:37,179 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1483154473, now seen corresponding path program 20 times [2022-01-18 05:28:37,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311135183] [2022-01-18 05:28:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:37,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:37,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:37,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311135183] [2022-01-18 05:28:37,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311135183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:37,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460337451] [2022-01-18 05:28:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:37,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:37,284 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) [2022-01-18 05:28:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 05:28:37,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:37,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:37,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:37,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:37,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460337451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:37,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:28:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398509724] [2022-01-18 05:28:37,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:37,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:37,809 INFO L87 Difference]: Start difference. First operand 2862 states and 12965 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:28:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:38,327 INFO L93 Difference]: Finished difference Result 3080 states and 13720 transitions. [2022-01-18 05:28:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:28:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:28:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:38,335 INFO L225 Difference]: With dead ends: 3080 [2022-01-18 05:28:38,335 INFO L226 Difference]: Without dead ends: 3067 [2022-01-18 05:28:38,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:38,335 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:38,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 284 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-01-18 05:28:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2862. [2022-01-18 05:28:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.5305837119888155) internal successors, (12962), 2861 states have internal predecessors, (12962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12962 transitions. [2022-01-18 05:28:38,379 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12962 transitions. Word has length 29 [2022-01-18 05:28:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:38,379 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12962 transitions. [2022-01-18 05:28:38,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:28:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12962 transitions. [2022-01-18 05:28:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:38,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:38,384 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] [2022-01-18 05:28:38,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:38,584 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,SelfDestructingSolverStorable98 [2022-01-18 05:28:38,585 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1912450751, now seen corresponding path program 21 times [2022-01-18 05:28:38,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84395389] [2022-01-18 05:28:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:38,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:38,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84395389] [2022-01-18 05:28:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84395389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679969428] [2022-01-18 05:28:38,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:38,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:38,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:38,691 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) [2022-01-18 05:28:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 05:28:38,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:28:38,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:38,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:38,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:38,857 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 11 treesize of output 15 [2022-01-18 05:28:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:39,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679969428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:39,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:39,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:28:39,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908794647] [2022-01-18 05:28:39,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:39,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:39,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:39,232 INFO L87 Difference]: Start difference. First operand 2862 states and 12962 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:28:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:39,886 INFO L93 Difference]: Finished difference Result 3113 states and 13817 transitions. [2022-01-18 05:28:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:28:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:28:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:39,894 INFO L225 Difference]: With dead ends: 3113 [2022-01-18 05:28:39,894 INFO L226 Difference]: Without dead ends: 3085 [2022-01-18 05:28:39,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:28:39,895 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:39,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 332 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-01-18 05:28:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2808. [2022-01-18 05:28:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 4.5322408265051655) internal successors, (12722), 2807 states have internal predecessors, (12722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 12722 transitions. [2022-01-18 05:28:39,937 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 12722 transitions. Word has length 29 [2022-01-18 05:28:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:39,937 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 12722 transitions. [2022-01-18 05:28:39,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:28:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 12722 transitions. [2022-01-18 05:28:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:39,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:39,942 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] [2022-01-18 05:28:39,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 05:28:40,142 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,SelfDestructingSolverStorable99 [2022-01-18 05:28:40,142 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1052336511, now seen corresponding path program 22 times [2022-01-18 05:28:40,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321519871] [2022-01-18 05:28:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:40,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:40,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:40,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321519871] [2022-01-18 05:28:40,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321519871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:40,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036644768] [2022-01-18 05:28:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:40,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:40,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:40,255 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) [2022-01-18 05:28:40,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 05:28:40,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:40,439 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 15 treesize of output 7 [2022-01-18 05:28:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:40,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:40,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:40,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:40,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036644768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:40,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:28:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367499817] [2022-01-18 05:28:40,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:28:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:28:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:28:40,764 INFO L87 Difference]: Start difference. First operand 2808 states and 12722 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:42,063 INFO L93 Difference]: Finished difference Result 3497 states and 15184 transitions. [2022-01-18 05:28:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:42,072 INFO L225 Difference]: With dead ends: 3497 [2022-01-18 05:28:42,072 INFO L226 Difference]: Without dead ends: 3448 [2022-01-18 05:28:42,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:28:42,072 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 323 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:42,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 700 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:28:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-01-18 05:28:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2796. [2022-01-18 05:28:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.535599284436493) internal successors, (12677), 2795 states have internal predecessors, (12677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12677 transitions. [2022-01-18 05:28:42,115 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12677 transitions. Word has length 29 [2022-01-18 05:28:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 12677 transitions. [2022-01-18 05:28:42,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12677 transitions. [2022-01-18 05:28:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:42,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:42,119 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] [2022-01-18 05:28:42,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 05:28:42,320 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,SelfDestructingSolverStorable100 [2022-01-18 05:28:42,320 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:42,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1088211267, now seen corresponding path program 23 times [2022-01-18 05:28:42,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:42,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746219232] [2022-01-18 05:28:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:42,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:42,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:42,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746219232] [2022-01-18 05:28:42,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746219232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:42,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678623563] [2022-01-18 05:28:42,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:42,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:42,414 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) [2022-01-18 05:28:42,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 05:28:42,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:42,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:42,635 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 19 treesize of output 11 [2022-01-18 05:28:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:42,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:42,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:42,845 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 17 treesize of output 22 [2022-01-18 05:28:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:42,867 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 17 treesize of output 7 [2022-01-18 05:28:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:42,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678623563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:42,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:42,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:42,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532627814] [2022-01-18 05:28:42,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:42,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:42,943 INFO L87 Difference]: Start difference. First operand 2796 states and 12677 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:43,863 INFO L93 Difference]: Finished difference Result 4024 states and 17301 transitions. [2022-01-18 05:28:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:43,894 INFO L225 Difference]: With dead ends: 4024 [2022-01-18 05:28:43,894 INFO L226 Difference]: Without dead ends: 3986 [2022-01-18 05:28:43,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:28:43,895 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 550 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:43,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 446 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-01-18 05:28:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 2951. [2022-01-18 05:28:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.54271186440678) internal successors, (13401), 2950 states have internal predecessors, (13401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13401 transitions. [2022-01-18 05:28:43,944 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13401 transitions. Word has length 29 [2022-01-18 05:28:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:43,944 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13401 transitions. [2022-01-18 05:28:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13401 transitions. [2022-01-18 05:28:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:43,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:43,950 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] [2022-01-18 05:28:43,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 05:28:44,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:44,150 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 215061339, now seen corresponding path program 24 times [2022-01-18 05:28:44,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423557614] [2022-01-18 05:28:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:44,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:44,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423557614] [2022-01-18 05:28:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423557614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713950692] [2022-01-18 05:28:44,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:44,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:44,234 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) [2022-01-18 05:28:44,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 05:28:44,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:28:44,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:44,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:44,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:44,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:44,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713950692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:44,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:44,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 05:28:44,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458207810] [2022-01-18 05:28:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:44,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:28:44,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:28:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:28:44,710 INFO L87 Difference]: Start difference. First operand 2951 states and 13401 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:28:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:45,282 INFO L93 Difference]: Finished difference Result 3262 states and 14473 transitions. [2022-01-18 05:28:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:28:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 29 [2022-01-18 05:28:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:45,291 INFO L225 Difference]: With dead ends: 3262 [2022-01-18 05:28:45,291 INFO L226 Difference]: Without dead ends: 3249 [2022-01-18 05:28:45,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:45,291 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 256 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:45,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 348 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-01-18 05:28:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2951. [2022-01-18 05:28:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.541694915254237) internal successors, (13398), 2950 states have internal predecessors, (13398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13398 transitions. [2022-01-18 05:28:45,336 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13398 transitions. Word has length 29 [2022-01-18 05:28:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:45,336 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13398 transitions. [2022-01-18 05:28:45,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 05:28:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13398 transitions. [2022-01-18 05:28:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:45,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:45,341 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] [2022-01-18 05:28:45,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 05:28:45,541 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,SelfDestructingSolverStorable102 [2022-01-18 05:28:45,542 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -684300733, now seen corresponding path program 25 times [2022-01-18 05:28:45,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29867437] [2022-01-18 05:28:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:45,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:45,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:45,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29867437] [2022-01-18 05:28:45,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29867437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:45,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085836441] [2022-01-18 05:28:45,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:45,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:45,637 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) [2022-01-18 05:28:45,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 05:28:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:45,844 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 19 treesize of output 11 [2022-01-18 05:28:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:45,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:46,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:46,059 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 05:28:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:46,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:46,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085836441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:46,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:46,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:28:46,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532061233] [2022-01-18 05:28:46,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:46,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:28:46,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:28:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:28:46,129 INFO L87 Difference]: Start difference. First operand 2951 states and 13398 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:47,172 INFO L93 Difference]: Finished difference Result 4082 states and 17431 transitions. [2022-01-18 05:28:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:28:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:47,181 INFO L225 Difference]: With dead ends: 4082 [2022-01-18 05:28:47,182 INFO L226 Difference]: Without dead ends: 4039 [2022-01-18 05:28:47,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:28:47,182 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 408 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:47,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 599 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:28:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-01-18 05:28:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2900. [2022-01-18 05:28:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 4.541911003794412) internal successors, (13167), 2899 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 13167 transitions. [2022-01-18 05:28:47,233 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 13167 transitions. Word has length 29 [2022-01-18 05:28:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:47,233 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 13167 transitions. [2022-01-18 05:28:47,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 13167 transitions. [2022-01-18 05:28:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:47,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:47,238 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] [2022-01-18 05:28:47,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 05:28:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 05:28:47,439 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1544414973, now seen corresponding path program 26 times [2022-01-18 05:28:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:47,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82607141] [2022-01-18 05:28:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:47,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:47,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:47,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82607141] [2022-01-18 05:28:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82607141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:47,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431087276] [2022-01-18 05:28:47,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:47,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:47,536 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) [2022-01-18 05:28:47,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 05:28:47,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:47,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:47,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:47,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:47,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:48,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431087276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:48,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:48,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:28:48,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828846449] [2022-01-18 05:28:48,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:48,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:48,070 INFO L87 Difference]: Start difference. First operand 2900 states and 13167 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:28:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:48,534 INFO L93 Difference]: Finished difference Result 3123 states and 13925 transitions. [2022-01-18 05:28:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:28:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-01-18 05:28:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:48,542 INFO L225 Difference]: With dead ends: 3123 [2022-01-18 05:28:48,542 INFO L226 Difference]: Without dead ends: 3108 [2022-01-18 05:28:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:28:48,543 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 140 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:48,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 282 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-01-18 05:28:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2888. [2022-01-18 05:28:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 4.545202632490475) internal successors, (13122), 2887 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 13122 transitions. [2022-01-18 05:28:48,584 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 13122 transitions. Word has length 29 [2022-01-18 05:28:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:48,584 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 13122 transitions. [2022-01-18 05:28:48,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:28:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 13122 transitions. [2022-01-18 05:28:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:48,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:48,589 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] [2022-01-18 05:28:48,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:48,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:48,790 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2042885267, now seen corresponding path program 27 times [2022-01-18 05:28:48,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149474017] [2022-01-18 05:28:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:48,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:48,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149474017] [2022-01-18 05:28:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149474017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67394231] [2022-01-18 05:28:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:48,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:48,883 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) [2022-01-18 05:28:48,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 05:28:48,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:28:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:48,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:49,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:49,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:49,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67394231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:49,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:49,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:28:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465514359] [2022-01-18 05:28:49,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:49,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:28:49,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:28:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:28:49,438 INFO L87 Difference]: Start difference. First operand 2888 states and 13122 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-01-18 05:28:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:50,284 INFO L93 Difference]: Finished difference Result 3227 states and 14154 transitions. [2022-01-18 05:28:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:28:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 29 [2022-01-18 05:28:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:50,292 INFO L225 Difference]: With dead ends: 3227 [2022-01-18 05:28:50,292 INFO L226 Difference]: Without dead ends: 3212 [2022-01-18 05:28:50,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:28:50,293 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:50,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 445 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-01-18 05:28:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2896. [2022-01-18 05:28:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.540241796200346) internal successors, (13144), 2895 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13144 transitions. [2022-01-18 05:28:50,337 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13144 transitions. Word has length 29 [2022-01-18 05:28:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:50,337 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13144 transitions. [2022-01-18 05:28:50,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-01-18 05:28:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13144 transitions. [2022-01-18 05:28:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:50,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:50,342 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, 1, 1, 1] [2022-01-18 05:28:50,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:50,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:50,543 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 221849841, now seen corresponding path program 28 times [2022-01-18 05:28:50,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:50,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264355387] [2022-01-18 05:28:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:50,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:50,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264355387] [2022-01-18 05:28:50,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264355387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025806101] [2022-01-18 05:28:50,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:50,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:50,640 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) [2022-01-18 05:28:50,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 05:28:50,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:50,864 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 19 treesize of output 11 [2022-01-18 05:28:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:51,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:51,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:51,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:51,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025806101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:51,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:28:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428164106] [2022-01-18 05:28:51,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:51,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:28:51,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:28:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:28:51,161 INFO L87 Difference]: Start difference. First operand 2896 states and 13144 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:52,492 INFO L93 Difference]: Finished difference Result 3822 states and 16496 transitions. [2022-01-18 05:28:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:28:52,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:52,501 INFO L225 Difference]: With dead ends: 3822 [2022-01-18 05:28:52,502 INFO L226 Difference]: Without dead ends: 3792 [2022-01-18 05:28:52,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:28:52,502 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:52,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 691 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:28:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-01-18 05:28:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2896. [2022-01-18 05:28:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.541278065630397) internal successors, (13147), 2895 states have internal predecessors, (13147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13147 transitions. [2022-01-18 05:28:52,552 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13147 transitions. Word has length 29 [2022-01-18 05:28:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:52,552 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13147 transitions. [2022-01-18 05:28:52,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13147 transitions. [2022-01-18 05:28:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:52,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:52,557 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] [2022-01-18 05:28:52,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:52,779 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,SelfDestructingSolverStorable106 [2022-01-18 05:28:52,779 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:52,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1437686031, now seen corresponding path program 15 times [2022-01-18 05:28:52,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:52,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611015] [2022-01-18 05:28:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:52,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:52,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611015] [2022-01-18 05:28:52,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008180601] [2022-01-18 05:28:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:52,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:52,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:52,875 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) [2022-01-18 05:28:52,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 05:28:52,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:28:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:53,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:53,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:53,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:53,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008180601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:53,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:53,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:28:53,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601531838] [2022-01-18 05:28:53,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:53,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:53,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:53,379 INFO L87 Difference]: Start difference. First operand 2896 states and 13147 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:28:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:54,005 INFO L93 Difference]: Finished difference Result 3431 states and 15157 transitions. [2022-01-18 05:28:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:28:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:28:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:54,013 INFO L225 Difference]: With dead ends: 3431 [2022-01-18 05:28:54,013 INFO L226 Difference]: Without dead ends: 3412 [2022-01-18 05:28:54,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:28:54,014 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:54,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 332 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:28:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-01-18 05:28:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2939. [2022-01-18 05:28:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 4.533356024506467) internal successors, (13319), 2938 states have internal predecessors, (13319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 13319 transitions. [2022-01-18 05:28:54,075 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 13319 transitions. Word has length 29 [2022-01-18 05:28:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:54,076 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 13319 transitions. [2022-01-18 05:28:54,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:28:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 13319 transitions. [2022-01-18 05:28:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:54,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:54,080 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] [2022-01-18 05:28:54,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 05:28:54,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:54,281 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash -15331205, now seen corresponding path program 16 times [2022-01-18 05:28:54,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:54,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424128461] [2022-01-18 05:28:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:54,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:54,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:54,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424128461] [2022-01-18 05:28:54,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424128461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:54,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714909495] [2022-01-18 05:28:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:54,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:54,367 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) [2022-01-18 05:28:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 05:28:54,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:54,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:54,541 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 19 treesize of output 11 [2022-01-18 05:28:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:54,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:54,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:54,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:54,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:54,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:54,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714909495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:54,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:54,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:54,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052397375] [2022-01-18 05:28:54,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:54,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:54,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:54,854 INFO L87 Difference]: Start difference. First operand 2939 states and 13319 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:55,719 INFO L93 Difference]: Finished difference Result 4321 states and 18515 transitions. [2022-01-18 05:28:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:28:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:55,730 INFO L225 Difference]: With dead ends: 4321 [2022-01-18 05:28:55,730 INFO L226 Difference]: Without dead ends: 4293 [2022-01-18 05:28:55,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:28:55,730 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 414 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:55,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 497 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-01-18 05:28:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 3083. [2022-01-18 05:28:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 4.540882543802725) internal successors, (13995), 3082 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 13995 transitions. [2022-01-18 05:28:55,785 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 13995 transitions. Word has length 29 [2022-01-18 05:28:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:55,785 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 13995 transitions. [2022-01-18 05:28:55,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 13995 transitions. [2022-01-18 05:28:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:55,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:55,806 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] [2022-01-18 05:28:55,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 05:28:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:56,006 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 385542327, now seen corresponding path program 17 times [2022-01-18 05:28:56,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78120563] [2022-01-18 05:28:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:56,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:56,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78120563] [2022-01-18 05:28:56,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78120563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790739027] [2022-01-18 05:28:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:56,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:56,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:56,090 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) [2022-01-18 05:28:56,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 05:28:56,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:56,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:56,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:56,265 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 19 treesize of output 11 [2022-01-18 05:28:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:56,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:56,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:56,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:56,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:28:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:56,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790739027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:56,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:56,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:28:56,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618384718] [2022-01-18 05:28:56,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:56,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:56,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:56,554 INFO L87 Difference]: Start difference. First operand 3083 states and 13995 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:57,417 INFO L93 Difference]: Finished difference Result 4335 states and 18554 transitions. [2022-01-18 05:28:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:28:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:28:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:57,427 INFO L225 Difference]: With dead ends: 4335 [2022-01-18 05:28:57,427 INFO L226 Difference]: Without dead ends: 4302 [2022-01-18 05:28:57,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:28:57,428 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 395 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:57,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 520 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:28:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-01-18 05:28:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3015. [2022-01-18 05:28:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 4.542136695421367) internal successors, (13690), 3014 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 13690 transitions. [2022-01-18 05:28:57,482 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 13690 transitions. Word has length 29 [2022-01-18 05:28:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:57,482 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 13690 transitions. [2022-01-18 05:28:57,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 13690 transitions. [2022-01-18 05:28:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:57,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:57,487 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] [2022-01-18 05:28:57,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:57,687 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,SelfDestructingSolverStorable109 [2022-01-18 05:28:57,688 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1616862839, now seen corresponding path program 18 times [2022-01-18 05:28:57,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584566491] [2022-01-18 05:28:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:57,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:57,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584566491] [2022-01-18 05:28:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584566491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640764626] [2022-01-18 05:28:57,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:57,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:57,802 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) [2022-01-18 05:28:57,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 05:28:57,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:28:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:57,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:57,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:28:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:58,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640764626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:58,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:58,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:28:58,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864750856] [2022-01-18 05:28:58,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:58,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:28:58,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:28:58,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:28:58,345 INFO L87 Difference]: Start difference. First operand 3015 states and 13690 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:28:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:58,825 INFO L93 Difference]: Finished difference Result 3287 states and 14668 transitions. [2022-01-18 05:28:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:28:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-01-18 05:28:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:58,834 INFO L225 Difference]: With dead ends: 3287 [2022-01-18 05:28:58,834 INFO L226 Difference]: Without dead ends: 3272 [2022-01-18 05:28:58,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:28:58,834 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:58,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 285 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:28:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-01-18 05:28:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2997. [2022-01-18 05:28:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 4.54539385847797) internal successors, (13618), 2996 states have internal predecessors, (13618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 13618 transitions. [2022-01-18 05:28:58,878 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 13618 transitions. Word has length 29 [2022-01-18 05:28:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:58,879 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 13618 transitions. [2022-01-18 05:28:58,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:28:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 13618 transitions. [2022-01-18 05:28:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:28:58,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:58,884 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, 1, 1, 1] [2022-01-18 05:28:58,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:59,084 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:28:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1364453939, now seen corresponding path program 19 times [2022-01-18 05:28:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:59,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218004657] [2022-01-18 05:28:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:59,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:59,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218004657] [2022-01-18 05:28:59,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218004657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824057566] [2022-01-18 05:28:59,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:59,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:59,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:59,176 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) [2022-01-18 05:28:59,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 05:28:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:28:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:59,429 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 19 treesize of output 11 [2022-01-18 05:28:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:59,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:59,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:28:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:59,647 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:28:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:59,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824057566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:59,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:59,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:28:59,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731724548] [2022-01-18 05:28:59,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:59,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:28:59,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:28:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:28:59,700 INFO L87 Difference]: Start difference. First operand 2997 states and 13618 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:00,623 INFO L93 Difference]: Finished difference Result 3324 states and 14803 transitions. [2022-01-18 05:29:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:29:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:00,631 INFO L225 Difference]: With dead ends: 3324 [2022-01-18 05:29:00,631 INFO L226 Difference]: Without dead ends: 3309 [2022-01-18 05:29:00,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:29:00,632 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 324 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:00,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 385 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-01-18 05:29:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2991. [2022-01-18 05:29:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 4.548160535117057) internal successors, (13599), 2990 states have internal predecessors, (13599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 13599 transitions. [2022-01-18 05:29:00,677 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 13599 transitions. Word has length 29 [2022-01-18 05:29:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:00,677 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 13599 transitions. [2022-01-18 05:29:00,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 13599 transitions. [2022-01-18 05:29:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:00,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:00,682 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] [2022-01-18 05:29:00,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:00,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 05:29:00,883 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -456581487, now seen corresponding path program 20 times [2022-01-18 05:29:00,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806356044] [2022-01-18 05:29:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:00,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:01,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806356044] [2022-01-18 05:29:01,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806356044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957715564] [2022-01-18 05:29:01,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:01,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:01,004 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) [2022-01-18 05:29:01,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 05:29:01,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:01,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:01,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 21 [2022-01-18 05:29:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:01,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957715564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:01,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:01,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:29:01,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225198550] [2022-01-18 05:29:01,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:01,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:29:01,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:29:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:29:01,521 INFO L87 Difference]: Start difference. First operand 2991 states and 13599 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:29:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:01,996 INFO L93 Difference]: Finished difference Result 3244 states and 14493 transitions. [2022-01-18 05:29:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:29:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-01-18 05:29:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:02,005 INFO L225 Difference]: With dead ends: 3244 [2022-01-18 05:29:02,005 INFO L226 Difference]: Without dead ends: 3229 [2022-01-18 05:29:02,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:29:02,005 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:02,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:29:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-01-18 05:29:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2972. [2022-01-18 05:29:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 4.554022214742511) internal successors, (13530), 2971 states have internal predecessors, (13530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 13530 transitions. [2022-01-18 05:29:02,073 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 13530 transitions. Word has length 29 [2022-01-18 05:29:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:02,073 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 13530 transitions. [2022-01-18 05:29:02,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-01-18 05:29:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 13530 transitions. [2022-01-18 05:29:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:02,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:02,078 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] [2022-01-18 05:29:02,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:02,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:02,279 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1831959469, now seen corresponding path program 21 times [2022-01-18 05:29:02,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200957510] [2022-01-18 05:29:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:02,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:02,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200957510] [2022-01-18 05:29:02,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200957510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976965837] [2022-01-18 05:29:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:02,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:02,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:02,384 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) [2022-01-18 05:29:02,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 05:29:02,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:29:02,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:02,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:02,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:29:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:02,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:02,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976965837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:02,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:02,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:29:02,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460916121] [2022-01-18 05:29:02,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:02,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:29:02,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:29:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:29:02,912 INFO L87 Difference]: Start difference. First operand 2972 states and 13530 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:29:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:03,560 INFO L93 Difference]: Finished difference Result 3355 states and 14980 transitions. [2022-01-18 05:29:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:29:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 29 [2022-01-18 05:29:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:03,568 INFO L225 Difference]: With dead ends: 3355 [2022-01-18 05:29:03,568 INFO L226 Difference]: Without dead ends: 3336 [2022-01-18 05:29:03,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:29:03,569 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:03,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 332 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2022-01-18 05:29:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3012. [2022-01-18 05:29:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 4.549651278644968) internal successors, (13699), 3011 states have internal predecessors, (13699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 13699 transitions. [2022-01-18 05:29:03,619 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 13699 transitions. Word has length 29 [2022-01-18 05:29:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:03,619 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 13699 transitions. [2022-01-18 05:29:03,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-01-18 05:29:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 13699 transitions. [2022-01-18 05:29:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:03,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:03,626 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] [2022-01-18 05:29:03,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:03,839 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,SelfDestructingSolverStorable113 [2022-01-18 05:29:03,839 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1040653001, now seen corresponding path program 22 times [2022-01-18 05:29:03,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:03,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371743080] [2022-01-18 05:29:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:03,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:03,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371743080] [2022-01-18 05:29:03,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371743080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655241850] [2022-01-18 05:29:03,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:03,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:03,937 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) [2022-01-18 05:29:03,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 05:29:03,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:03,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:04,098 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 15 treesize of output 7 [2022-01-18 05:29:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:04,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:04,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:04,355 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 17 treesize of output 22 [2022-01-18 05:29:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:04,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:29:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:04,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655241850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:04,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:04,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:29:04,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138001575] [2022-01-18 05:29:04,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:04,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:29:04,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:29:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:29:04,425 INFO L87 Difference]: Start difference. First operand 3012 states and 13699 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:05,209 INFO L93 Difference]: Finished difference Result 4029 states and 17462 transitions. [2022-01-18 05:29:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:29:05,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:05,219 INFO L225 Difference]: With dead ends: 4029 [2022-01-18 05:29:05,219 INFO L226 Difference]: Without dead ends: 4001 [2022-01-18 05:29:05,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:29:05,220 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 325 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:05,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 444 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-01-18 05:29:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3137. [2022-01-18 05:29:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 4.548788265306122) internal successors, (14265), 3136 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 14265 transitions. [2022-01-18 05:29:05,273 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 14265 transitions. Word has length 29 [2022-01-18 05:29:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:05,274 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 14265 transitions. [2022-01-18 05:29:05,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 14265 transitions. [2022-01-18 05:29:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:05,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:05,279 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] [2022-01-18 05:29:05,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 05:29:05,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 05:29:05,480 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -639779469, now seen corresponding path program 23 times [2022-01-18 05:29:05,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460735671] [2022-01-18 05:29:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:05,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:05,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:05,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460735671] [2022-01-18 05:29:05,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460735671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:05,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955831757] [2022-01-18 05:29:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:05,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:05,591 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) [2022-01-18 05:29:05,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 05:29:05,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:05,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:05,739 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 15 treesize of output 7 [2022-01-18 05:29:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:05,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:05,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:29:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:05,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:29:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:06,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955831757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:06,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:06,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:29:06,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504316461] [2022-01-18 05:29:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:06,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:29:06,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:29:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:29:06,050 INFO L87 Difference]: Start difference. First operand 3137 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:06,849 INFO L93 Difference]: Finished difference Result 4043 states and 17501 transitions. [2022-01-18 05:29:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:29:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:06,859 INFO L225 Difference]: With dead ends: 4043 [2022-01-18 05:29:06,859 INFO L226 Difference]: Without dead ends: 4010 [2022-01-18 05:29:06,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:06,860 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 357 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:06,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 431 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-01-18 05:29:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3038. [2022-01-18 05:29:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 4.552848205465921) internal successors, (13827), 3037 states have internal predecessors, (13827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 13827 transitions. [2022-01-18 05:29:06,913 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 13827 transitions. Word has length 29 [2022-01-18 05:29:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:06,913 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 13827 transitions. [2022-01-18 05:29:06,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 13827 transitions. [2022-01-18 05:29:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:06,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:06,918 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, 1, 1, 1, 1, 1] [2022-01-18 05:29:06,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 05:29:07,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 05:29:07,121 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 591541043, now seen corresponding path program 24 times [2022-01-18 05:29:07,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834711874] [2022-01-18 05:29:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:07,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:07,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834711874] [2022-01-18 05:29:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834711874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976164245] [2022-01-18 05:29:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:07,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:07,230 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) [2022-01-18 05:29:07,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 05:29:07,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:29:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:07,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:07,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:29:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:07,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976164245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:07,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:07,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:29:07,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476142640] [2022-01-18 05:29:07,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:07,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:29:07,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:29:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:29:07,816 INFO L87 Difference]: Start difference. First operand 3038 states and 13827 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:29:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:08,305 INFO L93 Difference]: Finished difference Result 3150 states and 14218 transitions. [2022-01-18 05:29:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:29:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:29:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:08,313 INFO L225 Difference]: With dead ends: 3150 [2022-01-18 05:29:08,314 INFO L226 Difference]: Without dead ends: 3135 [2022-01-18 05:29:08,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:08,314 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:08,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:29:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-01-18 05:29:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3017. [2022-01-18 05:29:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 4.5576923076923075) internal successors, (13746), 3016 states have internal predecessors, (13746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 13746 transitions. [2022-01-18 05:29:08,356 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 13746 transitions. Word has length 29 [2022-01-18 05:29:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:08,356 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 13746 transitions. [2022-01-18 05:29:08,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:29:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 13746 transitions. [2022-01-18 05:29:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:08,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:08,363 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] [2022-01-18 05:29:08,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 05:29:08,572 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,SelfDestructingSolverStorable116 [2022-01-18 05:29:08,572 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097935, now seen corresponding path program 25 times [2022-01-18 05:29:08,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:08,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508912633] [2022-01-18 05:29:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:08,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508912633] [2022-01-18 05:29:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508912633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961275629] [2022-01-18 05:29:08,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:08,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:08,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:08,679 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) [2022-01-18 05:29:08,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 05:29:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:08,836 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 15 treesize of output 7 [2022-01-18 05:29:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:09,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:09,082 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 17 treesize of output 22 [2022-01-18 05:29:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:09,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:29:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:09,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961275629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:09,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:09,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:29:09,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467784202] [2022-01-18 05:29:09,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:09,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:29:09,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:29:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:29:09,138 INFO L87 Difference]: Start difference. First operand 3017 states and 13746 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:10,058 INFO L93 Difference]: Finished difference Result 4128 states and 17779 transitions. [2022-01-18 05:29:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:29:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:10,068 INFO L225 Difference]: With dead ends: 4128 [2022-01-18 05:29:10,068 INFO L226 Difference]: Without dead ends: 4090 [2022-01-18 05:29:10,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:29:10,069 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 515 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:10,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 412 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-01-18 05:29:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3177. [2022-01-18 05:29:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.554156171284634) internal successors, (14464), 3176 states have internal predecessors, (14464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14464 transitions. [2022-01-18 05:29:10,150 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14464 transitions. Word has length 29 [2022-01-18 05:29:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:10,150 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14464 transitions. [2022-01-18 05:29:10,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14464 transitions. [2022-01-18 05:29:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:10,157 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] [2022-01-18 05:29:10,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 05:29:10,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:10,358 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 207256891, now seen corresponding path program 26 times [2022-01-18 05:29:10,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73120832] [2022-01-18 05:29:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:10,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:10,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73120832] [2022-01-18 05:29:10,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73120832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566316473] [2022-01-18 05:29:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:10,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:10,451 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) [2022-01-18 05:29:10,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 05:29:10,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:10,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:10,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:10,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 05:29:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566316473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:10,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:10,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 05:29:10,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123018000] [2022-01-18 05:29:10,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:10,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:29:10,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:29:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:29:10,961 INFO L87 Difference]: Start difference. First operand 3177 states and 14464 transitions. Second operand has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:29:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:11,460 INFO L93 Difference]: Finished difference Result 3501 states and 15546 transitions. [2022-01-18 05:29:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:29:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) 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 29 [2022-01-18 05:29:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:11,469 INFO L225 Difference]: With dead ends: 3501 [2022-01-18 05:29:11,469 INFO L226 Difference]: Without dead ends: 3488 [2022-01-18 05:29:11,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:29:11,469 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:11,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 263 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:29:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-01-18 05:29:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3177. [2022-01-18 05:29:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.553211586901763) internal successors, (14461), 3176 states have internal predecessors, (14461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14461 transitions. [2022-01-18 05:29:11,520 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14461 transitions. Word has length 29 [2022-01-18 05:29:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:11,520 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14461 transitions. [2022-01-18 05:29:11,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) 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) [2022-01-18 05:29:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14461 transitions. [2022-01-18 05:29:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:11,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:11,525 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] [2022-01-18 05:29:11,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 05:29:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:11,726 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -237845129, now seen corresponding path program 27 times [2022-01-18 05:29:11,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509448871] [2022-01-18 05:29:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:11,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:11,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509448871] [2022-01-18 05:29:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509448871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255410146] [2022-01-18 05:29:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:11,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:11,832 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) [2022-01-18 05:29:11,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 05:29:11,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:29:11,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:12,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:12,026 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 15 [2022-01-18 05:29:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:12,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:12,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255410146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:12,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:12,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:29:12,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095805936] [2022-01-18 05:29:12,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:12,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:29:12,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:29:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:29:12,429 INFO L87 Difference]: Start difference. First operand 3177 states and 14461 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:29:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:13,086 INFO L93 Difference]: Finished difference Result 3456 states and 15433 transitions. [2022-01-18 05:29:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:29:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 05:29:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:13,095 INFO L225 Difference]: With dead ends: 3456 [2022-01-18 05:29:13,095 INFO L226 Difference]: Without dead ends: 3428 [2022-01-18 05:29:13,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:13,095 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 205 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:13,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 349 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-01-18 05:29:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 3105. [2022-01-18 05:29:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-01-18 05:29:13,144 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-01-18 05:29:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-01-18 05:29:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-01-18 05:29:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-01-18 05:29:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:13,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:13,149 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] [2022-01-18 05:29:13,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:13,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:13,350 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1376425363, now seen corresponding path program 28 times [2022-01-18 05:29:13,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:13,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849518642] [2022-01-18 05:29:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:13,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:13,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849518642] [2022-01-18 05:29:13,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849518642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347173250] [2022-01-18 05:29:13,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:13,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:13,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:13,459 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) [2022-01-18 05:29:13,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 05:29:13,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:13,616 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 15 treesize of output 7 [2022-01-18 05:29:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:13,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:13,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:13,901 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 17 treesize of output 22 [2022-01-18 05:29:13,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:13,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:29:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347173250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:13,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:13,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 05:29:13,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758616129] [2022-01-18 05:29:13,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:29:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:29:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:29:13,977 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:15,073 INFO L93 Difference]: Finished difference Result 3817 states and 16664 transitions. [2022-01-18 05:29:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:29:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:15,083 INFO L225 Difference]: With dead ends: 3817 [2022-01-18 05:29:15,083 INFO L226 Difference]: Without dead ends: 3779 [2022-01-18 05:29:15,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:29:15,083 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 381 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:15,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 542 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:29:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-01-18 05:29:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3105. [2022-01-18 05:29:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-01-18 05:29:15,133 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-01-18 05:29:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:15,133 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-01-18 05:29:15,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-01-18 05:29:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:29:15,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:15,139 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] [2022-01-18 05:29:15,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:15,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:15,339 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1595564283, now seen corresponding path program 29 times [2022-01-18 05:29:15,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563006556] [2022-01-18 05:29:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:15,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:15,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563006556] [2022-01-18 05:29:15,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563006556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275254723] [2022-01-18 05:29:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:15,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:15,434 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) [2022-01-18 05:29:15,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 05:29:15,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:29:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:15,582 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 15 treesize of output 7 [2022-01-18 05:29:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:15,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:15,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:15,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 05:29:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:15,860 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 17 treesize of output 7 [2022-01-18 05:29:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275254723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:15,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:29:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983202403] [2022-01-18 05:29:15,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:15,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:29:15,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:29:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:29:15,907 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:16,702 INFO L93 Difference]: Finished difference Result 3772 states and 16519 transitions. [2022-01-18 05:29:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:29:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:29:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:16,711 INFO L225 Difference]: With dead ends: 3772 [2022-01-18 05:29:16,711 INFO L226 Difference]: Without dead ends: 3750 [2022-01-18 05:29:16,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:29:16,712 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 356 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:16,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 399 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:29:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-01-18 05:29:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3063. [2022-01-18 05:29:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.561071195297191) internal successors, (13966), 3062 states have internal predecessors, (13966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 13966 transitions. [2022-01-18 05:29:16,760 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 13966 transitions. Word has length 29 [2022-01-18 05:29:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 13966 transitions. [2022-01-18 05:29:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 13966 transitions. [2022-01-18 05:29:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:16,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:16,765 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, 1] [2022-01-18 05:29:16,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:16,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:16,965 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1771622066, now seen corresponding path program 30 times [2022-01-18 05:29:16,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:16,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096489288] [2022-01-18 05:29:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:16,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:16,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096489288] [2022-01-18 05:29:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096489288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570980768] [2022-01-18 05:29:16,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:16,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:16,990 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) [2022-01-18 05:29:16,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 05:29:17,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:29:17,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:17,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:29:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:17,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570980768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:17,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:17,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 05:29:17,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416562090] [2022-01-18 05:29:17,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:17,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:29:17,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:29:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:29:17,122 INFO L87 Difference]: Start difference. First operand 3063 states and 13966 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2022-01-18 05:29:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:17,255 INFO L93 Difference]: Finished difference Result 4340 states and 18961 transitions. [2022-01-18 05:29:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:29:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 31 [2022-01-18 05:29:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:17,266 INFO L225 Difference]: With dead ends: 4340 [2022-01-18 05:29:17,266 INFO L226 Difference]: Without dead ends: 4261 [2022-01-18 05:29:17,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:29:17,266 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:17,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 125 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2022-01-18 05:29:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3845. [2022-01-18 05:29:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 4.522372528616025) internal successors, (17384), 3844 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 17384 transitions. [2022-01-18 05:29:17,330 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 17384 transitions. Word has length 31 [2022-01-18 05:29:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:17,330 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 17384 transitions. [2022-01-18 05:29:17,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2022-01-18 05:29:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 17384 transitions. [2022-01-18 05:29:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:17,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:17,337 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, 1] [2022-01-18 05:29:17,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:17,538 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,SelfDestructingSolverStorable122 [2022-01-18 05:29:17,538 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1488366286, now seen corresponding path program 31 times [2022-01-18 05:29:17,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511030788] [2022-01-18 05:29:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:17,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:17,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:17,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511030788] [2022-01-18 05:29:17,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511030788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:17,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15016720] [2022-01-18 05:29:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:17,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:17,562 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) [2022-01-18 05:29:17,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 05:29:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:29:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:17,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:17,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15016720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:17,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 05:29:17,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502125771] [2022-01-18 05:29:17,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:29:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:29:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:29:17,685 INFO L87 Difference]: Start difference. First operand 3845 states and 17384 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2022-01-18 05:29:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:17,813 INFO L93 Difference]: Finished difference Result 4766 states and 20563 transitions. [2022-01-18 05:29:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:29:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 31 [2022-01-18 05:29:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:17,824 INFO L225 Difference]: With dead ends: 4766 [2022-01-18 05:29:17,824 INFO L226 Difference]: Without dead ends: 4649 [2022-01-18 05:29:17,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:29:17,824 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:17,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 96 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-01-18 05:29:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3802. [2022-01-18 05:29:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.468297816364115) internal successors, (16984), 3801 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 16984 transitions. [2022-01-18 05:29:17,894 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 16984 transitions. Word has length 31 [2022-01-18 05:29:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:17,894 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 16984 transitions. [2022-01-18 05:29:17,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2022-01-18 05:29:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 16984 transitions. [2022-01-18 05:29:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:17,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:17,901 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, 1] [2022-01-18 05:29:17,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 05:29:18,101 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,SelfDestructingSolverStorable123 [2022-01-18 05:29:18,101 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1280168432, now seen corresponding path program 32 times [2022-01-18 05:29:18,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339503939] [2022-01-18 05:29:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:18,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:18,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:18,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339503939] [2022-01-18 05:29:18,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339503939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:18,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803754687] [2022-01-18 05:29:18,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:18,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:18,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:18,127 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) [2022-01-18 05:29:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 05:29:18,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:29:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803754687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:18,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 05:29:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036593294] [2022-01-18 05:29:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:29:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:29:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:29:18,271 INFO L87 Difference]: Start difference. First operand 3802 states and 16984 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2022-01-18 05:29:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:18,590 INFO L93 Difference]: Finished difference Result 6625 states and 27941 transitions. [2022-01-18 05:29:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:29:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 31 [2022-01-18 05:29:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:18,605 INFO L225 Difference]: With dead ends: 6625 [2022-01-18 05:29:18,606 INFO L226 Difference]: Without dead ends: 6329 [2022-01-18 05:29:18,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:29:18,606 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:18,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 415 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:29:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-01-18 05:29:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5398. [2022-01-18 05:29:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5397 states have (on average 4.405039836946452) internal successors, (23774), 5397 states have internal predecessors, (23774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 23774 transitions. [2022-01-18 05:29:18,707 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 23774 transitions. Word has length 31 [2022-01-18 05:29:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:18,707 INFO L470 AbstractCegarLoop]: Abstraction has 5398 states and 23774 transitions. [2022-01-18 05:29:18,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2022-01-18 05:29:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 23774 transitions. [2022-01-18 05:29:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:18,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:18,742 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, 1] [2022-01-18 05:29:18,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 05:29:18,943 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,SelfDestructingSolverStorable124 [2022-01-18 05:29:18,943 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:18,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1366492460, now seen corresponding path program 33 times [2022-01-18 05:29:18,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:18,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864053223] [2022-01-18 05:29:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:18,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:18,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864053223] [2022-01-18 05:29:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864053223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3600042] [2022-01-18 05:29:18,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:18,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:18,981 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) [2022-01-18 05:29:18,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 05:29:19,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:29:19,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:29:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3600042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:19,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:19,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 05:29:19,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061435251] [2022-01-18 05:29:19,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:19,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:29:19,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:29:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:29:19,116 INFO L87 Difference]: Start difference. First operand 5398 states and 23774 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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) [2022-01-18 05:29:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:19,259 INFO L93 Difference]: Finished difference Result 6291 states and 26930 transitions. [2022-01-18 05:29:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:29:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 31 [2022-01-18 05:29:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:19,276 INFO L225 Difference]: With dead ends: 6291 [2022-01-18 05:29:19,276 INFO L226 Difference]: Without dead ends: 6219 [2022-01-18 05:29:19,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:29:19,277 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:19,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-01-18 05:29:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5455. [2022-01-18 05:29:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 4.364869820315365) internal successors, (23806), 5454 states have internal predecessors, (23806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 23806 transitions. [2022-01-18 05:29:19,381 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 23806 transitions. Word has length 31 [2022-01-18 05:29:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:19,381 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 23806 transitions. [2022-01-18 05:29:19,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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) [2022-01-18 05:29:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 23806 transitions. [2022-01-18 05:29:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:19,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:19,390 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, 1] [2022-01-18 05:29:19,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:19,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 05:29:19,591 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -540684862, now seen corresponding path program 34 times [2022-01-18 05:29:19,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053489177] [2022-01-18 05:29:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:19,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:19,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053489177] [2022-01-18 05:29:19,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053489177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:19,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813328398] [2022-01-18 05:29:19,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:19,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:19,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:19,617 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) [2022-01-18 05:29:19,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 05:29:19,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:19,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:29:19,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813328398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:19,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:19,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2022-01-18 05:29:19,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712285468] [2022-01-18 05:29:19,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:19,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:29:19,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:29:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:29:19,742 INFO L87 Difference]: Start difference. First operand 5455 states and 23806 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2022-01-18 05:29:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:19,858 INFO L93 Difference]: Finished difference Result 7534 states and 32027 transitions. [2022-01-18 05:29:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:29:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 31 [2022-01-18 05:29:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:19,877 INFO L225 Difference]: With dead ends: 7534 [2022-01-18 05:29:19,877 INFO L226 Difference]: Without dead ends: 7474 [2022-01-18 05:29:19,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:29:19,877 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 181 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:19,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 125 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-18 05:29:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 6583. [2022-01-18 05:29:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.39364934670313) internal successors, (28919), 6582 states have internal predecessors, (28919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 28919 transitions. [2022-01-18 05:29:20,073 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 28919 transitions. Word has length 31 [2022-01-18 05:29:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 28919 transitions. [2022-01-18 05:29:20,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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) [2022-01-18 05:29:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 28919 transitions. [2022-01-18 05:29:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:20,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:20,086 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, 1] [2022-01-18 05:29:20,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 05:29:20,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:20,288 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash 552518790, now seen corresponding path program 35 times [2022-01-18 05:29:20,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:20,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715486406] [2022-01-18 05:29:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:20,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:20,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715486406] [2022-01-18 05:29:20,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715486406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197194532] [2022-01-18 05:29:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:20,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:20,318 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) [2022-01-18 05:29:20,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 05:29:20,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:29:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:20,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:20,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197194532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:20,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:20,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 05:29:20,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519551672] [2022-01-18 05:29:20,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:20,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:29:20,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:29:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:29:20,440 INFO L87 Difference]: Start difference. First operand 6583 states and 28919 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2022-01-18 05:29:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:20,564 INFO L93 Difference]: Finished difference Result 8243 states and 34954 transitions. [2022-01-18 05:29:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:29:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 31 [2022-01-18 05:29:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:20,586 INFO L225 Difference]: With dead ends: 8243 [2022-01-18 05:29:20,586 INFO L226 Difference]: Without dead ends: 8171 [2022-01-18 05:29:20,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:29:20,587 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:20,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 88 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2022-01-18 05:29:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 6493. [2022-01-18 05:29:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6493 states, 6492 states have (on average 4.386167590881084) internal successors, (28475), 6492 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 28475 transitions. [2022-01-18 05:29:20,723 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 28475 transitions. Word has length 31 [2022-01-18 05:29:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:20,723 INFO L470 AbstractCegarLoop]: Abstraction has 6493 states and 28475 transitions. [2022-01-18 05:29:20,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2022-01-18 05:29:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 28475 transitions. [2022-01-18 05:29:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:20,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:20,739 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, 1] [2022-01-18 05:29:20,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:20,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:20,962 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:20,962 INFO L85 PathProgramCache]: Analyzing trace with hash 891076900, now seen corresponding path program 36 times [2022-01-18 05:29:20,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:20,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225810039] [2022-01-18 05:29:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:20,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:20,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225810039] [2022-01-18 05:29:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225810039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18586909] [2022-01-18 05:29:20,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:20,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:20,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:20,985 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) [2022-01-18 05:29:20,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 05:29:21,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:29:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:29:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18586909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:21,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:21,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 05:29:21,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116902423] [2022-01-18 05:29:21,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:21,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:29:21,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:29:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:29:21,115 INFO L87 Difference]: Start difference. First operand 6493 states and 28475 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2022-01-18 05:29:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:21,263 INFO L93 Difference]: Finished difference Result 8162 states and 34539 transitions. [2022-01-18 05:29:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:29:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 31 [2022-01-18 05:29:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:21,286 INFO L225 Difference]: With dead ends: 8162 [2022-01-18 05:29:21,286 INFO L226 Difference]: Without dead ends: 8084 [2022-01-18 05:29:21,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:29:21,286 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:21,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 120 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:29:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-01-18 05:29:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 6864. [2022-01-18 05:29:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 4.390936908057701) internal successors, (30135), 6863 states have internal predecessors, (30135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 30135 transitions. [2022-01-18 05:29:21,463 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 30135 transitions. Word has length 31 [2022-01-18 05:29:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:21,463 INFO L470 AbstractCegarLoop]: Abstraction has 6864 states and 30135 transitions. [2022-01-18 05:29:21,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2022-01-18 05:29:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 30135 transitions. [2022-01-18 05:29:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:29:21,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:21,476 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, 1] [2022-01-18 05:29:21,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 05:29:21,677 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,SelfDestructingSolverStorable128 [2022-01-18 05:29:21,677 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -457763008, now seen corresponding path program 37 times [2022-01-18 05:29:21,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129394376] [2022-01-18 05:29:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:21,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129394376] [2022-01-18 05:29:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129394376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725365129] [2022-01-18 05:29:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:21,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:21,716 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) [2022-01-18 05:29:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 05:29:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:21,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:29:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725365129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:21,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:21,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 05:29:21,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131345695] [2022-01-18 05:29:21,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:21,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:29:21,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:29:21,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:29:21,850 INFO L87 Difference]: Start difference. First operand 6864 states and 30135 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2022-01-18 05:29:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:22,079 INFO L93 Difference]: Finished difference Result 8640 states and 36644 transitions. [2022-01-18 05:29:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:29:22,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 31 [2022-01-18 05:29:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:22,101 INFO L225 Difference]: With dead ends: 8640 [2022-01-18 05:29:22,101 INFO L226 Difference]: Without dead ends: 8442 [2022-01-18 05:29:22,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:29:22,102 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 165 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:22,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 274 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:29:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-01-18 05:29:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7525. [2022-01-18 05:29:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7525 states, 7524 states have (on average 4.365629984051036) internal successors, (32847), 7524 states have internal predecessors, (32847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7525 states to 7525 states and 32847 transitions. [2022-01-18 05:29:22,326 INFO L78 Accepts]: Start accepts. Automaton has 7525 states and 32847 transitions. Word has length 31 [2022-01-18 05:29:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:22,326 INFO L470 AbstractCegarLoop]: Abstraction has 7525 states and 32847 transitions. [2022-01-18 05:29:22,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2022-01-18 05:29:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7525 states and 32847 transitions. [2022-01-18 05:29:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:22,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:22,340 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, 1, 1, 1] [2022-01-18 05:29:22,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 05:29:22,540 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,SelfDestructingSolverStorable129 [2022-01-18 05:29:22,540 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1383538257, now seen corresponding path program 38 times [2022-01-18 05:29:22,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:22,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201350320] [2022-01-18 05:29:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:22,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:22,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201350320] [2022-01-18 05:29:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201350320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013936486] [2022-01-18 05:29:22,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:22,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:22,757 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) [2022-01-18 05:29:22,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 05:29:22,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:23,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:23,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 05:29:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:23,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:24,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:24,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:29:24,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:24,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:29:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:24,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013936486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:24,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:24,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:29:24,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439119266] [2022-01-18 05:29:24,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:24,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:29:24,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:29:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:29:24,226 INFO L87 Difference]: Start difference. First operand 7525 states and 32847 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:29:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:25,888 INFO L93 Difference]: Finished difference Result 8385 states and 36348 transitions. [2022-01-18 05:29:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:29:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 33 [2022-01-18 05:29:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:25,915 INFO L225 Difference]: With dead ends: 8385 [2022-01-18 05:29:25,915 INFO L226 Difference]: Without dead ends: 8374 [2022-01-18 05:29:25,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:29:25,915 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 278 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:25,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 921 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2634 Invalid, 0 Unknown, 230 Unchecked, 1.1s Time] [2022-01-18 05:29:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2022-01-18 05:29:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 7658. [2022-01-18 05:29:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.354969309128902) internal successors, (33346), 7657 states have internal predecessors, (33346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 33346 transitions. [2022-01-18 05:29:26,087 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 33346 transitions. Word has length 33 [2022-01-18 05:29:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 7658 states and 33346 transitions. [2022-01-18 05:29:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:29:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 33346 transitions. [2022-01-18 05:29:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:26,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:26,103 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, 1, 1, 1] [2022-01-18 05:29:26,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:26,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:26,304 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 565140729, now seen corresponding path program 39 times [2022-01-18 05:29:26,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791405848] [2022-01-18 05:29:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:26,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:26,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791405848] [2022-01-18 05:29:26,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791405848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114153321] [2022-01-18 05:29:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:26,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:26,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:26,499 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) [2022-01-18 05:29:26,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 05:29:26,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:29:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:29:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:26,950 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 05:29:26,951 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 05:29:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:27,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:27,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114153321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:27,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:27,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 05:29:27,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643072258] [2022-01-18 05:29:27,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:27,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:29:27,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:29:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:29:27,557 INFO L87 Difference]: Start difference. First operand 7658 states and 33346 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:31,582 INFO L93 Difference]: Finished difference Result 9540 states and 40443 transitions. [2022-01-18 05:29:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:29:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:31,609 INFO L225 Difference]: With dead ends: 9540 [2022-01-18 05:29:31,609 INFO L226 Difference]: Without dead ends: 9494 [2022-01-18 05:29:31,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=577, Invalid=6065, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 05:29:31,610 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1049 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:31,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 1221 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:29:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2022-01-18 05:29:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 7670. [2022-01-18 05:29:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 4.362759160255575) internal successors, (33458), 7669 states have internal predecessors, (33458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 33458 transitions. [2022-01-18 05:29:31,823 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 33458 transitions. Word has length 33 [2022-01-18 05:29:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:31,823 INFO L470 AbstractCegarLoop]: Abstraction has 7670 states and 33458 transitions. [2022-01-18 05:29:31,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 33458 transitions. [2022-01-18 05:29:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:31,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:31,838 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, 1, 1, 1] [2022-01-18 05:29:31,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:32,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:32,039 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 692613113, now seen corresponding path program 40 times [2022-01-18 05:29:32,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:32,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976660900] [2022-01-18 05:29:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:32,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:32,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:32,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976660900] [2022-01-18 05:29:32,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976660900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:32,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493474754] [2022-01-18 05:29:32,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:32,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:32,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:32,225 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) [2022-01-18 05:29:32,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 05:29:32,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:32,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:32,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:32,672 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 37 treesize of output 21 [2022-01-18 05:29:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:32,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:33,086 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:33,086 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 [2022-01-18 05:29:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:33,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:33,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:33,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:33,172 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 27 treesize of output 7 [2022-01-18 05:29:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:33,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493474754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:33,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:33,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:33,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356951317] [2022-01-18 05:29:33,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:33,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:33,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:33,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:33,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:33,221 INFO L87 Difference]: Start difference. First operand 7670 states and 33458 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:35,216 INFO L93 Difference]: Finished difference Result 8309 states and 35933 transitions. [2022-01-18 05:29:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:29:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:35,238 INFO L225 Difference]: With dead ends: 8309 [2022-01-18 05:29:35,239 INFO L226 Difference]: Without dead ends: 8290 [2022-01-18 05:29:35,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:29:35,239 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 326 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:35,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1073 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:29:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-01-18 05:29:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 7729. [2022-01-18 05:29:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7729 states, 7728 states have (on average 4.359989648033126) internal successors, (33694), 7728 states have internal predecessors, (33694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 33694 transitions. [2022-01-18 05:29:35,375 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 33694 transitions. Word has length 33 [2022-01-18 05:29:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:35,375 INFO L470 AbstractCegarLoop]: Abstraction has 7729 states and 33694 transitions. [2022-01-18 05:29:35,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 33694 transitions. [2022-01-18 05:29:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:35,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:35,390 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, 1, 1, 1] [2022-01-18 05:29:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:35,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:35,590 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash 241367945, now seen corresponding path program 41 times [2022-01-18 05:29:35,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:35,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488632103] [2022-01-18 05:29:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:35,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:35,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488632103] [2022-01-18 05:29:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488632103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513065669] [2022-01-18 05:29:35,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:35,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:35,791 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) [2022-01-18 05:29:35,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 05:29:35,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:35,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:36,298 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 05:29:36,298 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 05:29:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:36,763 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:36,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:29:36,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:36,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:36,835 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 7 [2022-01-18 05:29:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:36,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513065669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:36,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:36,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:36,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887125620] [2022-01-18 05:29:36,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:36,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:36,885 INFO L87 Difference]: Start difference. First operand 7729 states and 33694 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:39,033 INFO L93 Difference]: Finished difference Result 8675 states and 37341 transitions. [2022-01-18 05:29:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:29:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:39,056 INFO L225 Difference]: With dead ends: 8675 [2022-01-18 05:29:39,057 INFO L226 Difference]: Without dead ends: 8664 [2022-01-18 05:29:39,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:29:39,057 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 399 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:39,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1339 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3484 Invalid, 0 Unknown, 201 Unchecked, 1.5s Time] [2022-01-18 05:29:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2022-01-18 05:29:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7829. [2022-01-18 05:29:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 4.357051609606541) internal successors, (34107), 7828 states have internal predecessors, (34107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 34107 transitions. [2022-01-18 05:29:39,207 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 34107 transitions. Word has length 33 [2022-01-18 05:29:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 7829 states and 34107 transitions. [2022-01-18 05:29:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 34107 transitions. [2022-01-18 05:29:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:39,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:39,222 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, 1, 1, 1] [2022-01-18 05:29:39,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 05:29:39,422 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,SelfDestructingSolverStorable133 [2022-01-18 05:29:39,422 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1128871626, now seen corresponding path program 1 times [2022-01-18 05:29:39,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:39,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125139135] [2022-01-18 05:29:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:39,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:39,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:39,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125139135] [2022-01-18 05:29:39,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125139135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:39,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094684400] [2022-01-18 05:29:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:39,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:39,636 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) [2022-01-18 05:29:39,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 05:29:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:40,097 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 05:29:40,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 05:29:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:40,552 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:40,552 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 [2022-01-18 05:29:40,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:40,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:29:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:40,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094684400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:40,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:40,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:40,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292612288] [2022-01-18 05:29:40,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:40,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:40,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:40,689 INFO L87 Difference]: Start difference. First operand 7829 states and 34107 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:42,677 INFO L93 Difference]: Finished difference Result 8629 states and 37111 transitions. [2022-01-18 05:29:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:29:42,678 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:42,701 INFO L225 Difference]: With dead ends: 8629 [2022-01-18 05:29:42,701 INFO L226 Difference]: Without dead ends: 8616 [2022-01-18 05:29:42,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:29:42,702 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 475 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1064 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3137 Invalid, 0 Unknown, 24 Unchecked, 1.2s Time] [2022-01-18 05:29:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-01-18 05:29:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 7857. [2022-01-18 05:29:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7856 states have (on average 4.355269857433808) internal successors, (34215), 7856 states have internal predecessors, (34215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 34215 transitions. [2022-01-18 05:29:42,849 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 34215 transitions. Word has length 33 [2022-01-18 05:29:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 7857 states and 34215 transitions. [2022-01-18 05:29:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 34215 transitions. [2022-01-18 05:29:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:42,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:42,864 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, 1, 1, 1] [2022-01-18 05:29:42,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 05:29:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 05:29:43,064 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1984178280, now seen corresponding path program 1 times [2022-01-18 05:29:43,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944131691] [2022-01-18 05:29:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:43,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:43,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944131691] [2022-01-18 05:29:43,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944131691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288509339] [2022-01-18 05:29:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:43,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:43,260 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) [2022-01-18 05:29:43,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 05:29:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:43,776 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 05:29:43,776 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 05:29:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:43,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:44,234 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:44,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:29:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:44,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:44,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:44,338 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 7 [2022-01-18 05:29:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:44,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288509339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:44,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:44,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583344393] [2022-01-18 05:29:44,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:44,387 INFO L87 Difference]: Start difference. First operand 7857 states and 34215 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:46,542 INFO L93 Difference]: Finished difference Result 8645 states and 37144 transitions. [2022-01-18 05:29:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:29:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:46,566 INFO L225 Difference]: With dead ends: 8645 [2022-01-18 05:29:46,566 INFO L226 Difference]: Without dead ends: 8632 [2022-01-18 05:29:46,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:29:46,567 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 407 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:46,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1234 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3538 Invalid, 0 Unknown, 87 Unchecked, 1.4s Time] [2022-01-18 05:29:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-01-18 05:29:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7849. [2022-01-18 05:29:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7849 states, 7848 states have (on average 4.356651376146789) internal successors, (34191), 7848 states have internal predecessors, (34191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 34191 transitions. [2022-01-18 05:29:46,720 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 34191 transitions. Word has length 33 [2022-01-18 05:29:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:46,720 INFO L470 AbstractCegarLoop]: Abstraction has 7849 states and 34191 transitions. [2022-01-18 05:29:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 34191 transitions. [2022-01-18 05:29:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:46,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:46,735 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, 1, 1, 1] [2022-01-18 05:29:46,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 05:29:46,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 05:29:46,936 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1423285335, now seen corresponding path program 1 times [2022-01-18 05:29:46,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929415312] [2022-01-18 05:29:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:46,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:47,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929415312] [2022-01-18 05:29:47,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929415312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796145280] [2022-01-18 05:29:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:47,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:47,118 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) [2022-01-18 05:29:47,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 05:29:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:47,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:47,565 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 37 treesize of output 21 [2022-01-18 05:29:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:47,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:48,011 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:48,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:29:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,074 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 7 [2022-01-18 05:29:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796145280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:48,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:48,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862724993] [2022-01-18 05:29:48,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:48,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:48,122 INFO L87 Difference]: Start difference. First operand 7849 states and 34191 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:50,548 INFO L93 Difference]: Finished difference Result 8653 states and 37168 transitions. [2022-01-18 05:29:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:29:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:50,572 INFO L225 Difference]: With dead ends: 8653 [2022-01-18 05:29:50,573 INFO L226 Difference]: Without dead ends: 8611 [2022-01-18 05:29:50,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2825, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:29:50,573 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 4303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:50,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1325 Invalid, 4303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:29:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2022-01-18 05:29:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 7789. [2022-01-18 05:29:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7789 states, 7788 states have (on average 4.363764766307139) internal successors, (33985), 7788 states have internal predecessors, (33985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7789 states to 7789 states and 33985 transitions. [2022-01-18 05:29:50,725 INFO L78 Accepts]: Start accepts. Automaton has 7789 states and 33985 transitions. Word has length 33 [2022-01-18 05:29:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:50,725 INFO L470 AbstractCegarLoop]: Abstraction has 7789 states and 33985 transitions. [2022-01-18 05:29:50,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7789 states and 33985 transitions. [2022-01-18 05:29:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:50,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:50,740 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, 1, 1, 1] [2022-01-18 05:29:50,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 05:29:50,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 05:29:50,940 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1341675749, now seen corresponding path program 42 times [2022-01-18 05:29:50,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:50,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676893905] [2022-01-18 05:29:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:50,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:51,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676893905] [2022-01-18 05:29:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676893905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842224726] [2022-01-18 05:29:51,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:51,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:51,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:51,128 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) [2022-01-18 05:29:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 05:29:51,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:29:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:51,595 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:29:51,595 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-01-18 05:29:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:52,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842224726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:52,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:52,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:29:52,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428459937] [2022-01-18 05:29:52,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:52,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:29:52,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:29:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:29:52,252 INFO L87 Difference]: Start difference. First operand 7789 states and 33985 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:56,553 INFO L93 Difference]: Finished difference Result 9429 states and 39923 transitions. [2022-01-18 05:29:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:29:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:29:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:56,579 INFO L225 Difference]: With dead ends: 9429 [2022-01-18 05:29:56,579 INFO L226 Difference]: Without dead ends: 9391 [2022-01-18 05:29:56,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=630, Invalid=6510, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 05:29:56,580 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1010 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:56,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1371 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:29:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-01-18 05:29:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7804. [2022-01-18 05:29:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 4.362040240932974) internal successors, (34037), 7803 states have internal predecessors, (34037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 34037 transitions. [2022-01-18 05:29:56,782 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 34037 transitions. Word has length 33 [2022-01-18 05:29:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:56,782 INFO L470 AbstractCegarLoop]: Abstraction has 7804 states and 34037 transitions. [2022-01-18 05:29:56,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 34037 transitions. [2022-01-18 05:29:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:29:56,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:56,797 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, 1, 1, 1] [2022-01-18 05:29:56,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 05:29:56,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:56,999 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:29:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1905273173, now seen corresponding path program 43 times [2022-01-18 05:29:56,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131511009] [2022-01-18 05:29:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:56,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:57,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:57,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131511009] [2022-01-18 05:29:57,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131511009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:57,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487692851] [2022-01-18 05:29:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:57,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:57,220 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) [2022-01-18 05:29:57,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 05:29:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:29:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:57,611 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 37 treesize of output 21 [2022-01-18 05:29:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:57,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:58,036 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:29:58,037 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 [2022-01-18 05:29:58,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:58,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:58,101 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 7 [2022-01-18 05:29:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:58,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487692851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:58,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:58,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:29:58,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051453619] [2022-01-18 05:29:58,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:58,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:29:58,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:29:58,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:29:58,149 INFO L87 Difference]: Start difference. First operand 7804 states and 34037 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:01,028 INFO L93 Difference]: Finished difference Result 10276 states and 43727 transitions. [2022-01-18 05:30:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:30:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:01,056 INFO L225 Difference]: With dead ends: 10276 [2022-01-18 05:30:01,057 INFO L226 Difference]: Without dead ends: 10227 [2022-01-18 05:30:01,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:30:01,057 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 811 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 4759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 4202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:01,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1362 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4202 Invalid, 0 Unknown, 472 Unchecked, 1.7s Time] [2022-01-18 05:30:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2022-01-18 05:30:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 7888. [2022-01-18 05:30:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 4.363129199949284) internal successors, (34412), 7887 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 34412 transitions. [2022-01-18 05:30:01,275 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 34412 transitions. Word has length 33 [2022-01-18 05:30:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:01,275 INFO L470 AbstractCegarLoop]: Abstraction has 7888 states and 34412 transitions. [2022-01-18 05:30:01,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 34412 transitions. [2022-01-18 05:30:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:01,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:01,291 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, 1, 1, 1] [2022-01-18 05:30:01,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 05:30:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 05:30:01,491 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469117, now seen corresponding path program 44 times [2022-01-18 05:30:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693573654] [2022-01-18 05:30:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:01,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693573654] [2022-01-18 05:30:01,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693573654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703105860] [2022-01-18 05:30:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:01,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:01,715 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) [2022-01-18 05:30:01,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 05:30:01,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:02,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:02,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:30:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:02,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:02,721 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 17 treesize of output 22 [2022-01-18 05:30:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:02,730 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 17 treesize of output 7 [2022-01-18 05:30:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:02,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703105860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:02,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:30:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372068779] [2022-01-18 05:30:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:02,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:02,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:02,779 INFO L87 Difference]: Start difference. First operand 7888 states and 34412 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 05:30:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:04,056 INFO L93 Difference]: Finished difference Result 8300 states and 35943 transitions. [2022-01-18 05:30:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:30:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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 33 [2022-01-18 05:30:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:04,079 INFO L225 Difference]: With dead ends: 8300 [2022-01-18 05:30:04,079 INFO L226 Difference]: Without dead ends: 8289 [2022-01-18 05:30:04,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:30:04,080 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 343 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:04,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 678 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2173 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-01-18 05:30:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2022-01-18 05:30:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7894. [2022-01-18 05:30:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7894 states, 7893 states have (on average 4.362219688331433) internal successors, (34431), 7893 states have internal predecessors, (34431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 34431 transitions. [2022-01-18 05:30:04,221 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 34431 transitions. Word has length 33 [2022-01-18 05:30:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:04,221 INFO L470 AbstractCegarLoop]: Abstraction has 7894 states and 34431 transitions. [2022-01-18 05:30:04,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 05:30:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 34431 transitions. [2022-01-18 05:30:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:04,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:04,236 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, 1, 1, 1] [2022-01-18 05:30:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:04,436 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1821955612, now seen corresponding path program 2 times [2022-01-18 05:30:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742809855] [2022-01-18 05:30:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:04,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:04,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742809855] [2022-01-18 05:30:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742809855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379793996] [2022-01-18 05:30:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:04,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:04,620 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) [2022-01-18 05:30:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 05:30:04,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:05,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:05,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:30:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:05,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:05,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:05,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:30:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:05,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:30:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379793996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:05,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:05,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:30:05,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883317741] [2022-01-18 05:30:05,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:05,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:05,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:05,649 INFO L87 Difference]: Start difference. First operand 7894 states and 34431 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 05:30:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:07,146 INFO L93 Difference]: Finished difference Result 8300 states and 35942 transitions. [2022-01-18 05:30:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:30:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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 33 [2022-01-18 05:30:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:07,168 INFO L225 Difference]: With dead ends: 8300 [2022-01-18 05:30:07,168 INFO L226 Difference]: Without dead ends: 8287 [2022-01-18 05:30:07,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:30:07,169 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 272 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:07,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 892 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2787 Invalid, 0 Unknown, 279 Unchecked, 1.0s Time] [2022-01-18 05:30:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2022-01-18 05:30:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 7881. [2022-01-18 05:30:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 4.364213197969543) internal successors, (34390), 7880 states have internal predecessors, (34390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 34390 transitions. [2022-01-18 05:30:07,316 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 34390 transitions. Word has length 33 [2022-01-18 05:30:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:07,316 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 34390 transitions. [2022-01-18 05:30:07,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 05:30:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 34390 transitions. [2022-01-18 05:30:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:07,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:07,332 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, 1, 1, 1] [2022-01-18 05:30:07,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 05:30:07,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:07,532 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash -300920175, now seen corresponding path program 45 times [2022-01-18 05:30:07,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627185871] [2022-01-18 05:30:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:07,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:07,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627185871] [2022-01-18 05:30:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627185871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361959849] [2022-01-18 05:30:07,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:07,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:07,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:07,764 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) [2022-01-18 05:30:07,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 05:30:07,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:07,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:30:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:08,229 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:30:08,229 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 29 treesize of output 55 [2022-01-18 05:30:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:08,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:08,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361959849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:08,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:08,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:30:08,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781215640] [2022-01-18 05:30:08,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:30:08,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:30:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:30:08,866 INFO L87 Difference]: Start difference. First operand 7881 states and 34390 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:13,762 INFO L93 Difference]: Finished difference Result 10866 states and 45556 transitions. [2022-01-18 05:30:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 05:30:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:13,791 INFO L225 Difference]: With dead ends: 10866 [2022-01-18 05:30:13,792 INFO L226 Difference]: Without dead ends: 10828 [2022-01-18 05:30:13,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=753, Invalid=8177, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:30:13,793 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1115 mSDsluCounter, 4261 mSDsCounter, 0 mSdLazyCounter, 5170 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 5356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 5170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:13,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1682 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 5170 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:30:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2022-01-18 05:30:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 7959. [2022-01-18 05:30:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 4.369188238250817) internal successors, (34770), 7958 states have internal predecessors, (34770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 34770 transitions. [2022-01-18 05:30:14,039 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 34770 transitions. Word has length 33 [2022-01-18 05:30:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:14,039 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 34770 transitions. [2022-01-18 05:30:14,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 34770 transitions. [2022-01-18 05:30:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:14,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:14,054 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, 1, 1, 1] [2022-01-18 05:30:14,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 05:30:14,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:14,255 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1235742605, now seen corresponding path program 46 times [2022-01-18 05:30:14,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:14,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70403559] [2022-01-18 05:30:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:14,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:14,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:14,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70403559] [2022-01-18 05:30:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70403559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543673562] [2022-01-18 05:30:14,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:14,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:14,433 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) [2022-01-18 05:30:14,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 05:30:14,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:14,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:14,822 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 37 treesize of output 21 [2022-01-18 05:30:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:15,233 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:30:15,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:30:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:15,298 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 7 [2022-01-18 05:30:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:15,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543673562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:15,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:15,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:30:15,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993492089] [2022-01-18 05:30:15,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:30:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:30:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:30:15,348 INFO L87 Difference]: Start difference. First operand 7959 states and 34770 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:17,464 INFO L93 Difference]: Finished difference Result 9194 states and 39385 transitions. [2022-01-18 05:30:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:30:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:17,488 INFO L225 Difference]: With dead ends: 9194 [2022-01-18 05:30:17,488 INFO L226 Difference]: Without dead ends: 9166 [2022-01-18 05:30:17,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:30:17,489 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 515 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 4130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:17,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1257 Invalid, 4130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4005 Invalid, 0 Unknown, 81 Unchecked, 1.6s Time] [2022-01-18 05:30:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2022-01-18 05:30:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 8022. [2022-01-18 05:30:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.364792419897769) internal successors, (35010), 8021 states have internal predecessors, (35010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35010 transitions. [2022-01-18 05:30:17,648 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35010 transitions. Word has length 33 [2022-01-18 05:30:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:17,648 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 35010 transitions. [2022-01-18 05:30:17,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35010 transitions. [2022-01-18 05:30:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:17,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:17,663 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, 1, 1, 1] [2022-01-18 05:30:17,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 05:30:17,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:17,864 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1432256110, now seen corresponding path program 3 times [2022-01-18 05:30:17,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917155596] [2022-01-18 05:30:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:17,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:18,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917155596] [2022-01-18 05:30:18,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917155596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682723903] [2022-01-18 05:30:18,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:18,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:18,136 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) [2022-01-18 05:30:18,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 05:30:18,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:30:18,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:18,616 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:30:18,616 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 33 treesize of output 57 [2022-01-18 05:30:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:19,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682723903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:19,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:19,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 05:30:19,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15483826] [2022-01-18 05:30:19,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:19,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:30:19,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:30:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:30:19,204 INFO L87 Difference]: Start difference. First operand 8022 states and 35010 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:23,219 INFO L93 Difference]: Finished difference Result 10657 states and 44581 transitions. [2022-01-18 05:30:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 05:30:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:23,248 INFO L225 Difference]: With dead ends: 10657 [2022-01-18 05:30:23,248 INFO L226 Difference]: Without dead ends: 10631 [2022-01-18 05:30:23,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=672, Invalid=6638, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 05:30:23,249 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1118 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 4572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:23,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 1422 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:30:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-01-18 05:30:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 7990. [2022-01-18 05:30:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 7989 states have (on average 4.365127049693329) internal successors, (34873), 7989 states have internal predecessors, (34873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 34873 transitions. [2022-01-18 05:30:23,423 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 34873 transitions. Word has length 33 [2022-01-18 05:30:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 34873 transitions. [2022-01-18 05:30:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 34873 transitions. [2022-01-18 05:30:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:23,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:23,438 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, 1, 1, 1] [2022-01-18 05:30:23,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:23,638 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,SelfDestructingSolverStorable143 [2022-01-18 05:30:23,639 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1876450095, now seen corresponding path program 47 times [2022-01-18 05:30:23,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136509322] [2022-01-18 05:30:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:23,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:23,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136509322] [2022-01-18 05:30:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136509322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167697558] [2022-01-18 05:30:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:30:23,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:23,894 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) [2022-01-18 05:30:23,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 05:30:23,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:30:23,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:24,267 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 37 treesize of output 21 [2022-01-18 05:30:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:24,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:24,718 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:30:24,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:30:24,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:24,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:24,785 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 27 treesize of output 7 [2022-01-18 05:30:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167697558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:24,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:24,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:30:24,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832461495] [2022-01-18 05:30:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:24,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:30:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:30:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:30:24,834 INFO L87 Difference]: Start difference. First operand 7990 states and 34873 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:27,334 INFO L93 Difference]: Finished difference Result 9092 states and 39166 transitions. [2022-01-18 05:30:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:30:27,334 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:27,359 INFO L225 Difference]: With dead ends: 9092 [2022-01-18 05:30:27,359 INFO L226 Difference]: Without dead ends: 9054 [2022-01-18 05:30:27,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:30:27,360 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 565 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:27,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1223 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 05:30:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-01-18 05:30:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 8053. [2022-01-18 05:30:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 4.3691008445106805) internal successors, (35180), 8052 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35180 transitions. [2022-01-18 05:30:27,513 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35180 transitions. Word has length 33 [2022-01-18 05:30:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:27,513 INFO L470 AbstractCegarLoop]: Abstraction has 8053 states and 35180 transitions. [2022-01-18 05:30:27,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35180 transitions. [2022-01-18 05:30:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:27,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:27,528 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, 1, 1, 1] [2022-01-18 05:30:27,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 05:30:27,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 05:30:27,729 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 745114160, now seen corresponding path program 4 times [2022-01-18 05:30:27,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:27,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941007340] [2022-01-18 05:30:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:27,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:27,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941007340] [2022-01-18 05:30:27,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941007340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812730085] [2022-01-18 05:30:27,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:27,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:27,925 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) [2022-01-18 05:30:27,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 05:30:27,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:28,304 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 37 treesize of output 21 [2022-01-18 05:30:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:28,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:28,709 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:30:28,709 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 [2022-01-18 05:30:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:28,781 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 7 [2022-01-18 05:30:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:28,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812730085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:28,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:28,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:30:28,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112593902] [2022-01-18 05:30:28,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:30:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:30:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:30:28,834 INFO L87 Difference]: Start difference. First operand 8053 states and 35180 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:31,169 INFO L93 Difference]: Finished difference Result 9208 states and 39560 transitions. [2022-01-18 05:30:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:30:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:31,194 INFO L225 Difference]: With dead ends: 9208 [2022-01-18 05:30:31,194 INFO L226 Difference]: Without dead ends: 9160 [2022-01-18 05:30:31,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:30:31,195 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 616 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:31,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1184 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:30:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-01-18 05:30:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7980. [2022-01-18 05:30:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 4.374232359944855) internal successors, (34902), 7979 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 34902 transitions. [2022-01-18 05:30:31,350 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 34902 transitions. Word has length 33 [2022-01-18 05:30:31,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:31,350 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 34902 transitions. [2022-01-18 05:30:31,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 34902 transitions. [2022-01-18 05:30:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:31,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:31,365 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, 1, 1, 1] [2022-01-18 05:30:31,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:31,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:31,566 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1631151711, now seen corresponding path program 48 times [2022-01-18 05:30:31,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:31,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865606990] [2022-01-18 05:30:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:31,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:31,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865606990] [2022-01-18 05:30:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865606990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714910277] [2022-01-18 05:30:31,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:30:31,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:31,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:31,765 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) [2022-01-18 05:30:31,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 05:30:31,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:30:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:30:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:32,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:32,087 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:30:32,087 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 31 treesize of output 55 [2022-01-18 05:30:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:32,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:32,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714910277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:32,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:32,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-01-18 05:30:32,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255531644] [2022-01-18 05:30:32,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:32,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:30:32,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:30:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:30:32,697 INFO L87 Difference]: Start difference. First operand 7980 states and 34902 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:38,149 INFO L93 Difference]: Finished difference Result 11257 states and 48216 transitions. [2022-01-18 05:30:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:30:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:38,180 INFO L225 Difference]: With dead ends: 11257 [2022-01-18 05:30:38,180 INFO L226 Difference]: Without dead ends: 11187 [2022-01-18 05:30:38,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1015, Invalid=9085, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 05:30:38,181 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1185 mSDsluCounter, 4530 mSDsCounter, 0 mSdLazyCounter, 6253 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 6493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 6253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:38,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1800 Invalid, 6493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 6253 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 05:30:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2022-01-18 05:30:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 8331. [2022-01-18 05:30:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 4.3984393757503) internal successors, (36639), 8330 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 36639 transitions. [2022-01-18 05:30:38,359 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 36639 transitions. Word has length 33 [2022-01-18 05:30:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 8331 states and 36639 transitions. [2022-01-18 05:30:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 36639 transitions. [2022-01-18 05:30:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:38,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:38,374 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, 1, 1, 1] [2022-01-18 05:30:38,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 05:30:38,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 05:30:38,575 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1360542979, now seen corresponding path program 49 times [2022-01-18 05:30:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424953667] [2022-01-18 05:30:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:38,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:38,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424953667] [2022-01-18 05:30:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424953667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600712217] [2022-01-18 05:30:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:30:38,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:38,808 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) [2022-01-18 05:30:38,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 05:30:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:39,159 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 37 treesize of output 21 [2022-01-18 05:30:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:39,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:39,580 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:30:39,581 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 [2022-01-18 05:30:39,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:39,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:39,660 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 7 [2022-01-18 05:30:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:39,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600712217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:39,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:39,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:30:39,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663339052] [2022-01-18 05:30:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:39,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:30:39,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:30:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:30:39,722 INFO L87 Difference]: Start difference. First operand 8331 states and 36639 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:42,530 INFO L93 Difference]: Finished difference Result 10514 states and 45131 transitions. [2022-01-18 05:30:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:30:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:42,560 INFO L225 Difference]: With dead ends: 10514 [2022-01-18 05:30:42,560 INFO L226 Difference]: Without dead ends: 10463 [2022-01-18 05:30:42,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:30:42,560 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 555 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:42,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 1433 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:30:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2022-01-18 05:30:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8720. [2022-01-18 05:30:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 8719 states have (on average 4.40910654891616) internal successors, (38443), 8719 states have internal predecessors, (38443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 38443 transitions. [2022-01-18 05:30:42,751 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 38443 transitions. Word has length 33 [2022-01-18 05:30:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 38443 transitions. [2022-01-18 05:30:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 38443 transitions. [2022-01-18 05:30:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:42,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:42,768 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, 1, 1, 1] [2022-01-18 05:30:42,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 05:30:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 05:30:42,969 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1413929499, now seen corresponding path program 50 times [2022-01-18 05:30:42,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207467975] [2022-01-18 05:30:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:42,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:43,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207467975] [2022-01-18 05:30:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207467975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855709501] [2022-01-18 05:30:43,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:43,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:43,257 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) [2022-01-18 05:30:43,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 05:30:43,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:43,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:43,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:30:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:44,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:44,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:44,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:30:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:44,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:30:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855709501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:44,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:44,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:30:44,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061310967] [2022-01-18 05:30:44,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:44,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:30:44,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:30:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:30:44,455 INFO L87 Difference]: Start difference. First operand 8720 states and 38443 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:47,997 INFO L93 Difference]: Finished difference Result 10869 states and 46150 transitions. [2022-01-18 05:30:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:30:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:48,027 INFO L225 Difference]: With dead ends: 10869 [2022-01-18 05:30:48,027 INFO L226 Difference]: Without dead ends: 10839 [2022-01-18 05:30:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=572, Invalid=4258, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:30:48,028 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1075 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:48,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1284 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3926 Invalid, 0 Unknown, 418 Unchecked, 1.8s Time] [2022-01-18 05:30:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2022-01-18 05:30:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 8986. [2022-01-18 05:30:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 4.415358931552587) internal successors, (39672), 8985 states have internal predecessors, (39672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 39672 transitions. [2022-01-18 05:30:48,220 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 39672 transitions. Word has length 33 [2022-01-18 05:30:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:48,220 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 39672 transitions. [2022-01-18 05:30:48,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 39672 transitions. [2022-01-18 05:30:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:48,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:48,237 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, 1, 1, 1] [2022-01-18 05:30:48,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 05:30:48,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 05:30:48,438 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:48,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1951256657, now seen corresponding path program 51 times [2022-01-18 05:30:48,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:48,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962261438] [2022-01-18 05:30:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:48,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:48,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962261438] [2022-01-18 05:30:48,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962261438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598485814] [2022-01-18 05:30:48,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:48,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:48,697 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) [2022-01-18 05:30:48,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 05:30:48,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:30:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:30:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:49,027 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:30:49,028 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 31 treesize of output 57 [2022-01-18 05:30:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:49,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598485814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:49,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:49,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 05:30:49,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102884612] [2022-01-18 05:30:49,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:49,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:30:49,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:30:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:30:49,668 INFO L87 Difference]: Start difference. First operand 8986 states and 39672 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:53,443 INFO L93 Difference]: Finished difference Result 10851 states and 46437 transitions. [2022-01-18 05:30:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:30:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:53,474 INFO L225 Difference]: With dead ends: 10851 [2022-01-18 05:30:53,474 INFO L226 Difference]: Without dead ends: 10821 [2022-01-18 05:30:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:30:53,475 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1094 mSDsluCounter, 3612 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:53,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1359 Invalid, 5013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:30:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2022-01-18 05:30:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 9150. [2022-01-18 05:30:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 05:30:53,669 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 05:30:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:53,669 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 05:30:53,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 05:30:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:53,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:53,687 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, 1, 1, 1] [2022-01-18 05:30:53,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 05:30:53,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:53,887 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 648899597, now seen corresponding path program 52 times [2022-01-18 05:30:53,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:53,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151194378] [2022-01-18 05:30:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:53,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:54,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151194378] [2022-01-18 05:30:54,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151194378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399265771] [2022-01-18 05:30:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:54,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:54,141 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) [2022-01-18 05:30:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 05:30:54,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:54,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:30:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:54,482 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 35 treesize of output 19 [2022-01-18 05:30:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:54,949 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:30:54,950 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 [2022-01-18 05:30:55,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:55,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:55,012 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 7 [2022-01-18 05:30:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399265771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:55,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:55,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:30:55,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938612553] [2022-01-18 05:30:55,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:55,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:30:55,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:30:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:30:55,061 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:59,354 INFO L93 Difference]: Finished difference Result 11007 states and 47193 transitions. [2022-01-18 05:30:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:30:59,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:30:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:59,385 INFO L225 Difference]: With dead ends: 11007 [2022-01-18 05:30:59,385 INFO L226 Difference]: Without dead ends: 10992 [2022-01-18 05:30:59,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=534, Invalid=5016, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:30:59,386 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 731 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 4930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:59,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1480 Invalid, 4930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:30:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2022-01-18 05:30:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9150. [2022-01-18 05:30:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 05:30:59,582 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 05:30:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:59,582 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 05:30:59,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 05:30:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:30:59,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:59,600 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, 1, 1, 1] [2022-01-18 05:30:59,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 05:30:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:59,800 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:30:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1561474901, now seen corresponding path program 53 times [2022-01-18 05:30:59,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:59,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740581320] [2022-01-18 05:30:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:59,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:00,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740581320] [2022-01-18 05:31:00,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740581320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736769821] [2022-01-18 05:31:00,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:00,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:00,096 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) [2022-01-18 05:31:00,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 05:31:00,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:31:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:00,480 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 35 treesize of output 19 [2022-01-18 05:31:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:00,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:00,915 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:31:00,916 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 [2022-01-18 05:31:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:00,968 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 7 [2022-01-18 05:31:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:01,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736769821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:01,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:01,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:31:01,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250683301] [2022-01-18 05:31:01,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:01,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:31:01,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:31:01,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:31:01,018 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:05,430 INFO L93 Difference]: Finished difference Result 11316 states and 48188 transitions. [2022-01-18 05:31:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 05:31:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:05,461 INFO L225 Difference]: With dead ends: 11316 [2022-01-18 05:31:05,461 INFO L226 Difference]: Without dead ends: 11292 [2022-01-18 05:31:05,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=569, Invalid=4981, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:31:05,462 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 773 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:05,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1699 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:31:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2022-01-18 05:31:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 9150. [2022-01-18 05:31:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 05:31:05,665 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 05:31:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:05,665 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 05:31:05,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 05:31:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:05,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:05,683 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, 1, 1, 1] [2022-01-18 05:31:05,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 05:31:05,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:05,884 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -399872805, now seen corresponding path program 54 times [2022-01-18 05:31:05,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921995622] [2022-01-18 05:31:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:05,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:06,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921995622] [2022-01-18 05:31:06,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921995622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939917918] [2022-01-18 05:31:06,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:06,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:06,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:06,114 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) [2022-01-18 05:31:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 05:31:06,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:31:06,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:06,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:06,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:31:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:07,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:07,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:07,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:31:07,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:07,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:31:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939917918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:07,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:31:07,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684277429] [2022-01-18 05:31:07,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:07,612 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:10,050 INFO L93 Difference]: Finished difference Result 10442 states and 45297 transitions. [2022-01-18 05:31:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:31:10,051 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:10,080 INFO L225 Difference]: With dead ends: 10442 [2022-01-18 05:31:10,080 INFO L226 Difference]: Without dead ends: 10412 [2022-01-18 05:31:10,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=3547, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:31:10,080 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 734 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:10,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1066 Invalid, 3604 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 2827 Invalid, 0 Unknown, 664 Unchecked, 1.2s Time] [2022-01-18 05:31:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-01-18 05:31:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 9389. [2022-01-18 05:31:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9389 states, 9388 states have (on average 4.415636983383042) internal successors, (41454), 9388 states have internal predecessors, (41454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9389 states to 9389 states and 41454 transitions. [2022-01-18 05:31:10,265 INFO L78 Accepts]: Start accepts. Automaton has 9389 states and 41454 transitions. Word has length 33 [2022-01-18 05:31:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:10,265 INFO L470 AbstractCegarLoop]: Abstraction has 9389 states and 41454 transitions. [2022-01-18 05:31:10,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9389 states and 41454 transitions. [2022-01-18 05:31:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:10,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:10,283 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, 1, 1, 1] [2022-01-18 05:31:10,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:10,483 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 487630876, now seen corresponding path program 5 times [2022-01-18 05:31:10,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998935997] [2022-01-18 05:31:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:10,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:10,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998935997] [2022-01-18 05:31:10,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998935997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443538435] [2022-01-18 05:31:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:10,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:10,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:10,703 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) [2022-01-18 05:31:10,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 05:31:10,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:31:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:11,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:11,443 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:31:11,444 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 [2022-01-18 05:31:11,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:11,507 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 7 [2022-01-18 05:31:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:11,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443538435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:11,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:11,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:31:11,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565368637] [2022-01-18 05:31:11,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:11,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:11,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:11,556 INFO L87 Difference]: Start difference. First operand 9389 states and 41454 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:14,511 INFO L93 Difference]: Finished difference Result 11328 states and 48701 transitions. [2022-01-18 05:31:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:31:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:14,542 INFO L225 Difference]: With dead ends: 11328 [2022-01-18 05:31:14,543 INFO L226 Difference]: Without dead ends: 11198 [2022-01-18 05:31:14,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=641, Invalid=4615, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 05:31:14,543 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 696 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:14,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1146 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 05:31:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2022-01-18 05:31:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 9157. [2022-01-18 05:31:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 4.424639580602883) internal successors, (40512), 9156 states have internal predecessors, (40512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 40512 transitions. [2022-01-18 05:31:14,739 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 40512 transitions. Word has length 33 [2022-01-18 05:31:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:14,740 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 40512 transitions. [2022-01-18 05:31:14,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 40512 transitions. [2022-01-18 05:31:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:14,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:14,757 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, 1, 1, 1] [2022-01-18 05:31:14,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:14,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:14,958 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 119359515, now seen corresponding path program 55 times [2022-01-18 05:31:14,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:14,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197133655] [2022-01-18 05:31:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:14,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:15,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:15,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197133655] [2022-01-18 05:31:15,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197133655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:15,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598309069] [2022-01-18 05:31:15,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:31:15,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:15,189 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) [2022-01-18 05:31:15,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 05:31:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:15,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:15,513 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 37 treesize of output 21 [2022-01-18 05:31:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:15,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:15,947 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:31:15,948 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 [2022-01-18 05:31:16,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,011 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 27 treesize of output 7 [2022-01-18 05:31:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:16,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598309069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:16,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:16,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:31:16,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067528056] [2022-01-18 05:31:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:16,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:16,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:16,061 INFO L87 Difference]: Start difference. First operand 9157 states and 40512 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:19,349 INFO L93 Difference]: Finished difference Result 10339 states and 45035 transitions. [2022-01-18 05:31:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:31:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:19,377 INFO L225 Difference]: With dead ends: 10339 [2022-01-18 05:31:19,377 INFO L226 Difference]: Without dead ends: 10261 [2022-01-18 05:31:19,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=473, Invalid=4497, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:31:19,378 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 541 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:19,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1396 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:31:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-01-18 05:31:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9142. [2022-01-18 05:31:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 4.4254457936768405) internal successors, (40453), 9141 states have internal predecessors, (40453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 40453 transitions. [2022-01-18 05:31:19,547 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 40453 transitions. Word has length 33 [2022-01-18 05:31:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 9142 states and 40453 transitions. [2022-01-18 05:31:19,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 40453 transitions. [2022-01-18 05:31:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:19,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:19,565 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, 1, 1, 1] [2022-01-18 05:31:19,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 05:31:19,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:19,766 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1984743527, now seen corresponding path program 56 times [2022-01-18 05:31:19,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:19,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954370688] [2022-01-18 05:31:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:19,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:19,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954370688] [2022-01-18 05:31:19,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954370688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254442747] [2022-01-18 05:31:19,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:19,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:19,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:19,966 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) [2022-01-18 05:31:19,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 05:31:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:20,437 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:31:20,438 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 36 treesize of output 60 [2022-01-18 05:31:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254442747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:20,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:20,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:31:20,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978657672] [2022-01-18 05:31:20,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:31:20,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:31:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:31:20,991 INFO L87 Difference]: Start difference. First operand 9142 states and 40453 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:24,590 INFO L93 Difference]: Finished difference Result 11651 states and 50339 transitions. [2022-01-18 05:31:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:31:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:24,689 INFO L225 Difference]: With dead ends: 11651 [2022-01-18 05:31:24,690 INFO L226 Difference]: Without dead ends: 11586 [2022-01-18 05:31:24,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=573, Invalid=5907, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:31:24,690 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 983 mSDsluCounter, 3217 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:24,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1302 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:31:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-01-18 05:31:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 9220. [2022-01-18 05:31:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9220 states, 9219 states have (on average 4.428354485302093) internal successors, (40825), 9219 states have internal predecessors, (40825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9220 states to 9220 states and 40825 transitions. [2022-01-18 05:31:24,876 INFO L78 Accepts]: Start accepts. Automaton has 9220 states and 40825 transitions. Word has length 33 [2022-01-18 05:31:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:24,876 INFO L470 AbstractCegarLoop]: Abstraction has 9220 states and 40825 transitions. [2022-01-18 05:31:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states and 40825 transitions. [2022-01-18 05:31:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:24,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:24,894 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, 1, 1, 1] [2022-01-18 05:31:24,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 05:31:25,094 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,SelfDestructingSolverStorable155 [2022-01-18 05:31:25,094 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash 51101753, now seen corresponding path program 57 times [2022-01-18 05:31:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:25,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770490567] [2022-01-18 05:31:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:25,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:25,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770490567] [2022-01-18 05:31:25,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770490567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349955425] [2022-01-18 05:31:25,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:25,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:25,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:25,273 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) [2022-01-18 05:31:25,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 05:31:25,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:25,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:25,628 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:31:25,628 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 33 treesize of output 59 [2022-01-18 05:31:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:25,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:26,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349955425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:26,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:26,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:31:26,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954738187] [2022-01-18 05:31:26,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:26,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:26,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:26,188 INFO L87 Difference]: Start difference. First operand 9220 states and 40825 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:30,925 INFO L93 Difference]: Finished difference Result 13656 states and 58400 transitions. [2022-01-18 05:31:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 05:31:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:30,964 INFO L225 Difference]: With dead ends: 13656 [2022-01-18 05:31:30,965 INFO L226 Difference]: Without dead ends: 13606 [2022-01-18 05:31:30,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=873, Invalid=8057, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:31:30,965 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1391 mSDsluCounter, 4263 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 5963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:30,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1693 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 05:31:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2022-01-18 05:31:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 9526. [2022-01-18 05:31:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 4.4503937007874015) internal successors, (42390), 9525 states have internal predecessors, (42390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 42390 transitions. [2022-01-18 05:31:31,190 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 42390 transitions. Word has length 33 [2022-01-18 05:31:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 9526 states and 42390 transitions. [2022-01-18 05:31:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 42390 transitions. [2022-01-18 05:31:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:31,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:31,209 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, 1, 1, 1] [2022-01-18 05:31:31,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 05:31:31,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 05:31:31,409 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1354374359, now seen corresponding path program 58 times [2022-01-18 05:31:31,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:31,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847822472] [2022-01-18 05:31:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:31,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:31,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:31,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847822472] [2022-01-18 05:31:31,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847822472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:31,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214368524] [2022-01-18 05:31:31,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:31:31,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:31,628 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) [2022-01-18 05:31:31,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 05:31:31,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:31:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:32,053 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 37 treesize of output 21 [2022-01-18 05:31:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:32,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:32,446 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:31:32,447 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 27 treesize of output 48 [2022-01-18 05:31:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:32,510 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 7 [2022-01-18 05:31:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214368524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:32,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:32,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:31:32,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975255355] [2022-01-18 05:31:32,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:32,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:31:32,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:31:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:31:32,563 INFO L87 Difference]: Start difference. First operand 9526 states and 42390 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:34,460 INFO L93 Difference]: Finished difference Result 11176 states and 48742 transitions. [2022-01-18 05:31:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:31:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:34,492 INFO L225 Difference]: With dead ends: 11176 [2022-01-18 05:31:34,492 INFO L226 Difference]: Without dead ends: 11140 [2022-01-18 05:31:34,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:31:34,493 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 648 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 3238 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:34,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 922 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:31:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-01-18 05:31:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9777. [2022-01-18 05:31:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 4.457037643207856) internal successors, (43572), 9776 states have internal predecessors, (43572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 43572 transitions. [2022-01-18 05:31:34,752 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 43572 transitions. Word has length 33 [2022-01-18 05:31:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:34,752 INFO L470 AbstractCegarLoop]: Abstraction has 9777 states and 43572 transitions. [2022-01-18 05:31:34,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 43572 transitions. [2022-01-18 05:31:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:34,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:34,771 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, 1, 1, 1] [2022-01-18 05:31:34,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 05:31:34,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 05:31:34,972 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1300987839, now seen corresponding path program 59 times [2022-01-18 05:31:34,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742226787] [2022-01-18 05:31:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:34,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:35,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:35,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742226787] [2022-01-18 05:31:35,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742226787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:35,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897597744] [2022-01-18 05:31:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:35,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:35,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:35,208 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) [2022-01-18 05:31:35,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 05:31:35,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:31:35,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 05:31:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:35,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:35,585 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 35 treesize of output 21 [2022-01-18 05:31:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:35,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:36,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 48 [2022-01-18 05:31:36,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:31:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:36,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897597744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:36,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:36,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 05:31:36,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862202907] [2022-01-18 05:31:36,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:31:36,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:31:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:31:36,219 INFO L87 Difference]: Start difference. First operand 9777 states and 43572 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:44,219 INFO L93 Difference]: Finished difference Result 13528 states and 57066 transitions. [2022-01-18 05:31:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 05:31:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:44,257 INFO L225 Difference]: With dead ends: 13528 [2022-01-18 05:31:44,257 INFO L226 Difference]: Without dead ends: 13439 [2022-01-18 05:31:44,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1813, Invalid=12229, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 05:31:44,258 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1737 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 6511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 6214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:44,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1787 Invalid, 6511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 6214 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-18 05:31:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2022-01-18 05:31:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 9963. [2022-01-18 05:31:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 4.463260389480024) internal successors, (44463), 9962 states have internal predecessors, (44463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44463 transitions. [2022-01-18 05:31:44,481 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44463 transitions. Word has length 33 [2022-01-18 05:31:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:44,482 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 44463 transitions. [2022-01-18 05:31:44,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44463 transitions. [2022-01-18 05:31:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:44,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:44,500 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, 1, 1, 1] [2022-01-18 05:31:44,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:44,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:44,700 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 570334073, now seen corresponding path program 60 times [2022-01-18 05:31:44,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026042088] [2022-01-18 05:31:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:44,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:44,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026042088] [2022-01-18 05:31:44,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026042088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188706307] [2022-01-18 05:31:44,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:44,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:44,885 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) [2022-01-18 05:31:44,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 05:31:44,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:31:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:45,249 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:31:45,249 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 59 [2022-01-18 05:31:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:45,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188706307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:45,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:45,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 05:31:45,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952018517] [2022-01-18 05:31:45,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:45,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:45,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:45,903 INFO L87 Difference]: Start difference. First operand 9963 states and 44463 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:51,016 INFO L93 Difference]: Finished difference Result 14892 states and 64988 transitions. [2022-01-18 05:31:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 05:31:51,016 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:51,060 INFO L225 Difference]: With dead ends: 14892 [2022-01-18 05:31:51,060 INFO L226 Difference]: Without dead ends: 14824 [2022-01-18 05:31:51,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=804, Invalid=8126, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:31:51,061 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1077 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 6287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:51,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 1873 Invalid, 6287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 05:31:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-01-18 05:31:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 11016. [2022-01-18 05:31:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-01-18 05:31:51,390 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-01-18 05:31:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:51,390 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-01-18 05:31:51,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-01-18 05:31:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:51,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:51,411 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, 1, 1, 1] [2022-01-18 05:31:51,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:51,612 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash 326417503, now seen corresponding path program 61 times [2022-01-18 05:31:51,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007258232] [2022-01-18 05:31:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:51,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007258232] [2022-01-18 05:31:51,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007258232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323715129] [2022-01-18 05:31:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:31:51,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:51,828 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) [2022-01-18 05:31:51,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 05:31:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:52,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:52,309 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 37 treesize of output 21 [2022-01-18 05:31:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:52,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:52,712 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:31:52,712 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 27 treesize of output 48 [2022-01-18 05:31:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:52,775 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 7 [2022-01-18 05:31:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:52,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323715129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:52,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:31:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518592078] [2022-01-18 05:31:52,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:31:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:31:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:31:52,824 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:54,947 INFO L93 Difference]: Finished difference Result 12046 states and 53910 transitions. [2022-01-18 05:31:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:31:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:31:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:54,982 INFO L225 Difference]: With dead ends: 12046 [2022-01-18 05:31:54,982 INFO L226 Difference]: Without dead ends: 11981 [2022-01-18 05:31:54,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:31:54,982 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 433 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:54,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1070 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 05:31:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2022-01-18 05:31:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 11016. [2022-01-18 05:31:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-01-18 05:31:55,213 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-01-18 05:31:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:55,213 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-01-18 05:31:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-01-18 05:31:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:55,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:55,284 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, 1, 1, 1] [2022-01-18 05:31:55,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 05:31:55,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:55,485 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1256626191, now seen corresponding path program 62 times [2022-01-18 05:31:55,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074142705] [2022-01-18 05:31:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:55,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074142705] [2022-01-18 05:31:55,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074142705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363404632] [2022-01-18 05:31:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:55,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:55,666 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) [2022-01-18 05:31:55,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 05:31:55,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:56,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:56,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:31:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:56,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:56,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:56,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:31:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:56,752 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:31:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363404632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:56,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:56,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 05:31:56,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768132180] [2022-01-18 05:31:56,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:56,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:31:56,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:31:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:31:56,801 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) 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) [2022-01-18 05:31:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:59,075 INFO L93 Difference]: Finished difference Result 12337 states and 55335 transitions. [2022-01-18 05:31:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:31:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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 33 [2022-01-18 05:31:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:59,112 INFO L225 Difference]: With dead ends: 12337 [2022-01-18 05:31:59,112 INFO L226 Difference]: Without dead ends: 12319 [2022-01-18 05:31:59,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=307, Invalid=2555, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:31:59,112 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 486 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:59,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 999 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3141 Invalid, 0 Unknown, 212 Unchecked, 1.3s Time] [2022-01-18 05:31:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2022-01-18 05:31:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 11064. [2022-01-18 05:31:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 4.544969718882762) internal successors, (50281), 11063 states have internal predecessors, (50281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 50281 transitions. [2022-01-18 05:31:59,335 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 50281 transitions. Word has length 33 [2022-01-18 05:31:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:59,336 INFO L470 AbstractCegarLoop]: Abstraction has 11064 states and 50281 transitions. [2022-01-18 05:31:59,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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) [2022-01-18 05:31:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 50281 transitions. [2022-01-18 05:31:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:31:59,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:59,357 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, 1, 1, 1] [2022-01-18 05:31:59,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:59,557 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,SelfDestructingSolverStorable161 [2022-01-18 05:31:59,557 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:31:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1806628815, now seen corresponding path program 63 times [2022-01-18 05:31:59,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:59,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943497797] [2022-01-18 05:31:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:59,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:59,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943497797] [2022-01-18 05:31:59,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943497797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335248989] [2022-01-18 05:31:59,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:59,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:59,739 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) [2022-01-18 05:31:59,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 05:31:59,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:31:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:00,222 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:32:00,222 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 59 [2022-01-18 05:32:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:00,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:00,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335248989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:00,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:00,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-01-18 05:32:00,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522338076] [2022-01-18 05:32:00,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:00,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:32:00,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:32:00,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:32:00,757 INFO L87 Difference]: Start difference. First operand 11064 states and 50281 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:04,655 INFO L93 Difference]: Finished difference Result 13285 states and 58444 transitions. [2022-01-18 05:32:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:32:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:04,695 INFO L225 Difference]: With dead ends: 13285 [2022-01-18 05:32:04,695 INFO L226 Difference]: Without dead ends: 13211 [2022-01-18 05:32:04,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 05:32:04,696 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 850 mSDsluCounter, 4043 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:04,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1669 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:32:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13211 states. [2022-01-18 05:32:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13211 to 11058. [2022-01-18 05:32:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 4.553585963642941) internal successors, (50349), 11057 states have internal predecessors, (50349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50349 transitions. [2022-01-18 05:32:04,947 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50349 transitions. Word has length 33 [2022-01-18 05:32:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:04,947 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 50349 transitions. [2022-01-18 05:32:04,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50349 transitions. [2022-01-18 05:32:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:05,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:05,022 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, 1, 1, 1] [2022-01-18 05:32:05,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:05,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:05,222 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1813873799, now seen corresponding path program 64 times [2022-01-18 05:32:05,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:05,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945168617] [2022-01-18 05:32:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:05,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:05,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:05,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945168617] [2022-01-18 05:32:05,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945168617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:05,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584182178] [2022-01-18 05:32:05,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:32:05,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:05,423 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) [2022-01-18 05:32:05,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 05:32:05,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:32:05,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:05,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:05,913 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 37 treesize of output 21 [2022-01-18 05:32:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:05,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:06,369 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:06,369 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 [2022-01-18 05:32:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:06,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:06,434 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 27 treesize of output 7 [2022-01-18 05:32:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:06,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584182178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:06,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:06,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:32:06,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943621180] [2022-01-18 05:32:06,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:06,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:32:06,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:32:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:32:06,483 INFO L87 Difference]: Start difference. First operand 11058 states and 50349 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:08,045 INFO L93 Difference]: Finished difference Result 11637 states and 52576 transitions. [2022-01-18 05:32:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:32:08,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:08,080 INFO L225 Difference]: With dead ends: 11637 [2022-01-18 05:32:08,080 INFO L226 Difference]: Without dead ends: 11626 [2022-01-18 05:32:08,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:32:08,080 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 326 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:08,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 863 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2684 Invalid, 0 Unknown, 25 Unchecked, 1.0s Time] [2022-01-18 05:32:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2022-01-18 05:32:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 11149. [2022-01-18 05:32:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 4.540545389307499) internal successors, (50618), 11148 states have internal predecessors, (50618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 50618 transitions. [2022-01-18 05:32:08,303 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 50618 transitions. Word has length 33 [2022-01-18 05:32:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:08,303 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 50618 transitions. [2022-01-18 05:32:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 50618 transitions. [2022-01-18 05:32:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:08,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:08,324 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, 1, 1, 1] [2022-01-18 05:32:08,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:08,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:08,525 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash -926370118, now seen corresponding path program 6 times [2022-01-18 05:32:08,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:08,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343928519] [2022-01-18 05:32:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:08,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:08,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343928519] [2022-01-18 05:32:08,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343928519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262286089] [2022-01-18 05:32:08,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:08,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:08,705 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) [2022-01-18 05:32:08,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 05:32:08,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:32:08,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:09,201 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:32:09,201 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 31 treesize of output 57 [2022-01-18 05:32:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:09,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:09,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262286089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:09,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:09,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 05:32:09,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625092553] [2022-01-18 05:32:09,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:09,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:32:09,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:32:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:32:09,808 INFO L87 Difference]: Start difference. First operand 11149 states and 50618 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:14,897 INFO L93 Difference]: Finished difference Result 14471 states and 63309 transitions. [2022-01-18 05:32:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 05:32:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:14,941 INFO L225 Difference]: With dead ends: 14471 [2022-01-18 05:32:14,942 INFO L226 Difference]: Without dead ends: 14376 [2022-01-18 05:32:14,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=755, Invalid=8557, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 05:32:14,943 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1022 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 5062 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 5062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:14,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1473 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 5062 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:32:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14376 states. [2022-01-18 05:32:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14376 to 11127. [2022-01-18 05:32:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 11126 states have (on average 4.554287255078195) internal successors, (50671), 11126 states have internal predecessors, (50671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 50671 transitions. [2022-01-18 05:32:15,322 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 50671 transitions. Word has length 33 [2022-01-18 05:32:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:15,322 INFO L470 AbstractCegarLoop]: Abstraction has 11127 states and 50671 transitions. [2022-01-18 05:32:15,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 50671 transitions. [2022-01-18 05:32:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:15,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:15,346 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, 1, 1, 1] [2022-01-18 05:32:15,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 05:32:15,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:15,547 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 446804635, now seen corresponding path program 65 times [2022-01-18 05:32:15,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:15,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642920662] [2022-01-18 05:32:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:15,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:15,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:15,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642920662] [2022-01-18 05:32:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642920662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:15,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899038558] [2022-01-18 05:32:15,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:32:15,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:15,727 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) [2022-01-18 05:32:15,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 05:32:15,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:32:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:15,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:16,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:16,546 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:16,546 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 [2022-01-18 05:32:16,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:16,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:16,608 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 7 [2022-01-18 05:32:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:16,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899038558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:16,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:16,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:32:16,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359253953] [2022-01-18 05:32:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:16,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:32:16,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:32:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:32:16,656 INFO L87 Difference]: Start difference. First operand 11127 states and 50671 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:19,048 INFO L93 Difference]: Finished difference Result 12144 states and 54457 transitions. [2022-01-18 05:32:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:32:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:19,083 INFO L225 Difference]: With dead ends: 12144 [2022-01-18 05:32:19,083 INFO L226 Difference]: Without dead ends: 12133 [2022-01-18 05:32:19,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:32:19,084 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 401 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:19,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1373 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4260 Invalid, 0 Unknown, 240 Unchecked, 1.6s Time] [2022-01-18 05:32:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12133 states. [2022-01-18 05:32:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12133 to 11201. [2022-01-18 05:32:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11201 states, 11200 states have (on average 4.5441071428571425) internal successors, (50894), 11200 states have internal predecessors, (50894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 50894 transitions. [2022-01-18 05:32:19,322 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 50894 transitions. Word has length 33 [2022-01-18 05:32:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:19,322 INFO L470 AbstractCegarLoop]: Abstraction has 11201 states and 50894 transitions. [2022-01-18 05:32:19,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 50894 transitions. [2022-01-18 05:32:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:19,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:19,344 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, 1, 1, 1] [2022-01-18 05:32:19,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:19,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:19,544 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1671487815, now seen corresponding path program 66 times [2022-01-18 05:32:19,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567319143] [2022-01-18 05:32:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:19,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:19,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567319143] [2022-01-18 05:32:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567319143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415951998] [2022-01-18 05:32:19,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:19,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:19,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:19,772 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) [2022-01-18 05:32:19,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 05:32:19,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:32:19,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:19,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:20,404 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:32:20,404 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 33 treesize of output 59 [2022-01-18 05:32:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:20,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415951998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:21,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:21,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:32:21,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454145851] [2022-01-18 05:32:21,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:32:21,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:32:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:32:21,016 INFO L87 Difference]: Start difference. First operand 11201 states and 50894 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:25,518 INFO L93 Difference]: Finished difference Result 13953 states and 60809 transitions. [2022-01-18 05:32:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 05:32:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:25,559 INFO L225 Difference]: With dead ends: 13953 [2022-01-18 05:32:25,559 INFO L226 Difference]: Without dead ends: 13892 [2022-01-18 05:32:25,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=675, Invalid=7157, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 05:32:25,561 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1012 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 4531 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 4727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:25,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1388 Invalid, 4727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4531 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:32:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2022-01-18 05:32:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 11145. [2022-01-18 05:32:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11144 states have (on average 4.552045944005743) internal successors, (50728), 11144 states have internal predecessors, (50728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 50728 transitions. [2022-01-18 05:32:25,918 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 50728 transitions. Word has length 33 [2022-01-18 05:32:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:25,918 INFO L470 AbstractCegarLoop]: Abstraction has 11145 states and 50728 transitions. [2022-01-18 05:32:25,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 50728 transitions. [2022-01-18 05:32:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:25,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:25,943 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, 1, 1, 1] [2022-01-18 05:32:25,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 05:32:26,143 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,SelfDestructingSolverStorable166 [2022-01-18 05:32:26,144 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -523288529, now seen corresponding path program 67 times [2022-01-18 05:32:26,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409219260] [2022-01-18 05:32:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:26,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:26,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409219260] [2022-01-18 05:32:26,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409219260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664686879] [2022-01-18 05:32:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:26,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:26,364 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) [2022-01-18 05:32:26,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 05:32:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:26,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:26,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:27,157 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:27,157 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 [2022-01-18 05:32:27,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:27,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:27,221 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 7 [2022-01-18 05:32:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:27,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664686879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:27,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:27,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:32:27,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623665531] [2022-01-18 05:32:27,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:27,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:32:27,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:32:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:32:27,272 INFO L87 Difference]: Start difference. First operand 11145 states and 50728 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:30,010 INFO L93 Difference]: Finished difference Result 14490 states and 64069 transitions. [2022-01-18 05:32:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:32:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:30,053 INFO L225 Difference]: With dead ends: 14490 [2022-01-18 05:32:30,053 INFO L226 Difference]: Without dead ends: 14399 [2022-01-18 05:32:30,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=517, Invalid=4313, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:32:30,054 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 701 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 4371 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 5277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:30,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1604 Invalid, 5277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4371 Invalid, 0 Unknown, 793 Unchecked, 1.8s Time] [2022-01-18 05:32:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14399 states. [2022-01-18 05:32:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14399 to 11502. [2022-01-18 05:32:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11502 states, 11501 states have (on average 4.563777062864099) internal successors, (52488), 11501 states have internal predecessors, (52488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11502 states to 11502 states and 52488 transitions. [2022-01-18 05:32:30,324 INFO L78 Accepts]: Start accepts. Automaton has 11502 states and 52488 transitions. Word has length 33 [2022-01-18 05:32:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 11502 states and 52488 transitions. [2022-01-18 05:32:30,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11502 states and 52488 transitions. [2022-01-18 05:32:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:30,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:30,349 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, 1, 1, 1] [2022-01-18 05:32:30,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 05:32:30,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:30,550 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash 779984077, now seen corresponding path program 68 times [2022-01-18 05:32:30,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696995847] [2022-01-18 05:32:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:30,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:30,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696995847] [2022-01-18 05:32:30,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696995847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100810796] [2022-01-18 05:32:30,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:32:30,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:30,767 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) [2022-01-18 05:32:30,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 05:32:30,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:32:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:31,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:31,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 05:32:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:31,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:31,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:31,947 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 17 treesize of output 22 [2022-01-18 05:32:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:31,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:32:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100810796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:32,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:32,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-01-18 05:32:32,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695895785] [2022-01-18 05:32:32,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:32,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:32:32,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:32:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=704, Unknown=1, NotChecked=0, Total=812 [2022-01-18 05:32:32,006 INFO L87 Difference]: Start difference. First operand 11502 states and 52488 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2022-01-18 05:32:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:33,662 INFO L93 Difference]: Finished difference Result 12534 states and 56539 transitions. [2022-01-18 05:32:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:32:33,662 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 33 [2022-01-18 05:32:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:33,697 INFO L225 Difference]: With dead ends: 12534 [2022-01-18 05:32:33,698 INFO L226 Difference]: Without dead ends: 12523 [2022-01-18 05:32:33,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1807, Unknown=1, NotChecked=0, Total=2070 [2022-01-18 05:32:33,698 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 519 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:33,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1065 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2807 Invalid, 0 Unknown, 701 Unchecked, 1.1s Time] [2022-01-18 05:32:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12523 states. [2022-01-18 05:32:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12523 to 11538. [2022-01-18 05:32:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11538 states, 11537 states have (on average 4.5602843026783395) internal successors, (52612), 11537 states have internal predecessors, (52612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 52612 transitions. [2022-01-18 05:32:33,935 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 52612 transitions. Word has length 33 [2022-01-18 05:32:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:33,935 INFO L470 AbstractCegarLoop]: Abstraction has 11538 states and 52612 transitions. [2022-01-18 05:32:33,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2022-01-18 05:32:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 52612 transitions. [2022-01-18 05:32:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:33,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:33,957 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, 1, 1, 1] [2022-01-18 05:32:33,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 05:32:34,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 05:32:34,158 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash 583470572, now seen corresponding path program 7 times [2022-01-18 05:32:34,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253956609] [2022-01-18 05:32:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:34,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:34,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253956609] [2022-01-18 05:32:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253956609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362427706] [2022-01-18 05:32:34,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:34,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:34,348 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) [2022-01-18 05:32:34,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 05:32:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:34,715 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 33 treesize of output 17 [2022-01-18 05:32:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:34,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:35,089 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:35,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:32:35,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:35,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:35,152 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 7 [2022-01-18 05:32:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:35,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362427706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:35,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:35,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 05:32:35,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965086512] [2022-01-18 05:32:35,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:35,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:32:35,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:32:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:32:35,203 INFO L87 Difference]: Start difference. First operand 11538 states and 52612 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:37,815 INFO L93 Difference]: Finished difference Result 14425 states and 63648 transitions. [2022-01-18 05:32:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 05:32:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:37,857 INFO L225 Difference]: With dead ends: 14425 [2022-01-18 05:32:37,857 INFO L226 Difference]: Without dead ends: 14274 [2022-01-18 05:32:37,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:32:37,858 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 756 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:37,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1349 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:32:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-01-18 05:32:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 11508. [2022-01-18 05:32:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 4.561745024767533) internal successors, (52492), 11507 states have internal predecessors, (52492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 52492 transitions. [2022-01-18 05:32:38,128 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 52492 transitions. Word has length 33 [2022-01-18 05:32:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:38,128 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 52492 transitions. [2022-01-18 05:32:38,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 52492 transitions. [2022-01-18 05:32:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:38,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:38,150 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, 1, 1, 1] [2022-01-18 05:32:38,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 05:32:38,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 05:32:38,351 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1505540643, now seen corresponding path program 69 times [2022-01-18 05:32:38,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:38,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424317815] [2022-01-18 05:32:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:38,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:38,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424317815] [2022-01-18 05:32:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424317815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017699728] [2022-01-18 05:32:38,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:32:38,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:38,531 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) [2022-01-18 05:32:38,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 05:32:38,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:32:38,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:32:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:38,887 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:32:38,888 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 31 treesize of output 55 [2022-01-18 05:32:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:39,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:39,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017699728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:39,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:39,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:32:39,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741773425] [2022-01-18 05:32:39,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:39,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:32:39,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:32:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:32:39,430 INFO L87 Difference]: Start difference. First operand 11508 states and 52492 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:44,444 INFO L93 Difference]: Finished difference Result 15526 states and 68442 transitions. [2022-01-18 05:32:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 05:32:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:44,492 INFO L225 Difference]: With dead ends: 15526 [2022-01-18 05:32:44,493 INFO L226 Difference]: Without dead ends: 15462 [2022-01-18 05:32:44,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=809, Invalid=9091, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 05:32:44,494 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1141 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 6419 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 6419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:44,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2129 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 6419 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 05:32:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15462 states. [2022-01-18 05:32:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15462 to 11922. [2022-01-18 05:32:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11922 states, 11921 states have (on average 4.589212314403154) internal successors, (54708), 11921 states have internal predecessors, (54708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11922 states to 11922 states and 54708 transitions. [2022-01-18 05:32:44,771 INFO L78 Accepts]: Start accepts. Automaton has 11922 states and 54708 transitions. Word has length 33 [2022-01-18 05:32:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:44,771 INFO L470 AbstractCegarLoop]: Abstraction has 11922 states and 54708 transitions. [2022-01-18 05:32:44,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11922 states and 54708 transitions. [2022-01-18 05:32:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:44,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:44,794 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, 1, 1, 1] [2022-01-18 05:32:44,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 05:32:44,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:44,995 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash 569915123, now seen corresponding path program 70 times [2022-01-18 05:32:44,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071195507] [2022-01-18 05:32:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:44,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:45,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071195507] [2022-01-18 05:32:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071195507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426905260] [2022-01-18 05:32:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:32:45,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:45,194 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) [2022-01-18 05:32:45,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 05:32:45,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:32:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:45,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:45,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:46,027 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:46,027 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 [2022-01-18 05:32:46,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:46,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:46,093 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 27 treesize of output 7 [2022-01-18 05:32:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426905260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:46,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:32:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300082614] [2022-01-18 05:32:46,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:46,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:32:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:32:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:32:46,141 INFO L87 Difference]: Start difference. First operand 11922 states and 54708 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:48,777 INFO L93 Difference]: Finished difference Result 13028 states and 59162 transitions. [2022-01-18 05:32:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:32:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:48,820 INFO L225 Difference]: With dead ends: 13028 [2022-01-18 05:32:48,820 INFO L226 Difference]: Without dead ends: 12998 [2022-01-18 05:32:48,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:32:48,821 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 4348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:48,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1356 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4281 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:32:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12998 states. [2022-01-18 05:32:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12998 to 11924. [2022-01-18 05:32:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11924 states, 11923 states have (on average 4.589197349660321) internal successors, (54717), 11923 states have internal predecessors, (54717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 54717 transitions. [2022-01-18 05:32:49,132 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 54717 transitions. Word has length 33 [2022-01-18 05:32:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:49,132 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 54717 transitions. [2022-01-18 05:32:49,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 54717 transitions. [2022-01-18 05:32:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:49,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:49,155 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, 1, 1, 1] [2022-01-18 05:32:49,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 05:32:49,355 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,SelfDestructingSolverStorable171 [2022-01-18 05:32:49,356 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1003944469, now seen corresponding path program 71 times [2022-01-18 05:32:49,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252609986] [2022-01-18 05:32:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:49,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:49,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252609986] [2022-01-18 05:32:49,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252609986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547757503] [2022-01-18 05:32:49,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:32:49,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:49,571 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) [2022-01-18 05:32:49,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 05:32:49,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:32:49,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:49,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:49,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:50,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:50,404 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:32:50,404 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 [2022-01-18 05:32:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:50,453 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 7 [2022-01-18 05:32:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547757503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:50,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:32:50,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183389310] [2022-01-18 05:32:50,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:32:50,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:32:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:32:50,502 INFO L87 Difference]: Start difference. First operand 11924 states and 54717 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:53,775 INFO L93 Difference]: Finished difference Result 14210 states and 63649 transitions. [2022-01-18 05:32:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:32:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:53,817 INFO L225 Difference]: With dead ends: 14210 [2022-01-18 05:32:53,818 INFO L226 Difference]: Without dead ends: 14151 [2022-01-18 05:32:53,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:32:53,818 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 595 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 5535 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 5535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:53,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1726 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5535 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 05:32:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2022-01-18 05:32:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 11925. [2022-01-18 05:32:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 4.589483394833948) internal successors, (54725), 11924 states have internal predecessors, (54725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 54725 transitions. [2022-01-18 05:32:54,192 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 54725 transitions. Word has length 33 [2022-01-18 05:32:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:54,192 INFO L470 AbstractCegarLoop]: Abstraction has 11925 states and 54725 transitions. [2022-01-18 05:32:54,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 54725 transitions. [2022-01-18 05:32:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:32:54,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:54,215 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, 1, 1, 1] [2022-01-18 05:32:54,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:54,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:54,416 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:32:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1425999091, now seen corresponding path program 72 times [2022-01-18 05:32:54,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626206620] [2022-01-18 05:32:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:54,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:54,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626206620] [2022-01-18 05:32:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626206620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691953427] [2022-01-18 05:32:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:54,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:54,651 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) [2022-01-18 05:32:54,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 05:32:54,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:32:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:32:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:55,034 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:32:55,034 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 31 treesize of output 55 [2022-01-18 05:32:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:55,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:55,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691953427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:55,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:55,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 05:32:55,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11818665] [2022-01-18 05:32:55,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:55,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:32:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:32:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:32:55,576 INFO L87 Difference]: Start difference. First operand 11925 states and 54725 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:59,957 INFO L93 Difference]: Finished difference Result 15371 states and 68303 transitions. [2022-01-18 05:32:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 05:32:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:32:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:00,004 INFO L225 Difference]: With dead ends: 15371 [2022-01-18 05:33:00,005 INFO L226 Difference]: Without dead ends: 15301 [2022-01-18 05:33:00,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=827, Invalid=6829, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 05:33:00,006 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1188 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:00,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1531 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:33:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-01-18 05:33:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 12325. [2022-01-18 05:33:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12325 states, 12324 states have (on average 4.600048685491723) internal successors, (56691), 12324 states have internal predecessors, (56691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 56691 transitions. [2022-01-18 05:33:00,380 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 56691 transitions. Word has length 33 [2022-01-18 05:33:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:00,380 INFO L470 AbstractCegarLoop]: Abstraction has 12325 states and 56691 transitions. [2022-01-18 05:33:00,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 56691 transitions. [2022-01-18 05:33:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:00,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:00,406 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, 1, 1, 1] [2022-01-18 05:33:00,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 05:33:00,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:00,607 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1565695599, now seen corresponding path program 73 times [2022-01-18 05:33:00,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:00,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097738577] [2022-01-18 05:33:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:00,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:00,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097738577] [2022-01-18 05:33:00,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097738577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877723498] [2022-01-18 05:33:00,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:00,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:00,782 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) [2022-01-18 05:33:00,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 05:33:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:00,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,092 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 37 treesize of output 21 [2022-01-18 05:33:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:01,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:01,486 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:01,486 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 [2022-01-18 05:33:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,546 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 7 [2022-01-18 05:33:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:01,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877723498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:01,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:01,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 05:33:01,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344864809] [2022-01-18 05:33:01,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:33:01,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:33:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:33:01,594 INFO L87 Difference]: Start difference. First operand 12325 states and 56691 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:03,799 INFO L93 Difference]: Finished difference Result 15305 states and 68662 transitions. [2022-01-18 05:33:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:33:03,799 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:03,845 INFO L225 Difference]: With dead ends: 15305 [2022-01-18 05:33:03,845 INFO L226 Difference]: Without dead ends: 15253 [2022-01-18 05:33:03,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:33:03,846 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 759 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:03,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 994 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2860 Invalid, 0 Unknown, 499 Unchecked, 1.2s Time] [2022-01-18 05:33:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2022-01-18 05:33:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 12871. [2022-01-18 05:33:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12871 states, 12870 states have (on average 4.6015540015540015) internal successors, (59222), 12870 states have internal predecessors, (59222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12871 states to 12871 states and 59222 transitions. [2022-01-18 05:33:04,153 INFO L78 Accepts]: Start accepts. Automaton has 12871 states and 59222 transitions. Word has length 33 [2022-01-18 05:33:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:04,153 INFO L470 AbstractCegarLoop]: Abstraction has 12871 states and 59222 transitions. [2022-01-18 05:33:04,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12871 states and 59222 transitions. [2022-01-18 05:33:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:04,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:04,180 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, 1, 1, 1] [2022-01-18 05:33:04,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:04,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:04,381 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1619082119, now seen corresponding path program 74 times [2022-01-18 05:33:04,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105897772] [2022-01-18 05:33:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:04,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:04,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:04,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105897772] [2022-01-18 05:33:04,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105897772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439673370] [2022-01-18 05:33:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:04,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:04,557 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) [2022-01-18 05:33:04,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 05:33:04,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:04,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:04,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:33:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:05,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:05,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:05,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:33:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:05,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:33:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:05,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439673370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:05,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 05:33:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888661219] [2022-01-18 05:33:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:05,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:05,714 INFO L87 Difference]: Start difference. First operand 12871 states and 59222 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:33:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:07,445 INFO L93 Difference]: Finished difference Result 13881 states and 63291 transitions. [2022-01-18 05:33:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:33:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 05:33:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:07,488 INFO L225 Difference]: With dead ends: 13881 [2022-01-18 05:33:07,488 INFO L226 Difference]: Without dead ends: 13860 [2022-01-18 05:33:07,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:33:07,488 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 614 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 608 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:07,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 808 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2222 Invalid, 0 Unknown, 608 Unchecked, 0.9s Time] [2022-01-18 05:33:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13860 states. [2022-01-18 05:33:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13860 to 12916. [2022-01-18 05:33:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12916 states, 12915 states have (on average 4.598915989159892) internal successors, (59395), 12915 states have internal predecessors, (59395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12916 states to 12916 states and 59395 transitions. [2022-01-18 05:33:07,758 INFO L78 Accepts]: Start accepts. Automaton has 12916 states and 59395 transitions. Word has length 33 [2022-01-18 05:33:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:07,758 INFO L470 AbstractCegarLoop]: Abstraction has 12916 states and 59395 transitions. [2022-01-18 05:33:07,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:33:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 12916 states and 59395 transitions. [2022-01-18 05:33:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:07,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:07,786 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, 1, 1, 1] [2022-01-18 05:33:07,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:07,986 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,SelfDestructingSolverStorable175 [2022-01-18 05:33:07,986 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1912485126, now seen corresponding path program 1 times [2022-01-18 05:33:07,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:07,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545775486] [2022-01-18 05:33:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:07,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:08,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545775486] [2022-01-18 05:33:08,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545775486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314199111] [2022-01-18 05:33:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:08,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:08,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:08,169 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) [2022-01-18 05:33:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 05:33:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:08,483 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 37 treesize of output 21 [2022-01-18 05:33:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:08,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:08,879 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:08,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:33:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:08,945 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 27 treesize of output 7 [2022-01-18 05:33:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314199111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:08,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:08,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 05:33:08,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923279060] [2022-01-18 05:33:08,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:08,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:33:08,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:33:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:33:08,996 INFO L87 Difference]: Start difference. First operand 12916 states and 59395 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:11,404 INFO L93 Difference]: Finished difference Result 15368 states and 68891 transitions. [2022-01-18 05:33:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:33:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:11,450 INFO L225 Difference]: With dead ends: 15368 [2022-01-18 05:33:11,450 INFO L226 Difference]: Without dead ends: 15311 [2022-01-18 05:33:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=544, Invalid=3616, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:33:11,451 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 615 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:11,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1215 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3292 Invalid, 0 Unknown, 575 Unchecked, 1.4s Time] [2022-01-18 05:33:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2022-01-18 05:33:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 12960. [2022-01-18 05:33:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 4.5935643182344315) internal successors, (59528), 12959 states have internal predecessors, (59528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 59528 transitions. [2022-01-18 05:33:11,751 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 59528 transitions. Word has length 33 [2022-01-18 05:33:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:11,751 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 59528 transitions. [2022-01-18 05:33:11,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 59528 transitions. [2022-01-18 05:33:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:11,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:11,779 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, 1, 1, 1] [2022-01-18 05:33:11,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 05:33:11,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:11,979 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 501733676, now seen corresponding path program 8 times [2022-01-18 05:33:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658271699] [2022-01-18 05:33:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:11,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:12,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658271699] [2022-01-18 05:33:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658271699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278463004] [2022-01-18 05:33:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:12,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:12,162 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) [2022-01-18 05:33:12,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 05:33:12,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:12,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:12,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:33:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:13,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:13,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:13,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:33:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:13,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:33:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:13,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278463004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:13,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:13,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 05:33:13,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556593179] [2022-01-18 05:33:13,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:13,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:13,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:13,352 INFO L87 Difference]: Start difference. First operand 12960 states and 59528 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-01-18 05:33:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:15,309 INFO L93 Difference]: Finished difference Result 14238 states and 64285 transitions. [2022-01-18 05:33:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:33:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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 33 [2022-01-18 05:33:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:15,352 INFO L225 Difference]: With dead ends: 14238 [2022-01-18 05:33:15,352 INFO L226 Difference]: Without dead ends: 14219 [2022-01-18 05:33:15,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:33:15,353 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 739 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:15,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 940 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2646 Invalid, 0 Unknown, 586 Unchecked, 1.1s Time] [2022-01-18 05:33:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2022-01-18 05:33:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 12999. [2022-01-18 05:33:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 12998 states have (on average 4.589936913371288) internal successors, (59660), 12998 states have internal predecessors, (59660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 59660 transitions. [2022-01-18 05:33:15,722 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 59660 transitions. Word has length 33 [2022-01-18 05:33:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:15,722 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 59660 transitions. [2022-01-18 05:33:15,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-01-18 05:33:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 59660 transitions. [2022-01-18 05:33:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:15,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:15,749 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, 1, 1, 1] [2022-01-18 05:33:15,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 05:33:15,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:15,949 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash 644860661, now seen corresponding path program 75 times [2022-01-18 05:33:15,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096956279] [2022-01-18 05:33:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:15,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:16,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:16,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096956279] [2022-01-18 05:33:16,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096956279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:16,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210204977] [2022-01-18 05:33:16,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:16,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:16,146 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) [2022-01-18 05:33:16,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 05:33:16,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:33:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:16,444 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:33:16,445 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 31 treesize of output 57 [2022-01-18 05:33:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:16,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:33:16,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210204977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:16,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:16,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 29 [2022-01-18 05:33:16,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330180121] [2022-01-18 05:33:16,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:16,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:16,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:16,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:16,959 INFO L87 Difference]: Start difference. First operand 12999 states and 59660 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:20,478 INFO L93 Difference]: Finished difference Result 15716 states and 70456 transitions. [2022-01-18 05:33:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 05:33:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:20,525 INFO L225 Difference]: With dead ends: 15716 [2022-01-18 05:33:20,526 INFO L226 Difference]: Without dead ends: 15684 [2022-01-18 05:33:20,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=717, Invalid=5289, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 05:33:20,527 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 895 mSDsluCounter, 3552 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:20,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 1482 Invalid, 5031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:33:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2022-01-18 05:33:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 13483. [2022-01-18 05:33:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13483 states, 13482 states have (on average 4.60354546803145) internal successors, (62065), 13482 states have internal predecessors, (62065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13483 states to 13483 states and 62065 transitions. [2022-01-18 05:33:20,974 INFO L78 Accepts]: Start accepts. Automaton has 13483 states and 62065 transitions. Word has length 33 [2022-01-18 05:33:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:20,974 INFO L470 AbstractCegarLoop]: Abstraction has 13483 states and 62065 transitions. [2022-01-18 05:33:20,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 13483 states and 62065 transitions. [2022-01-18 05:33:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:21,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:21,006 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, 1, 1, 1] [2022-01-18 05:33:21,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:21,206 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,SelfDestructingSolverStorable178 [2022-01-18 05:33:21,206 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1998066250, now seen corresponding path program 9 times [2022-01-18 05:33:21,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:21,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520170785] [2022-01-18 05:33:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:21,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:21,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520170785] [2022-01-18 05:33:21,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520170785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918643280] [2022-01-18 05:33:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:21,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:21,406 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) [2022-01-18 05:33:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 05:33:21,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:33:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:21,722 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:33:21,722 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 31 treesize of output 55 [2022-01-18 05:33:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:22,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:33:22,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918643280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:22,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:22,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-01-18 05:33:22,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845554655] [2022-01-18 05:33:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:22,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:33:22,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:33:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:33:22,284 INFO L87 Difference]: Start difference. First operand 13483 states and 62065 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:26,059 INFO L93 Difference]: Finished difference Result 15794 states and 70966 transitions. [2022-01-18 05:33:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 05:33:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:26,109 INFO L225 Difference]: With dead ends: 15794 [2022-01-18 05:33:26,109 INFO L226 Difference]: Without dead ends: 15717 [2022-01-18 05:33:26,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=738, Invalid=6068, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:33:26,110 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 996 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 4654 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 4654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:26,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1439 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4654 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:33:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15717 states. [2022-01-18 05:33:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15717 to 13475. [2022-01-18 05:33:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13475 states, 13474 states have (on average 4.60397803176488) internal successors, (62034), 13474 states have internal predecessors, (62034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13475 states to 13475 states and 62034 transitions. [2022-01-18 05:33:26,414 INFO L78 Accepts]: Start accepts. Automaton has 13475 states and 62034 transitions. Word has length 33 [2022-01-18 05:33:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:26,414 INFO L470 AbstractCegarLoop]: Abstraction has 13475 states and 62034 transitions. [2022-01-18 05:33:26,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 13475 states and 62034 transitions. [2022-01-18 05:33:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:26,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:26,443 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, 1, 1, 1] [2022-01-18 05:33:26,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 05:33:26,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 05:33:26,643 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash 404844174, now seen corresponding path program 2 times [2022-01-18 05:33:26,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:26,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480836409] [2022-01-18 05:33:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:26,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:26,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:26,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480836409] [2022-01-18 05:33:26,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480836409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:26,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920421114] [2022-01-18 05:33:26,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:26,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:26,915 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) [2022-01-18 05:33:26,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 05:33:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:27,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:27,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:33:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:27,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:28,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:28,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:33:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:28,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:33:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920421114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:28,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:28,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 05:33:28,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201991268] [2022-01-18 05:33:28,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:28,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:28,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:28,129 INFO L87 Difference]: Start difference. First operand 13475 states and 62034 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-01-18 05:33:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:30,103 INFO L93 Difference]: Finished difference Result 14582 states and 66324 transitions. [2022-01-18 05:33:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:33:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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 33 [2022-01-18 05:33:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:30,147 INFO L225 Difference]: With dead ends: 14582 [2022-01-18 05:33:30,147 INFO L226 Difference]: Without dead ends: 14545 [2022-01-18 05:33:30,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=416, Invalid=2554, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:33:30,148 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 636 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:30,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 946 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2699 Invalid, 0 Unknown, 697 Unchecked, 1.1s Time] [2022-01-18 05:33:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14545 states. [2022-01-18 05:33:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14545 to 13439. [2022-01-18 05:33:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 4.605968150022325) internal successors, (61895), 13438 states have internal predecessors, (61895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 61895 transitions. [2022-01-18 05:33:30,432 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 61895 transitions. Word has length 33 [2022-01-18 05:33:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:30,432 INFO L470 AbstractCegarLoop]: Abstraction has 13439 states and 61895 transitions. [2022-01-18 05:33:30,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 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) [2022-01-18 05:33:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 61895 transitions. [2022-01-18 05:33:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:30,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:30,460 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, 1, 1, 1] [2022-01-18 05:33:30,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 05:33:30,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:30,661 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash -85793105, now seen corresponding path program 76 times [2022-01-18 05:33:30,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976792465] [2022-01-18 05:33:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:30,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:30,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976792465] [2022-01-18 05:33:30,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976792465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579356923] [2022-01-18 05:33:30,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:33:30,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:30,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:30,857 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) [2022-01-18 05:33:30,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 05:33:30,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:33:30,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,188 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 37 treesize of output 21 [2022-01-18 05:33:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:31,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:31,582 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:31,583 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 27 treesize of output 48 [2022-01-18 05:33:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,656 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 7 [2022-01-18 05:33:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:31,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579356923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:31,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:31,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:33:31,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485759753] [2022-01-18 05:33:31,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:31,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:33:31,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:33:31,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:33:31,707 INFO L87 Difference]: Start difference. First operand 13439 states and 61895 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:35,049 INFO L93 Difference]: Finished difference Result 15258 states and 69034 transitions. [2022-01-18 05:33:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:33:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:35,095 INFO L225 Difference]: With dead ends: 15258 [2022-01-18 05:33:35,095 INFO L226 Difference]: Without dead ends: 15188 [2022-01-18 05:33:35,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=605, Invalid=5557, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 05:33:35,096 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 682 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:35,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1390 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:33:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2022-01-18 05:33:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 13495. [2022-01-18 05:33:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 4.607899807321773) internal successors, (62179), 13494 states have internal predecessors, (62179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 62179 transitions. [2022-01-18 05:33:35,399 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 62179 transitions. Word has length 33 [2022-01-18 05:33:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 13495 states and 62179 transitions. [2022-01-18 05:33:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 62179 transitions. [2022-01-18 05:33:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:35,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:35,428 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, 1, 1, 1] [2022-01-18 05:33:35,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:35,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:35,629 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1217129040, now seen corresponding path program 10 times [2022-01-18 05:33:35,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:35,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645352473] [2022-01-18 05:33:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:35,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:35,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645352473] [2022-01-18 05:33:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645352473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345711792] [2022-01-18 05:33:35,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:33:35,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:35,804 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) [2022-01-18 05:33:35,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 05:33:35,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:33:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:35,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:36,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 05:33:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:36,489 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:36,489 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 [2022-01-18 05:33:36,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:36,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:36,555 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 27 treesize of output 7 [2022-01-18 05:33:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:36,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345711792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:36,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:36,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:33:36,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428557344] [2022-01-18 05:33:36,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:36,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:36,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:36,606 INFO L87 Difference]: Start difference. First operand 13495 states and 62179 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:39,005 INFO L93 Difference]: Finished difference Result 15253 states and 68928 transitions. [2022-01-18 05:33:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:33:39,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:39,060 INFO L225 Difference]: With dead ends: 15253 [2022-01-18 05:33:39,060 INFO L226 Difference]: Without dead ends: 15117 [2022-01-18 05:33:39,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=544, Invalid=4148, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:33:39,061 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 714 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 3433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1056 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:33:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2022-01-18 05:33:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 13368. [2022-01-18 05:33:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13368 states, 13367 states have (on average 4.613451036133762) internal successors, (61668), 13367 states have internal predecessors, (61668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 61668 transitions. [2022-01-18 05:33:39,626 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 61668 transitions. Word has length 33 [2022-01-18 05:33:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:39,626 INFO L470 AbstractCegarLoop]: Abstraction has 13368 states and 61668 transitions. [2022-01-18 05:33:39,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 61668 transitions. [2022-01-18 05:33:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:39,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:39,655 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, 1, 1, 1] [2022-01-18 05:33:39,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 05:33:39,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:39,857 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1950848000, now seen corresponding path program 11 times [2022-01-18 05:33:39,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326105528] [2022-01-18 05:33:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:39,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:40,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326105528] [2022-01-18 05:33:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326105528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833311566] [2022-01-18 05:33:40,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:33:40,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:40,126 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) [2022-01-18 05:33:40,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 05:33:40,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:33:40,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:40,444 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 37 treesize of output 21 [2022-01-18 05:33:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:40,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:40,864 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:40,864 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 [2022-01-18 05:33:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:40,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:33:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833311566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:40,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:40,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:33:40,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484210440] [2022-01-18 05:33:40,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:33:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:33:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:33:40,972 INFO L87 Difference]: Start difference. First operand 13368 states and 61668 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:45,696 INFO L93 Difference]: Finished difference Result 17311 states and 76331 transitions. [2022-01-18 05:33:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:33:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:45,748 INFO L225 Difference]: With dead ends: 17311 [2022-01-18 05:33:45,748 INFO L226 Difference]: Without dead ends: 17195 [2022-01-18 05:33:45,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1134, Invalid=8178, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 05:33:45,750 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1187 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 4445 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 4445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:45,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1403 Invalid, 4713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 4445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:33:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2022-01-18 05:33:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 13877. [2022-01-18 05:33:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 13876 states have (on average 4.615451138656673) internal successors, (64044), 13876 states have internal predecessors, (64044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 64044 transitions. [2022-01-18 05:33:46,101 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 64044 transitions. Word has length 33 [2022-01-18 05:33:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:46,101 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 64044 transitions. [2022-01-18 05:33:46,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 64044 transitions. [2022-01-18 05:33:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:46,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:46,129 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, 1, 1, 1] [2022-01-18 05:33:46,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 05:33:46,329 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,SelfDestructingSolverStorable183 [2022-01-18 05:33:46,329 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 154751753, now seen corresponding path program 77 times [2022-01-18 05:33:46,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639965260] [2022-01-18 05:33:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:46,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:46,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639965260] [2022-01-18 05:33:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639965260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794332530] [2022-01-18 05:33:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:33:46,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:46,660 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) [2022-01-18 05:33:46,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 05:33:46,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:33:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:46,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:46,999 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 37 treesize of output 21 [2022-01-18 05:33:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:47,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:47,396 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:47,397 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 [2022-01-18 05:33:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:47,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:47,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:33:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:47,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794332530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:47,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:47,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:33:47,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032414017] [2022-01-18 05:33:47,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:47,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:33:47,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:33:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:33:47,511 INFO L87 Difference]: Start difference. First operand 13877 states and 64044 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:51,433 INFO L93 Difference]: Finished difference Result 16887 states and 74647 transitions. [2022-01-18 05:33:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 05:33:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:51,484 INFO L225 Difference]: With dead ends: 16887 [2022-01-18 05:33:51,484 INFO L226 Difference]: Without dead ends: 16688 [2022-01-18 05:33:51,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=922, Invalid=6218, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 05:33:51,485 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 922 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:51,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1310 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:33:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-01-18 05:33:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 13644. [2022-01-18 05:33:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13643 states have (on average 4.622590339368174) internal successors, (63066), 13643 states have internal predecessors, (63066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 63066 transitions. [2022-01-18 05:33:51,826 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 63066 transitions. Word has length 33 [2022-01-18 05:33:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:51,826 INFO L470 AbstractCegarLoop]: Abstraction has 13644 states and 63066 transitions. [2022-01-18 05:33:51,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 63066 transitions. [2022-01-18 05:33:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:51,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:51,855 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, 1, 1, 1] [2022-01-18 05:33:51,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 05:33:52,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:52,056 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1957996389, now seen corresponding path program 78 times [2022-01-18 05:33:52,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:52,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158103866] [2022-01-18 05:33:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:52,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:52,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158103866] [2022-01-18 05:33:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158103866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108532517] [2022-01-18 05:33:52,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:33:52,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:52,312 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) [2022-01-18 05:33:52,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 05:33:52,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:33:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:52,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:52,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 05:33:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:53,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:53,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:33:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:53,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:33:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108532517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:53,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:53,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:33:53,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606771070] [2022-01-18 05:33:53,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:53,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:33:53,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:33:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2022-01-18 05:33:53,909 INFO L87 Difference]: Start difference. First operand 13644 states and 63066 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:58,118 INFO L93 Difference]: Finished difference Result 16340 states and 72549 transitions. [2022-01-18 05:33:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:33:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:33:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:58,167 INFO L225 Difference]: With dead ends: 16340 [2022-01-18 05:33:58,167 INFO L226 Difference]: Without dead ends: 16295 [2022-01-18 05:33:58,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=617, Invalid=5234, Unknown=1, NotChecked=0, Total=5852 [2022-01-18 05:33:58,168 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 870 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 4814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:58,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1527 Invalid, 4814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3871 Invalid, 0 Unknown, 830 Unchecked, 1.7s Time] [2022-01-18 05:33:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2022-01-18 05:33:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 13990. [2022-01-18 05:33:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13990 states, 13989 states have (on average 4.611480448924155) internal successors, (64510), 13989 states have internal predecessors, (64510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13990 states to 13990 states and 64510 transitions. [2022-01-18 05:33:58,510 INFO L78 Accepts]: Start accepts. Automaton has 13990 states and 64510 transitions. Word has length 33 [2022-01-18 05:33:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:58,510 INFO L470 AbstractCegarLoop]: Abstraction has 13990 states and 64510 transitions. [2022-01-18 05:33:58,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13990 states and 64510 transitions. [2022-01-18 05:33:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:33:58,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:58,540 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, 1, 1, 1] [2022-01-18 05:33:58,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 05:33:58,740 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,SelfDestructingSolverStorable185 [2022-01-18 05:33:58,740 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:33:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 556372605, now seen corresponding path program 79 times [2022-01-18 05:33:58,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:58,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125863060] [2022-01-18 05:33:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:58,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125863060] [2022-01-18 05:33:58,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125863060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411632652] [2022-01-18 05:33:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:58,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:58,983 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) [2022-01-18 05:33:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 05:33:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:59,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:33:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:59,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:59,311 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 35 treesize of output 19 [2022-01-18 05:33:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:59,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:59,715 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:33:59,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:33:59,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:59,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:59,780 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 7 [2022-01-18 05:33:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:59,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411632652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:59,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:59,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:33:59,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781441108] [2022-01-18 05:33:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:33:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:33:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:33:59,829 INFO L87 Difference]: Start difference. First operand 13990 states and 64510 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:04,921 INFO L93 Difference]: Finished difference Result 17717 states and 77823 transitions. [2022-01-18 05:34:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 05:34:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:04,974 INFO L225 Difference]: With dead ends: 17717 [2022-01-18 05:34:04,974 INFO L226 Difference]: Without dead ends: 17624 [2022-01-18 05:34:04,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=976, Invalid=8726, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 05:34:04,975 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1025 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:04,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1638 Invalid, 5614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5401 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:34:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2022-01-18 05:34:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 14382. [2022-01-18 05:34:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 4.611640358806759) internal successors, (66320), 14381 states have internal predecessors, (66320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 66320 transitions. [2022-01-18 05:34:05,341 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 66320 transitions. Word has length 33 [2022-01-18 05:34:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:05,341 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 66320 transitions. [2022-01-18 05:34:05,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 66320 transitions. [2022-01-18 05:34:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:05,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:05,372 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, 1, 1, 1] [2022-01-18 05:34:05,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 05:34:05,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:05,573 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1649347995, now seen corresponding path program 80 times [2022-01-18 05:34:05,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904370094] [2022-01-18 05:34:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:05,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:05,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904370094] [2022-01-18 05:34:05,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904370094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418657618] [2022-01-18 05:34:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:34:05,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:05,808 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) [2022-01-18 05:34:05,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 05:34:05,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:34:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:06,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:06,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:34:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:06,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:06,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:06,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:34:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:06,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:34:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:06,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418657618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:06,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:06,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:34:06,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510877239] [2022-01-18 05:34:06,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:06,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:34:06,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:06,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:34:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:34:06,995 INFO L87 Difference]: Start difference. First operand 14382 states and 66320 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:10,580 INFO L93 Difference]: Finished difference Result 17214 states and 75992 transitions. [2022-01-18 05:34:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:34:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:10,649 INFO L225 Difference]: With dead ends: 17214 [2022-01-18 05:34:10,649 INFO L226 Difference]: Without dead ends: 17120 [2022-01-18 05:34:10,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=654, Invalid=4896, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:34:10,650 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1151 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:10,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1131 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3385 Invalid, 0 Unknown, 931 Unchecked, 1.5s Time] [2022-01-18 05:34:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17120 states. [2022-01-18 05:34:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17120 to 14420. [2022-01-18 05:34:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 4.612871905125182) internal successors, (66513), 14419 states have internal predecessors, (66513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 66513 transitions. [2022-01-18 05:34:11,036 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 66513 transitions. Word has length 33 [2022-01-18 05:34:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:11,036 INFO L470 AbstractCegarLoop]: Abstraction has 14420 states and 66513 transitions. [2022-01-18 05:34:11,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 66513 transitions. [2022-01-18 05:34:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:11,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:11,067 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, 1, 1, 1] [2022-01-18 05:34:11,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 05:34:11,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:11,268 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash 950808259, now seen corresponding path program 81 times [2022-01-18 05:34:11,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:11,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22974463] [2022-01-18 05:34:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:11,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:11,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22974463] [2022-01-18 05:34:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22974463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960621829] [2022-01-18 05:34:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:34:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:11,510 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) [2022-01-18 05:34:11,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 05:34:11,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:34:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 05:34:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:11,895 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 33 treesize of output 21 [2022-01-18 05:34:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:12,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:12,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960621829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:12,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:12,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 05:34:12,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033226766] [2022-01-18 05:34:12,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:12,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:34:12,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:34:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:34:12,495 INFO L87 Difference]: Start difference. First operand 14420 states and 66513 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:18,705 INFO L93 Difference]: Finished difference Result 20636 states and 90422 transitions. [2022-01-18 05:34:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 05:34:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:18,768 INFO L225 Difference]: With dead ends: 20636 [2022-01-18 05:34:18,769 INFO L226 Difference]: Without dead ends: 20566 [2022-01-18 05:34:18,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 05:34:18,770 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1319 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 5252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:18,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 1638 Invalid, 5596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 05:34:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20566 states. [2022-01-18 05:34:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20566 to 15044. [2022-01-18 05:34:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15044 states, 15043 states have (on average 4.6553878880542445) internal successors, (70031), 15043 states have internal predecessors, (70031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15044 states to 15044 states and 70031 transitions. [2022-01-18 05:34:19,199 INFO L78 Accepts]: Start accepts. Automaton has 15044 states and 70031 transitions. Word has length 33 [2022-01-18 05:34:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 15044 states and 70031 transitions. [2022-01-18 05:34:19,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15044 states and 70031 transitions. [2022-01-18 05:34:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:19,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:19,231 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, 1, 1, 1] [2022-01-18 05:34:19,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 05:34:19,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 05:34:19,432 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1259566239, now seen corresponding path program 82 times [2022-01-18 05:34:19,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985499024] [2022-01-18 05:34:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:19,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:19,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985499024] [2022-01-18 05:34:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985499024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958649517] [2022-01-18 05:34:19,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:34:19,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:19,732 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) [2022-01-18 05:34:19,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 05:34:19,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:34:19,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:20,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:20,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 05:34:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:20,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:20,539 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:34:20,539 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 [2022-01-18 05:34:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:20,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:34:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958649517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:20,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:20,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:34:20,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977090807] [2022-01-18 05:34:20,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:20,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:34:20,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:34:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:34:20,640 INFO L87 Difference]: Start difference. First operand 15044 states and 70031 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:25,788 INFO L93 Difference]: Finished difference Result 17637 states and 79021 transitions. [2022-01-18 05:34:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:34:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:25,841 INFO L225 Difference]: With dead ends: 17637 [2022-01-18 05:34:25,842 INFO L226 Difference]: Without dead ends: 17500 [2022-01-18 05:34:25,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=865, Invalid=8065, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:34:25,843 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1038 mSDsluCounter, 4251 mSDsCounter, 0 mSdLazyCounter, 5254 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 5655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:25,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1634 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5254 Invalid, 0 Unknown, 165 Unchecked, 2.3s Time] [2022-01-18 05:34:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17500 states. [2022-01-18 05:34:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17500 to 15001. [2022-01-18 05:34:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15001 states, 15000 states have (on average 4.658066666666667) internal successors, (69871), 15000 states have internal predecessors, (69871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15001 states to 15001 states and 69871 transitions. [2022-01-18 05:34:26,218 INFO L78 Accepts]: Start accepts. Automaton has 15001 states and 69871 transitions. Word has length 33 [2022-01-18 05:34:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:26,218 INFO L470 AbstractCegarLoop]: Abstraction has 15001 states and 69871 transitions. [2022-01-18 05:34:26,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 15001 states and 69871 transitions. [2022-01-18 05:34:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:26,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:26,250 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, 1, 1, 1] [2022-01-18 05:34:26,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 05:34:26,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 05:34:26,450 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1205308463, now seen corresponding path program 83 times [2022-01-18 05:34:26,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:26,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78469633] [2022-01-18 05:34:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:26,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:26,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78469633] [2022-01-18 05:34:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78469633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976618566] [2022-01-18 05:34:26,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:34:26,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:26,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:26,646 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) [2022-01-18 05:34:26,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 05:34:26,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:34:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:26,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:26,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:26,960 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 37 treesize of output 21 [2022-01-18 05:34:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:27,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:27,330 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:34:27,330 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 [2022-01-18 05:34:27,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:27,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:27,395 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 7 [2022-01-18 05:34:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:27,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976618566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:27,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:27,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 05:34:27,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213849239] [2022-01-18 05:34:27,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:27,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:34:27,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:34:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:34:27,444 INFO L87 Difference]: Start difference. First operand 15001 states and 69871 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:30,073 INFO L93 Difference]: Finished difference Result 16718 states and 76386 transitions. [2022-01-18 05:34:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:34:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:30,124 INFO L225 Difference]: With dead ends: 16718 [2022-01-18 05:34:30,124 INFO L226 Difference]: Without dead ends: 16614 [2022-01-18 05:34:30,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:34:30,124 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 746 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:30,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 998 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:34:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16614 states. [2022-01-18 05:34:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16614 to 15258. [2022-01-18 05:34:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15258 states, 15257 states have (on average 4.659041751327259) internal successors, (71083), 15257 states have internal predecessors, (71083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 71083 transitions. [2022-01-18 05:34:30,470 INFO L78 Accepts]: Start accepts. Automaton has 15258 states and 71083 transitions. Word has length 33 [2022-01-18 05:34:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 15258 states and 71083 transitions. [2022-01-18 05:34:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15258 states and 71083 transitions. [2022-01-18 05:34:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:30,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:30,502 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, 1, 1, 1] [2022-01-18 05:34:30,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 05:34:30,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:30,704 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1151921943, now seen corresponding path program 84 times [2022-01-18 05:34:30,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:30,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474482482] [2022-01-18 05:34:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:30,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:31,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474482482] [2022-01-18 05:34:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474482482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022622080] [2022-01-18 05:34:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:34:31,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:31,012 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) [2022-01-18 05:34:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 05:34:31,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:34:31,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:34:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:31,336 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:34:31,336 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 33 treesize of output 57 [2022-01-18 05:34:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022622080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:31,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:31,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2022-01-18 05:34:31,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004613975] [2022-01-18 05:34:31,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:31,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:34:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:34:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:34:31,945 INFO L87 Difference]: Start difference. First operand 15258 states and 71083 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:35,603 INFO L93 Difference]: Finished difference Result 18861 states and 84076 transitions. [2022-01-18 05:34:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:34:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:35,661 INFO L225 Difference]: With dead ends: 18861 [2022-01-18 05:34:35,661 INFO L226 Difference]: Without dead ends: 18759 [2022-01-18 05:34:35,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=676, Invalid=4874, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:34:35,662 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1317 mSDsluCounter, 3482 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:35,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1375 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:34:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18759 states. [2022-01-18 05:34:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18759 to 15447. [2022-01-18 05:34:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15447 states, 15446 states have (on average 4.659264534507316) internal successors, (71967), 15446 states have internal predecessors, (71967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 71967 transitions. [2022-01-18 05:34:36,178 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 71967 transitions. Word has length 33 [2022-01-18 05:34:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 15447 states and 71967 transitions. [2022-01-18 05:34:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 71967 transitions. [2022-01-18 05:34:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:36,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:36,214 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, 1, 1, 1] [2022-01-18 05:34:36,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 05:34:36,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-01-18 05:34:36,414 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash -142329247, now seen corresponding path program 85 times [2022-01-18 05:34:36,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:36,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79445174] [2022-01-18 05:34:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:36,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:36,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:36,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79445174] [2022-01-18 05:34:36,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79445174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:36,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510559374] [2022-01-18 05:34:36,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:34:36,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:36,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:36,596 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) [2022-01-18 05:34:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 05:34:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:36,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:36,908 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 37 treesize of output 21 [2022-01-18 05:34:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:37,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:37,291 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:34:37,291 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 [2022-01-18 05:34:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:37,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:34:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:37,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510559374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:37,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:37,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:34:37,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956550029] [2022-01-18 05:34:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:34:37,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:34:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:34:37,400 INFO L87 Difference]: Start difference. First operand 15447 states and 71967 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:40,242 INFO L93 Difference]: Finished difference Result 16976 states and 77789 transitions. [2022-01-18 05:34:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 05:34:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:40,296 INFO L225 Difference]: With dead ends: 16976 [2022-01-18 05:34:40,296 INFO L226 Difference]: Without dead ends: 16789 [2022-01-18 05:34:40,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=754, Invalid=6052, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:34:40,298 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 778 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:40,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1038 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:34:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2022-01-18 05:34:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15392. [2022-01-18 05:34:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15392 states, 15391 states have (on average 4.659866155545449) internal successors, (71720), 15391 states have internal predecessors, (71720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 71720 transitions. [2022-01-18 05:34:40,847 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 71720 transitions. Word has length 33 [2022-01-18 05:34:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:40,848 INFO L470 AbstractCegarLoop]: Abstraction has 15392 states and 71720 transitions. [2022-01-18 05:34:40,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 71720 transitions. [2022-01-18 05:34:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:40,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:40,882 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, 1, 1, 1] [2022-01-18 05:34:40,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 05:34:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:41,083 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash -654878009, now seen corresponding path program 86 times [2022-01-18 05:34:41,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579624225] [2022-01-18 05:34:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:41,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:41,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579624225] [2022-01-18 05:34:41,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579624225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574866177] [2022-01-18 05:34:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:34:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:41,268 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) [2022-01-18 05:34:41,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 05:34:41,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:34:41,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:41,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:41,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:34:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:42,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:42,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:42,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:34:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:42,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:34:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:42,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574866177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:42,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:42,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 05:34:42,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407184163] [2022-01-18 05:34:42,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:42,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:34:42,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:42,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:34:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:34:42,390 INFO L87 Difference]: Start difference. First operand 15392 states and 71720 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) 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) [2022-01-18 05:34:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:44,025 INFO L93 Difference]: Finished difference Result 16443 states and 75671 transitions. [2022-01-18 05:34:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:34:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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 33 [2022-01-18 05:34:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:44,077 INFO L225 Difference]: With dead ends: 16443 [2022-01-18 05:34:44,077 INFO L226 Difference]: Without dead ends: 16426 [2022-01-18 05:34:44,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:34:44,077 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 527 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:44,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 884 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2602 Invalid, 0 Unknown, 536 Unchecked, 1.0s Time] [2022-01-18 05:34:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-01-18 05:34:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 15399. [2022-01-18 05:34:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 4.660085725418885) internal successors, (71756), 15398 states have internal predecessors, (71756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 71756 transitions. [2022-01-18 05:34:44,431 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 71756 transitions. Word has length 33 [2022-01-18 05:34:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:44,431 INFO L470 AbstractCegarLoop]: Abstraction has 15399 states and 71756 transitions. [2022-01-18 05:34:44,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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) [2022-01-18 05:34:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 71756 transitions. [2022-01-18 05:34:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:44,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:44,465 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, 1, 1, 1] [2022-01-18 05:34:44,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 05:34:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:44,665 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1554240081, now seen corresponding path program 87 times [2022-01-18 05:34:44,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:44,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934033258] [2022-01-18 05:34:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:44,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:44,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934033258] [2022-01-18 05:34:44,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934033258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420518964] [2022-01-18 05:34:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:34:44,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:44,907 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) [2022-01-18 05:34:44,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 05:34:45,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:34:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:45,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:45,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:34:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:48,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:48,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:48,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:34:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:48,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:34:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420518964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:48,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:34:48,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219831751] [2022-01-18 05:34:48,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:48,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:34:48,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:34:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1063, Unknown=1, NotChecked=0, Total=1190 [2022-01-18 05:34:48,371 INFO L87 Difference]: Start difference. First operand 15399 states and 71756 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:52,160 INFO L93 Difference]: Finished difference Result 18711 states and 83306 transitions. [2022-01-18 05:34:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 05:34:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:52,218 INFO L225 Difference]: With dead ends: 18711 [2022-01-18 05:34:52,219 INFO L226 Difference]: Without dead ends: 18689 [2022-01-18 05:34:52,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=595, Invalid=5884, Unknown=1, NotChecked=0, Total=6480 [2022-01-18 05:34:52,220 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 878 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 4363 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 854 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:52,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1700 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4363 Invalid, 0 Unknown, 854 Unchecked, 1.9s Time] [2022-01-18 05:34:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18689 states. [2022-01-18 05:34:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18689 to 15678. [2022-01-18 05:34:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15678 states, 15677 states have (on average 4.658671939784398) internal successors, (73034), 15677 states have internal predecessors, (73034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15678 states to 15678 states and 73034 transitions. [2022-01-18 05:34:52,628 INFO L78 Accepts]: Start accepts. Automaton has 15678 states and 73034 transitions. Word has length 33 [2022-01-18 05:34:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 15678 states and 73034 transitions. [2022-01-18 05:34:52,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 15678 states and 73034 transitions. [2022-01-18 05:34:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:52,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:52,661 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, 1, 1, 1] [2022-01-18 05:34:52,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:52,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:52,862 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:52,862 INFO L85 PathProgramCache]: Analyzing trace with hash 960128913, now seen corresponding path program 88 times [2022-01-18 05:34:52,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:52,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713612908] [2022-01-18 05:34:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:52,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:53,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713612908] [2022-01-18 05:34:53,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713612908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009932471] [2022-01-18 05:34:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:34:53,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:53,120 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) [2022-01-18 05:34:53,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 05:34:53,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:34:53,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:34:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:53,504 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 37 treesize of output 21 [2022-01-18 05:34:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:53,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:53,960 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:34:53,960 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 27 treesize of output 48 [2022-01-18 05:34:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:54,022 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 7 [2022-01-18 05:34:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009932471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:54,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:54,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:34:54,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207455123] [2022-01-18 05:34:54,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:54,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:34:54,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:34:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:34:54,069 INFO L87 Difference]: Start difference. First operand 15678 states and 73034 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:59,130 INFO L93 Difference]: Finished difference Result 19928 states and 88107 transitions. [2022-01-18 05:34:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 05:34:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:34:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:59,192 INFO L225 Difference]: With dead ends: 19928 [2022-01-18 05:34:59,192 INFO L226 Difference]: Without dead ends: 19813 [2022-01-18 05:34:59,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1047, Invalid=9459, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 05:34:59,194 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1207 mSDsluCounter, 3820 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:59,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1482 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 05:34:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19813 states. [2022-01-18 05:34:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19813 to 16009. [2022-01-18 05:34:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.664730134932534) internal successors, (74673), 16008 states have internal predecessors, (74673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 74673 transitions. [2022-01-18 05:34:59,652 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 74673 transitions. Word has length 33 [2022-01-18 05:34:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 74673 transitions. [2022-01-18 05:34:59,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 74673 transitions. [2022-01-18 05:34:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:34:59,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:59,687 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, 1, 1, 1] [2022-01-18 05:34:59,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 05:34:59,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:59,887 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:34:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2002515719, now seen corresponding path program 89 times [2022-01-18 05:34:59,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:59,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983129198] [2022-01-18 05:34:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:59,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:00,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:00,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983129198] [2022-01-18 05:35:00,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983129198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:00,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319422165] [2022-01-18 05:35:00,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:35:00,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:00,066 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) [2022-01-18 05:35:00,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 05:35:00,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:35:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:00,418 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 37 treesize of output 21 [2022-01-18 05:35:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:00,877 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:00,877 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 [2022-01-18 05:35:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:00,941 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 7 [2022-01-18 05:35:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:00,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319422165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:00,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:00,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:35:00,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927207501] [2022-01-18 05:35:00,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:00,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:35:00,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:00,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:35:00,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:35:00,989 INFO L87 Difference]: Start difference. First operand 16009 states and 74673 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:03,708 INFO L93 Difference]: Finished difference Result 17781 states and 81478 transitions. [2022-01-18 05:35:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:35:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:03,765 INFO L225 Difference]: With dead ends: 17781 [2022-01-18 05:35:03,765 INFO L226 Difference]: Without dead ends: 17651 [2022-01-18 05:35:03,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=572, Invalid=5280, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:35:03,766 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 700 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:03,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1209 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3379 Invalid, 0 Unknown, 492 Unchecked, 1.5s Time] [2022-01-18 05:35:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2022-01-18 05:35:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 15985. [2022-01-18 05:35:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15985 states, 15984 states have (on average 4.662787787787788) internal successors, (74530), 15984 states have internal predecessors, (74530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15985 states to 15985 states and 74530 transitions. [2022-01-18 05:35:04,139 INFO L78 Accepts]: Start accepts. Automaton has 15985 states and 74530 transitions. Word has length 33 [2022-01-18 05:35:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:04,139 INFO L470 AbstractCegarLoop]: Abstraction has 15985 states and 74530 transitions. [2022-01-18 05:35:04,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15985 states and 74530 transitions. [2022-01-18 05:35:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:04,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:04,173 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, 1, 1, 1] [2022-01-18 05:35:04,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 05:35:04,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:04,374 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1115012038, now seen corresponding path program 12 times [2022-01-18 05:35:04,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:04,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48620606] [2022-01-18 05:35:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:04,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:04,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:04,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48620606] [2022-01-18 05:35:04,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48620606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:04,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342777141] [2022-01-18 05:35:04,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:04,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:04,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:04,555 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) [2022-01-18 05:35:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 05:35:04,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:35:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:04,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:04,909 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:35:04,909 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 32 treesize of output 56 [2022-01-18 05:35:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:05,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:35:05,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342777141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:05,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:05,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 30 [2022-01-18 05:35:05,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597959612] [2022-01-18 05:35:05,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:05,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:05,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:05,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:05,413 INFO L87 Difference]: Start difference. First operand 15985 states and 74530 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:08,537 INFO L93 Difference]: Finished difference Result 18228 states and 83086 transitions. [2022-01-18 05:35:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:35:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:08,595 INFO L225 Difference]: With dead ends: 18228 [2022-01-18 05:35:08,595 INFO L226 Difference]: Without dead ends: 18148 [2022-01-18 05:35:08,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:35:08,595 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 918 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:08,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1229 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 05:35:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18148 states. [2022-01-18 05:35:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18148 to 16027. [2022-01-18 05:35:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16027 states, 16026 states have (on average 4.663234743541745) internal successors, (74733), 16026 states have internal predecessors, (74733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16027 states to 16027 states and 74733 transitions. [2022-01-18 05:35:08,965 INFO L78 Accepts]: Start accepts. Automaton has 16027 states and 74733 transitions. Word has length 33 [2022-01-18 05:35:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:08,965 INFO L470 AbstractCegarLoop]: Abstraction has 16027 states and 74733 transitions. [2022-01-18 05:35:08,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 16027 states and 74733 transitions. [2022-01-18 05:35:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:08,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:08,999 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, 1, 1, 1] [2022-01-18 05:35:09,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 05:35:09,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:09,200 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1352994994, now seen corresponding path program 13 times [2022-01-18 05:35:09,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:09,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276437220] [2022-01-18 05:35:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:09,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:09,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276437220] [2022-01-18 05:35:09,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276437220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155528380] [2022-01-18 05:35:09,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:09,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:09,376 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) [2022-01-18 05:35:09,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 05:35:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:09,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:09,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:09,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:10,122 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:10,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:35:10,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:10,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:10,184 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 27 treesize of output 7 [2022-01-18 05:35:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:10,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155528380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:10,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:35:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877331899] [2022-01-18 05:35:10,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:35:10,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:35:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:35:10,232 INFO L87 Difference]: Start difference. First operand 16027 states and 74733 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:12,803 INFO L93 Difference]: Finished difference Result 17634 states and 81016 transitions. [2022-01-18 05:35:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:35:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:12,860 INFO L225 Difference]: With dead ends: 17634 [2022-01-18 05:35:12,860 INFO L226 Difference]: Without dead ends: 17555 [2022-01-18 05:35:12,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:35:12,861 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 694 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:12,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 972 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:35:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17555 states. [2022-01-18 05:35:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17555 to 15990. [2022-01-18 05:35:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15990 states, 15989 states have (on average 4.667396334980299) internal successors, (74627), 15989 states have internal predecessors, (74627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 74627 transitions. [2022-01-18 05:35:13,345 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 74627 transitions. Word has length 33 [2022-01-18 05:35:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 15990 states and 74627 transitions. [2022-01-18 05:35:13,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 74627 transitions. [2022-01-18 05:35:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:13,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:13,380 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, 1, 1, 1] [2022-01-18 05:35:13,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 05:35:13,581 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,SelfDestructingSolverStorable198 [2022-01-18 05:35:13,581 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 756920949, now seen corresponding path program 90 times [2022-01-18 05:35:13,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:13,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679959964] [2022-01-18 05:35:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:13,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:13,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:13,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679959964] [2022-01-18 05:35:13,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679959964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:13,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361726719] [2022-01-18 05:35:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:13,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:13,852 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) [2022-01-18 05:35:13,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 05:35:13,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:35:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:14,197 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:35:14,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 05:35:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:14,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:35:14,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361726719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:14,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:14,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-01-18 05:35:14,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475886730] [2022-01-18 05:35:14,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:14,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:35:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:35:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:35:14,799 INFO L87 Difference]: Start difference. First operand 15990 states and 74627 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:19,764 INFO L93 Difference]: Finished difference Result 19522 states and 86559 transitions. [2022-01-18 05:35:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 05:35:19,764 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:19,825 INFO L225 Difference]: With dead ends: 19522 [2022-01-18 05:35:19,826 INFO L226 Difference]: Without dead ends: 19461 [2022-01-18 05:35:19,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=948, Invalid=7424, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 05:35:19,827 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1570 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 5500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:19,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1623 Invalid, 5500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:35:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19461 states. [2022-01-18 05:35:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19461 to 16114. [2022-01-18 05:35:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16114 states, 16113 states have (on average 4.663749767268665) internal successors, (75147), 16113 states have internal predecessors, (75147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 75147 transitions. [2022-01-18 05:35:20,390 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 75147 transitions. Word has length 33 [2022-01-18 05:35:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:20,390 INFO L470 AbstractCegarLoop]: Abstraction has 16114 states and 75147 transitions. [2022-01-18 05:35:20,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 75147 transitions. [2022-01-18 05:35:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:20,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:20,425 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, 1, 1, 1] [2022-01-18 05:35:20,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:20,625 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,SelfDestructingSolverStorable199 [2022-01-18 05:35:20,626 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:20,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1602896501, now seen corresponding path program 91 times [2022-01-18 05:35:20,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:20,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037399070] [2022-01-18 05:35:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:20,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:20,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037399070] [2022-01-18 05:35:20,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037399070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162366293] [2022-01-18 05:35:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:20,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:20,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:20,857 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) [2022-01-18 05:35:20,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 05:35:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,208 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 37 treesize of output 21 [2022-01-18 05:35:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:21,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:21,590 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:21,590 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 [2022-01-18 05:35:21,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:21,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,663 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 7 [2022-01-18 05:35:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162366293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:21,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:21,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:35:21,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254381570] [2022-01-18 05:35:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:35:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:35:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:35:21,713 INFO L87 Difference]: Start difference. First operand 16114 states and 75147 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:27,513 INFO L93 Difference]: Finished difference Result 20429 states and 90191 transitions. [2022-01-18 05:35:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 05:35:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:27,712 INFO L225 Difference]: With dead ends: 20429 [2022-01-18 05:35:27,712 INFO L226 Difference]: Without dead ends: 20249 [2022-01-18 05:35:27,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1160, Invalid=9970, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 05:35:27,713 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1240 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:27,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 1523 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4950 Invalid, 0 Unknown, 526 Unchecked, 2.3s Time] [2022-01-18 05:35:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20249 states. [2022-01-18 05:35:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20249 to 16303. [2022-01-18 05:35:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6705312231628024) internal successors, (76139), 16302 states have internal predecessors, (76139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76139 transitions. [2022-01-18 05:35:28,123 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76139 transitions. Word has length 33 [2022-01-18 05:35:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76139 transitions. [2022-01-18 05:35:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76139 transitions. [2022-01-18 05:35:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:28,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:28,159 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, 1, 1, 1] [2022-01-18 05:35:28,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:28,359 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -62579695, now seen corresponding path program 92 times [2022-01-18 05:35:28,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792954946] [2022-01-18 05:35:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:28,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792954946] [2022-01-18 05:35:28,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792954946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102092247] [2022-01-18 05:35:28,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:28,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:28,538 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) [2022-01-18 05:35:28,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 05:35:28,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:28,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:28,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:28,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:35:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:29,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:29,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:29,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:35:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:29,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 05:35:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:29,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102092247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:29,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:29,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:35:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999586384] [2022-01-18 05:35:29,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:29,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:29,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:29,525 INFO L87 Difference]: Start difference. First operand 16303 states and 76139 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:35:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:31,580 INFO L93 Difference]: Finished difference Result 16950 states and 78639 transitions. [2022-01-18 05:35:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:35:31,580 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 05:35:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:31,636 INFO L225 Difference]: With dead ends: 16950 [2022-01-18 05:35:31,636 INFO L226 Difference]: Without dead ends: 16921 [2022-01-18 05:35:31,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:35:31,637 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 503 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 3298 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:31,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1009 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3298 Invalid, 0 Unknown, 374 Unchecked, 1.3s Time] [2022-01-18 05:35:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2022-01-18 05:35:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16303. [2022-01-18 05:35:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6696110906637225) internal successors, (76124), 16302 states have internal predecessors, (76124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76124 transitions. [2022-01-18 05:35:32,216 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76124 transitions. Word has length 33 [2022-01-18 05:35:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:32,216 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76124 transitions. [2022-01-18 05:35:32,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:35:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76124 transitions. [2022-01-18 05:35:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:32,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:32,254 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, 1, 1, 1] [2022-01-18 05:35:32,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 05:35:32,454 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,SelfDestructingSolverStorable201 [2022-01-18 05:35:32,454 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1889539959, now seen corresponding path program 93 times [2022-01-18 05:35:32,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:32,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987144114] [2022-01-18 05:35:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:32,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:32,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:32,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987144114] [2022-01-18 05:35:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987144114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:32,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479401232] [2022-01-18 05:35:32,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:35:32,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:32,637 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) [2022-01-18 05:35:32,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 05:35:32,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:35:32,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:33,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:33,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:35:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:33,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:33,568 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 17 treesize of output 22 [2022-01-18 05:35:33,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:33,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:35:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479401232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:33,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:33,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:35:33,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847566007] [2022-01-18 05:35:33,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:33,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:33,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:33,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:33,629 INFO L87 Difference]: Start difference. First operand 16303 states and 76124 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:35:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:35,242 INFO L93 Difference]: Finished difference Result 16888 states and 78327 transitions. [2022-01-18 05:35:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:35:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 05:35:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:35,294 INFO L225 Difference]: With dead ends: 16888 [2022-01-18 05:35:35,294 INFO L226 Difference]: Without dead ends: 16860 [2022-01-18 05:35:35,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:35:35,295 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 406 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:35,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 808 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2602 Invalid, 0 Unknown, 235 Unchecked, 1.1s Time] [2022-01-18 05:35:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16860 states. [2022-01-18 05:35:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16860 to 16288. [2022-01-18 05:35:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16288 states, 16287 states have (on average 4.670043593049671) internal successors, (76061), 16287 states have internal predecessors, (76061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 76061 transitions. [2022-01-18 05:35:35,675 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 76061 transitions. Word has length 33 [2022-01-18 05:35:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:35,675 INFO L470 AbstractCegarLoop]: Abstraction has 16288 states and 76061 transitions. [2022-01-18 05:35:35,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 05:35:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 76061 transitions. [2022-01-18 05:35:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:35,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:35,709 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, 1, 1, 1] [2022-01-18 05:35:35,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 05:35:35,910 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1963210305, now seen corresponding path program 94 times [2022-01-18 05:35:35,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737729901] [2022-01-18 05:35:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:35,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:36,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737729901] [2022-01-18 05:35:36,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737729901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130834433] [2022-01-18 05:35:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:35:36,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:36,114 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) [2022-01-18 05:35:36,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 05:35:36,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:35:36,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:36,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:36,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:36,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:36,979 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:36,979 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 [2022-01-18 05:35:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:37,129 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 7 [2022-01-18 05:35:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:37,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130834433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:37,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:37,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:35:37,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890749319] [2022-01-18 05:35:37,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:37,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:35:37,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:35:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:35:37,177 INFO L87 Difference]: Start difference. First operand 16288 states and 76061 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:40,001 INFO L93 Difference]: Finished difference Result 17247 states and 79590 transitions. [2022-01-18 05:35:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:35:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:40,057 INFO L225 Difference]: With dead ends: 17247 [2022-01-18 05:35:40,057 INFO L226 Difference]: Without dead ends: 17104 [2022-01-18 05:35:40,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=4455, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:35:40,058 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 457 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:40,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1341 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:35:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17104 states. [2022-01-18 05:35:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17104 to 16294. [2022-01-18 05:35:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16294 states, 16293 states have (on average 4.669367212913521) internal successors, (76078), 16293 states have internal predecessors, (76078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16294 states to 16294 states and 76078 transitions. [2022-01-18 05:35:40,433 INFO L78 Accepts]: Start accepts. Automaton has 16294 states and 76078 transitions. Word has length 33 [2022-01-18 05:35:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 16294 states and 76078 transitions. [2022-01-18 05:35:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 16294 states and 76078 transitions. [2022-01-18 05:35:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:40,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:40,468 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, 1, 1, 1] [2022-01-18 05:35:40,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 05:35:40,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:40,668 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash -186109133, now seen corresponding path program 95 times [2022-01-18 05:35:40,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:40,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112232828] [2022-01-18 05:35:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:40,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:40,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:40,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112232828] [2022-01-18 05:35:40,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112232828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:40,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725395237] [2022-01-18 05:35:40,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:35:40,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:40,844 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) [2022-01-18 05:35:40,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 05:35:40,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:35:40,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:40,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:41,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:41,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:41,606 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:41,606 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 [2022-01-18 05:35:41,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:41,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:41,672 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 7 [2022-01-18 05:35:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:41,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725395237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:41,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:41,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 05:35:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175542070] [2022-01-18 05:35:41,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:41,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:41,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:41,720 INFO L87 Difference]: Start difference. First operand 16294 states and 76078 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:43,947 INFO L93 Difference]: Finished difference Result 17444 states and 80518 transitions. [2022-01-18 05:35:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 05:35:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:44,003 INFO L225 Difference]: With dead ends: 17444 [2022-01-18 05:35:44,003 INFO L226 Difference]: Without dead ends: 17339 [2022-01-18 05:35:44,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:35:44,004 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 550 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:44,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1114 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 05:35:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-01-18 05:35:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 16250. [2022-01-18 05:35:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16250 states, 16249 states have (on average 4.669641208689765) internal successors, (75877), 16249 states have internal predecessors, (75877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 75877 transitions. [2022-01-18 05:35:44,509 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 75877 transitions. Word has length 33 [2022-01-18 05:35:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:44,509 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 75877 transitions. [2022-01-18 05:35:44,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 75877 transitions. [2022-01-18 05:35:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:44,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:44,544 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, 1, 1, 1] [2022-01-18 05:35:44,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:44,744 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,SelfDestructingSolverStorable204 [2022-01-18 05:35:44,745 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1517085983, now seen corresponding path program 96 times [2022-01-18 05:35:44,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:44,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983313639] [2022-01-18 05:35:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:44,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:44,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:44,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983313639] [2022-01-18 05:35:44,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983313639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:44,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860688912] [2022-01-18 05:35:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:44,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:44,947 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) [2022-01-18 05:35:44,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 05:35:44,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:35:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:45,317 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:35:45,317 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 31 treesize of output 55 [2022-01-18 05:35:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:45,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:45,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860688912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:45,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:45,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 05:35:45,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835573664] [2022-01-18 05:35:45,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:45,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:35:45,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:35:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:35:45,839 INFO L87 Difference]: Start difference. First operand 16250 states and 75877 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:50,579 INFO L93 Difference]: Finished difference Result 19660 states and 89347 transitions. [2022-01-18 05:35:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 05:35:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:50,642 INFO L225 Difference]: With dead ends: 19660 [2022-01-18 05:35:50,642 INFO L226 Difference]: Without dead ends: 19622 [2022-01-18 05:35:50,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=987, Invalid=7943, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:35:50,643 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1188 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 5578 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 5794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 5578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:50,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1637 Invalid, 5794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 5578 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 05:35:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2022-01-18 05:35:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 16466. [2022-01-18 05:35:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16466 states, 16465 states have (on average 4.677862131794716) internal successors, (77021), 16465 states have internal predecessors, (77021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16466 states to 16466 states and 77021 transitions. [2022-01-18 05:35:51,191 INFO L78 Accepts]: Start accepts. Automaton has 16466 states and 77021 transitions. Word has length 33 [2022-01-18 05:35:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:51,191 INFO L470 AbstractCegarLoop]: Abstraction has 16466 states and 77021 transitions. [2022-01-18 05:35:51,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 16466 states and 77021 transitions. [2022-01-18 05:35:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:51,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:51,227 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, 1, 1, 1] [2022-01-18 05:35:51,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 05:35:51,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:51,427 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1474608707, now seen corresponding path program 97 times [2022-01-18 05:35:51,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:51,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981342129] [2022-01-18 05:35:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:51,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:51,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981342129] [2022-01-18 05:35:51,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981342129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441133823] [2022-01-18 05:35:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:51,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:51,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:51,606 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) [2022-01-18 05:35:51,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 05:35:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:51,985 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 37 treesize of output 21 [2022-01-18 05:35:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:52,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:52,359 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:35:52,360 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 [2022-01-18 05:35:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:52,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:52,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:52,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:52,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:35:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:52,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441133823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:52,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:52,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 05:35:52,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222463867] [2022-01-18 05:35:52,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:52,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:52,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:52,465 INFO L87 Difference]: Start difference. First operand 16466 states and 77021 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:54,733 INFO L93 Difference]: Finished difference Result 18802 states and 86234 transitions. [2022-01-18 05:35:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:35:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:35:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:54,794 INFO L225 Difference]: With dead ends: 18802 [2022-01-18 05:35:54,794 INFO L226 Difference]: Without dead ends: 18773 [2022-01-18 05:35:54,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:35:54,795 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 685 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:54,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1274 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3471 Invalid, 0 Unknown, 351 Unchecked, 1.5s Time] [2022-01-18 05:35:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2022-01-18 05:35:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 16847. [2022-01-18 05:35:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16847 states, 16846 states have (on average 4.678499347026) internal successors, (78814), 16846 states have internal predecessors, (78814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 78814 transitions. [2022-01-18 05:35:55,402 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 78814 transitions. Word has length 33 [2022-01-18 05:35:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:55,402 INFO L470 AbstractCegarLoop]: Abstraction has 16847 states and 78814 transitions. [2022-01-18 05:35:55,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 78814 transitions. [2022-01-18 05:35:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:55,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:55,438 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, 1, 1, 1] [2022-01-18 05:35:55,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 05:35:55,639 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,SelfDestructingSolverStorable206 [2022-01-18 05:35:55,639 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1527995227, now seen corresponding path program 98 times [2022-01-18 05:35:55,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428218858] [2022-01-18 05:35:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:55,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:55,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428218858] [2022-01-18 05:35:55,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428218858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284399490] [2022-01-18 05:35:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:55,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:55,864 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) [2022-01-18 05:35:55,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 05:35:55,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:55,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:56,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:56,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 05:35:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:56,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:56,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:35:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:56,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:35:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:56,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284399490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:56,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:56,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:35:56,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873781753] [2022-01-18 05:35:56,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:56,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:56,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:56,914 INFO L87 Difference]: Start difference. First operand 16847 states and 78814 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:35:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:58,272 INFO L93 Difference]: Finished difference Result 17471 states and 81218 transitions. [2022-01-18 05:35:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:35:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 33 [2022-01-18 05:35:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:58,328 INFO L225 Difference]: With dead ends: 17471 [2022-01-18 05:35:58,328 INFO L226 Difference]: Without dead ends: 17458 [2022-01-18 05:35:58,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:35:58,329 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 457 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:58,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 775 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2136 Invalid, 0 Unknown, 436 Unchecked, 0.8s Time] [2022-01-18 05:35:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17458 states. [2022-01-18 05:35:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17458 to 16865. [2022-01-18 05:35:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16865 states, 16864 states have (on average 4.6767670777988615) internal successors, (78869), 16864 states have internal predecessors, (78869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16865 states to 16865 states and 78869 transitions. [2022-01-18 05:35:58,703 INFO L78 Accepts]: Start accepts. Automaton has 16865 states and 78869 transitions. Word has length 33 [2022-01-18 05:35:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:58,703 INFO L470 AbstractCegarLoop]: Abstraction has 16865 states and 78869 transitions. [2022-01-18 05:35:58,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:35:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 16865 states and 78869 transitions. [2022-01-18 05:35:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:35:58,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:58,740 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, 1, 1, 1] [2022-01-18 05:35:58,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 05:35:58,940 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,SelfDestructingSolverStorable207 [2022-01-18 05:35:58,940 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:35:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash 970020710, now seen corresponding path program 14 times [2022-01-18 05:35:58,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330416134] [2022-01-18 05:35:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:58,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:59,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:59,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330416134] [2022-01-18 05:35:59,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330416134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:59,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353658080] [2022-01-18 05:35:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:59,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:59,121 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) [2022-01-18 05:35:59,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 05:35:59,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:59,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:35:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:59,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:59,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 05:35:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:00,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:00,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:36:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:00,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:36:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:00,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353658080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:00,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:00,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:36:00,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517278119] [2022-01-18 05:36:00,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:00,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:36:00,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:36:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:36:00,221 INFO L87 Difference]: Start difference. First operand 16865 states and 78869 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:36:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:01,792 INFO L93 Difference]: Finished difference Result 17530 states and 81382 transitions. [2022-01-18 05:36:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:36:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 33 [2022-01-18 05:36:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:01,895 INFO L225 Difference]: With dead ends: 17530 [2022-01-18 05:36:01,895 INFO L226 Difference]: Without dead ends: 17523 [2022-01-18 05:36:01,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:36:01,895 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 480 mSDsluCounter, 2309 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:01,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2495 Invalid, 0 Unknown, 727 Unchecked, 1.0s Time] [2022-01-18 05:36:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17523 states. [2022-01-18 05:36:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17523 to 16876. [2022-01-18 05:36:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.675318518518519) internal successors, (78896), 16875 states have internal predecessors, (78896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78896 transitions. [2022-01-18 05:36:02,397 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78896 transitions. Word has length 33 [2022-01-18 05:36:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:02,397 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78896 transitions. [2022-01-18 05:36:02,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2022-01-18 05:36:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78896 transitions. [2022-01-18 05:36:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:02,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:02,436 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, 1, 1, 1] [2022-01-18 05:36:02,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 05:36:02,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:02,636 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash -192426458, now seen corresponding path program 15 times [2022-01-18 05:36:02,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:02,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734133069] [2022-01-18 05:36:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:02,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:02,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:02,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734133069] [2022-01-18 05:36:02,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734133069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:02,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809469319] [2022-01-18 05:36:02,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:02,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:02,815 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) [2022-01-18 05:36:02,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 05:36:02,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:36:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:36:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:03,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:03,200 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:36:03,200 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 59 [2022-01-18 05:36:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809469319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:03,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:03,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 05:36:03,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788518025] [2022-01-18 05:36:03,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:03,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:36:03,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:36:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:36:03,696 INFO L87 Difference]: Start difference. First operand 16876 states and 78896 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:07,786 INFO L93 Difference]: Finished difference Result 19651 states and 89482 transitions. [2022-01-18 05:36:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 05:36:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:07,870 INFO L225 Difference]: With dead ends: 19651 [2022-01-18 05:36:07,871 INFO L226 Difference]: Without dead ends: 19625 [2022-01-18 05:36:07,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=837, Invalid=6303, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 05:36:07,872 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1004 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 5511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:07,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1607 Invalid, 5511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5306 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:36:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2022-01-18 05:36:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 16876. [2022-01-18 05:36:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.677688888888889) internal successors, (78936), 16875 states have internal predecessors, (78936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78936 transitions. [2022-01-18 05:36:08,394 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78936 transitions. Word has length 33 [2022-01-18 05:36:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78936 transitions. [2022-01-18 05:36:08,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78936 transitions. [2022-01-18 05:36:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:08,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:08,434 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, 1, 1, 1] [2022-01-18 05:36:08,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-18 05:36:08,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:08,634 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1903053167, now seen corresponding path program 99 times [2022-01-18 05:36:08,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843221402] [2022-01-18 05:36:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:08,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:08,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:08,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843221402] [2022-01-18 05:36:08,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843221402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:08,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692196542] [2022-01-18 05:36:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:08,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:08,814 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) [2022-01-18 05:36:08,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 05:36:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:36:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:36:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:09,190 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 05:36:09,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 59 [2022-01-18 05:36:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:09,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:09,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692196542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:09,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:09,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 05:36:09,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616593902] [2022-01-18 05:36:09,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:09,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:36:09,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:36:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:36:09,736 INFO L87 Difference]: Start difference. First operand 16876 states and 78936 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:14,347 INFO L93 Difference]: Finished difference Result 19762 states and 90087 transitions. [2022-01-18 05:36:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 05:36:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:14,413 INFO L225 Difference]: With dead ends: 19762 [2022-01-18 05:36:14,413 INFO L226 Difference]: Without dead ends: 19713 [2022-01-18 05:36:14,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=7539, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 05:36:14,414 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1127 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5892 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 6112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 5892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:14,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1797 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5892 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 05:36:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19713 states. [2022-01-18 05:36:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19713 to 16775. [2022-01-18 05:36:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-01-18 05:36:14,836 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-01-18 05:36:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:14,837 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-01-18 05:36:14,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-01-18 05:36:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:14,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:14,872 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, 1, 1, 1] [2022-01-18 05:36:14,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 05:36:15,073 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,SelfDestructingSolverStorable210 [2022-01-18 05:36:15,073 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 534833869, now seen corresponding path program 100 times [2022-01-18 05:36:15,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:15,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151751092] [2022-01-18 05:36:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:15,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:15,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151751092] [2022-01-18 05:36:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151751092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935747615] [2022-01-18 05:36:15,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:15,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:15,255 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) [2022-01-18 05:36:15,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 05:36:15,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:36:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:15,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 05:36:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:15,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:16,019 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:36:16,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:36:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:16,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:36:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:16,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935747615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:16,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:16,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:36:16,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947559711] [2022-01-18 05:36:16,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:36:16,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:36:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:36:16,131 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:19,003 INFO L93 Difference]: Finished difference Result 18069 states and 83556 transitions. [2022-01-18 05:36:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:36:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:19,059 INFO L225 Difference]: With dead ends: 18069 [2022-01-18 05:36:19,059 INFO L226 Difference]: Without dead ends: 18033 [2022-01-18 05:36:19,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=457, Invalid=4235, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:36:19,060 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 588 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 4014 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:19,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1278 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4014 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:36:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18033 states. [2022-01-18 05:36:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18033 to 16775. [2022-01-18 05:36:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-01-18 05:36:19,467 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-01-18 05:36:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:19,467 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-01-18 05:36:19,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-01-18 05:36:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:19,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:19,595 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, 1, 1, 1] [2022-01-18 05:36:19,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:19,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 05:36:19,796 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 181694379, now seen corresponding path program 101 times [2022-01-18 05:36:19,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116128612] [2022-01-18 05:36:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:19,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:19,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116128612] [2022-01-18 05:36:19,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116128612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608956264] [2022-01-18 05:36:19,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:36:19,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:19,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:19,979 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) [2022-01-18 05:36:19,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 05:36:20,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:36:20,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:36:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:20,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:20,373 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 19 [2022-01-18 05:36:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:20,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:20,767 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:36:20,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:36:20,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:20,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:20,826 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 7 [2022-01-18 05:36:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:20,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608956264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:20,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:20,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-01-18 05:36:20,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101984363] [2022-01-18 05:36:20,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:20,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:36:20,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:36:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:36:20,874 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:23,970 INFO L93 Difference]: Finished difference Result 19190 states and 87841 transitions. [2022-01-18 05:36:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:36:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:24,031 INFO L225 Difference]: With dead ends: 19190 [2022-01-18 05:36:24,031 INFO L226 Difference]: Without dead ends: 19116 [2022-01-18 05:36:24,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=5150, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:36:24,032 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 750 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:24,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1399 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:36:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19116 states. [2022-01-18 05:36:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19116 to 16775. [2022-01-18 05:36:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.684571360438774) internal successors, (78579), 16774 states have internal predecessors, (78579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78579 transitions. [2022-01-18 05:36:24,483 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78579 transitions. Word has length 33 [2022-01-18 05:36:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:24,483 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78579 transitions. [2022-01-18 05:36:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78579 transitions. [2022-01-18 05:36:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:24,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:24,520 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, 1, 1, 1] [2022-01-18 05:36:24,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 05:36:24,720 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,SelfDestructingSolverStorable212 [2022-01-18 05:36:24,720 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1675540629, now seen corresponding path program 102 times [2022-01-18 05:36:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527230840] [2022-01-18 05:36:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:24,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:24,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527230840] [2022-01-18 05:36:24,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527230840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300537863] [2022-01-18 05:36:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:36:24,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:24,901 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) [2022-01-18 05:36:24,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 05:36:24,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:36:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:36:24,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:25,282 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:36:25,283 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 33 treesize of output 57 [2022-01-18 05:36:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:25,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:25,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300537863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:25,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:25,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 05:36:25,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490602443] [2022-01-18 05:36:25,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:25,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:36:25,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:36:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:36:25,791 INFO L87 Difference]: Start difference. First operand 16775 states and 78579 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:29,846 INFO L93 Difference]: Finished difference Result 19035 states and 87325 transitions. [2022-01-18 05:36:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 05:36:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:29,906 INFO L225 Difference]: With dead ends: 19035 [2022-01-18 05:36:29,906 INFO L226 Difference]: Without dead ends: 19007 [2022-01-18 05:36:29,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 05:36:29,907 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 978 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 5076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:29,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1515 Invalid, 5076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 05:36:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19007 states. [2022-01-18 05:36:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 16766. [2022-01-18 05:36:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16766 states, 16765 states have (on average 4.684938860721742) internal successors, (78543), 16765 states have internal predecessors, (78543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 78543 transitions. [2022-01-18 05:36:30,317 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 78543 transitions. Word has length 33 [2022-01-18 05:36:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:30,318 INFO L470 AbstractCegarLoop]: Abstraction has 16766 states and 78543 transitions. [2022-01-18 05:36:30,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 78543 transitions. [2022-01-18 05:36:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:30,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:30,354 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, 1, 1, 1] [2022-01-18 05:36:30,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 05:36:30,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 05:36:30,554 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1684677661, now seen corresponding path program 103 times [2022-01-18 05:36:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:30,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725319023] [2022-01-18 05:36:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:30,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:30,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:30,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725319023] [2022-01-18 05:36:30,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725319023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:30,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113352833] [2022-01-18 05:36:30,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:36:30,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:30,738 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) [2022-01-18 05:36:30,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 05:36:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:36:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,194 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 35 treesize of output 19 [2022-01-18 05:36:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:31,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:31,604 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:36:31,604 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 [2022-01-18 05:36:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,667 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 7 [2022-01-18 05:36:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113352833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:31,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:36:31,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198508319] [2022-01-18 05:36:31,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:31,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:36:31,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:36:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:36:31,715 INFO L87 Difference]: Start difference. First operand 16766 states and 78543 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:34,823 INFO L93 Difference]: Finished difference Result 18071 states and 83467 transitions. [2022-01-18 05:36:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:36:34,823 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:34,881 INFO L225 Difference]: With dead ends: 18071 [2022-01-18 05:36:34,881 INFO L226 Difference]: Without dead ends: 18036 [2022-01-18 05:36:34,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=398, Invalid=4714, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:36:34,882 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 517 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:34,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1512 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4589 Invalid, 0 Unknown, 268 Unchecked, 1.9s Time] [2022-01-18 05:36:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18036 states. [2022-01-18 05:36:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18036 to 16778. [2022-01-18 05:36:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16778 states, 16777 states have (on average 4.684508553376647) internal successors, (78592), 16777 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 78592 transitions. [2022-01-18 05:36:35,469 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 78592 transitions. Word has length 33 [2022-01-18 05:36:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:35,469 INFO L470 AbstractCegarLoop]: Abstraction has 16778 states and 78592 transitions. [2022-01-18 05:36:35,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 78592 transitions. [2022-01-18 05:36:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:35,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:35,505 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, 1, 1, 1] [2022-01-18 05:36:35,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 05:36:35,705 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,SelfDestructingSolverStorable214 [2022-01-18 05:36:35,706 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash 833944483, now seen corresponding path program 104 times [2022-01-18 05:36:35,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:35,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695958101] [2022-01-18 05:36:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:35,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:35,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:35,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695958101] [2022-01-18 05:36:35,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695958101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:35,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491555582] [2022-01-18 05:36:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:36:35,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:35,890 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) [2022-01-18 05:36:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 05:36:35,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:36:35,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:35,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 05:36:35,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:36,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:36,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:36,351 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 33 treesize of output 39 [2022-01-18 05:36:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:36,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:36,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:36,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:36:37,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:37,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:36:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:37,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491555582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:37,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:37,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:36:37,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644324652] [2022-01-18 05:36:37,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:37,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:36:37,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:36:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:36:37,059 INFO L87 Difference]: Start difference. First operand 16778 states and 78592 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:38,914 INFO L93 Difference]: Finished difference Result 17477 states and 81292 transitions. [2022-01-18 05:36:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:36:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:38,972 INFO L225 Difference]: With dead ends: 17477 [2022-01-18 05:36:38,972 INFO L226 Difference]: Without dead ends: 17465 [2022-01-18 05:36:38,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:36:38,973 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 570 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:38,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 867 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2383 Invalid, 0 Unknown, 277 Unchecked, 1.0s Time] [2022-01-18 05:36:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2022-01-18 05:36:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16810. [2022-01-18 05:36:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16810 states, 16809 states have (on average 4.68314593372598) internal successors, (78719), 16809 states have internal predecessors, (78719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 78719 transitions. [2022-01-18 05:36:39,344 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 78719 transitions. Word has length 33 [2022-01-18 05:36:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:39,344 INFO L470 AbstractCegarLoop]: Abstraction has 16810 states and 78719 transitions. [2022-01-18 05:36:39,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 78719 transitions. [2022-01-18 05:36:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:39,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:39,380 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, 1, 1, 1] [2022-01-18 05:36:39,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 05:36:39,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:39,581 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 637430978, now seen corresponding path program 3 times [2022-01-18 05:36:39,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35851390] [2022-01-18 05:36:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:39,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:39,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35851390] [2022-01-18 05:36:39,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35851390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190289821] [2022-01-18 05:36:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:39,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:39,771 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) [2022-01-18 05:36:39,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 05:36:39,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:36:39,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:36:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:40,215 INFO L353 Elim1Store]: treesize reduction 14, result has 74.5 percent of original size [2022-01-18 05:36:40,215 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 29 treesize of output 55 [2022-01-18 05:36:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:40,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190289821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:40,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:40,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 05:36:40,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322752648] [2022-01-18 05:36:40,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:40,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:36:40,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:36:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:36:40,846 INFO L87 Difference]: Start difference. First operand 16810 states and 78719 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:45,760 INFO L93 Difference]: Finished difference Result 19887 states and 90051 transitions. [2022-01-18 05:36:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 05:36:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:45,822 INFO L225 Difference]: With dead ends: 19887 [2022-01-18 05:36:45,822 INFO L226 Difference]: Without dead ends: 19858 [2022-01-18 05:36:45,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1000, Invalid=9920, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 05:36:45,824 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1111 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4855 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 4855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:45,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 1555 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4855 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 05:36:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19858 states. [2022-01-18 05:36:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19858 to 16910. [2022-01-18 05:36:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685906913478029) internal successors, (79234), 16909 states have internal predecessors, (79234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79234 transitions. [2022-01-18 05:36:46,284 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79234 transitions. Word has length 33 [2022-01-18 05:36:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79234 transitions. [2022-01-18 05:36:46,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79234 transitions. [2022-01-18 05:36:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:46,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:46,321 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, 1, 1, 1] [2022-01-18 05:36:46,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 05:36:46,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:46,522 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1300681963, now seen corresponding path program 105 times [2022-01-18 05:36:46,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:46,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910368256] [2022-01-18 05:36:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:46,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:46,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910368256] [2022-01-18 05:36:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910368256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061276007] [2022-01-18 05:36:46,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:46,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:46,701 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) [2022-01-18 05:36:46,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 05:36:46,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:36:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:36:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:47,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:47,207 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:36:47,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 05:36:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:47,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061276007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:47,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:47,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 05:36:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314092448] [2022-01-18 05:36:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:36:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:36:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:36:47,791 INFO L87 Difference]: Start difference. First operand 16910 states and 79234 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:52,837 INFO L93 Difference]: Finished difference Result 18729 states and 85992 transitions. [2022-01-18 05:36:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 05:36:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:52,896 INFO L225 Difference]: With dead ends: 18729 [2022-01-18 05:36:52,896 INFO L226 Difference]: Without dead ends: 18699 [2022-01-18 05:36:52,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=660, Invalid=8270, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:36:52,897 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 826 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 6257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1859 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 6257 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 05:36:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2022-01-18 05:36:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 16910. [2022-01-18 05:36:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685966053580933) internal successors, (79235), 16909 states have internal predecessors, (79235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79235 transitions. [2022-01-18 05:36:53,303 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79235 transitions. Word has length 33 [2022-01-18 05:36:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:53,303 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79235 transitions. [2022-01-18 05:36:53,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79235 transitions. [2022-01-18 05:36:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:53,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:53,340 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, 1, 1, 1] [2022-01-18 05:36:53,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:53,540 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,SelfDestructingSolverStorable217 [2022-01-18 05:36:53,540 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -382321509, now seen corresponding path program 106 times [2022-01-18 05:36:53,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125742165] [2022-01-18 05:36:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:53,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:53,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:53,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125742165] [2022-01-18 05:36:53,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125742165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:53,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216668542] [2022-01-18 05:36:53,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:53,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:53,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:53,719 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) [2022-01-18 05:36:53,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 05:36:53,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:36:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:54,091 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 31 treesize of output 15 [2022-01-18 05:36:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:54,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:54,463 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:36:54,463 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 27 treesize of output 48 [2022-01-18 05:36:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:54,527 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 27 treesize of output 7 [2022-01-18 05:36:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:54,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216668542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:54,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:54,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:36:54,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709563102] [2022-01-18 05:36:54,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:54,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:36:54,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:36:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:36:54,576 INFO L87 Difference]: Start difference. First operand 16910 states and 79235 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:58,048 INFO L93 Difference]: Finished difference Result 21206 states and 97010 transitions. [2022-01-18 05:36:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:36:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:36:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:58,116 INFO L225 Difference]: With dead ends: 21206 [2022-01-18 05:36:58,117 INFO L226 Difference]: Without dead ends: 21120 [2022-01-18 05:36:58,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:36:58,118 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 811 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 4854 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:58,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1512 Invalid, 4982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4854 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:36:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2022-01-18 05:36:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 17505. [2022-01-18 05:36:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17505 states, 17504 states have (on average 4.713722577696527) internal successors, (82509), 17504 states have internal predecessors, (82509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 82509 transitions. [2022-01-18 05:36:58,600 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 82509 transitions. Word has length 33 [2022-01-18 05:36:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 82509 transitions. [2022-01-18 05:36:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 82509 transitions. [2022-01-18 05:36:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:36:58,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:58,638 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, 1, 1, 1] [2022-01-18 05:36:58,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 05:36:58,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:58,839 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:36:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 920951097, now seen corresponding path program 107 times [2022-01-18 05:36:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:58,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698513906] [2022-01-18 05:36:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:58,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:59,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:59,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698513906] [2022-01-18 05:36:59,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698513906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:59,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639320250] [2022-01-18 05:36:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:36:59,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:59,027 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) [2022-01-18 05:36:59,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 05:36:59,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:36:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:36:59,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:59,407 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 33 treesize of output 17 [2022-01-18 05:36:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:59,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:59,768 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:36:59,768 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 [2022-01-18 05:36:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:59,837 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 7 [2022-01-18 05:36:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639320250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:59,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:59,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 05:36:59,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505482486] [2022-01-18 05:36:59,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:59,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:36:59,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:36:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:36:59,888 INFO L87 Difference]: Start difference. First operand 17505 states and 82509 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:02,715 INFO L93 Difference]: Finished difference Result 20890 states and 95605 transitions. [2022-01-18 05:37:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:37:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:02,777 INFO L225 Difference]: With dead ends: 20890 [2022-01-18 05:37:02,778 INFO L226 Difference]: Without dead ends: 20781 [2022-01-18 05:37:02,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=584, Invalid=4386, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:37:02,778 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 735 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:02,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 1250 Invalid, 3912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 05:37:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-01-18 05:37:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 17514. [2022-01-18 05:37:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17514 states, 17513 states have (on average 4.713812596356992) internal successors, (82553), 17513 states have internal predecessors, (82553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 82553 transitions. [2022-01-18 05:37:03,252 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 82553 transitions. Word has length 33 [2022-01-18 05:37:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:03,252 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 82553 transitions. [2022-01-18 05:37:03,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 82553 transitions. [2022-01-18 05:37:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:03,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:03,291 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, 1, 1, 1] [2022-01-18 05:37:03,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 05:37:03,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:03,495 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1364573623, now seen corresponding path program 108 times [2022-01-18 05:37:03,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:03,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376453277] [2022-01-18 05:37:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:03,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:03,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:03,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376453277] [2022-01-18 05:37:03,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376453277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823091508] [2022-01-18 05:37:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:03,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:03,683 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) [2022-01-18 05:37:03,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 05:37:03,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:37:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:03,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:04,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:04,065 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:37:04,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 55 [2022-01-18 05:37:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:04,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823091508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:04,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:04,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 05:37:04,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840646713] [2022-01-18 05:37:04,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:37:04,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:37:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:37:04,659 INFO L87 Difference]: Start difference. First operand 17514 states and 82553 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:09,727 INFO L93 Difference]: Finished difference Result 20733 states and 96159 transitions. [2022-01-18 05:37:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 05:37:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:09,794 INFO L225 Difference]: With dead ends: 20733 [2022-01-18 05:37:09,794 INFO L226 Difference]: Without dead ends: 20675 [2022-01-18 05:37:09,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=880, Invalid=9020, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 05:37:09,796 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1051 mSDsluCounter, 4399 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:09,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1864 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 05:37:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20675 states. [2022-01-18 05:37:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20675 to 17778. [2022-01-18 05:37:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17778 states, 17777 states have (on average 4.727850593463464) internal successors, (84047), 17777 states have internal predecessors, (84047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17778 states to 17778 states and 84047 transitions. [2022-01-18 05:37:10,348 INFO L78 Accepts]: Start accepts. Automaton has 17778 states and 84047 transitions. Word has length 33 [2022-01-18 05:37:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:10,348 INFO L470 AbstractCegarLoop]: Abstraction has 17778 states and 84047 transitions. [2022-01-18 05:37:10,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 17778 states and 84047 transitions. [2022-01-18 05:37:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:10,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:10,388 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, 1, 1, 1] [2022-01-18 05:37:10,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 05:37:10,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:10,588 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 710882143, now seen corresponding path program 109 times [2022-01-18 05:37:10,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:10,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194329271] [2022-01-18 05:37:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:10,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:10,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194329271] [2022-01-18 05:37:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194329271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24579009] [2022-01-18 05:37:10,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:37:10,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:10,770 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) [2022-01-18 05:37:10,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 05:37:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:11,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 05:37:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:11,623 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:37:11,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:37:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:11,687 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 7 [2022-01-18 05:37:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:11,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24579009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:11,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:11,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:37:11,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669653938] [2022-01-18 05:37:11,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:11,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:37:11,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:37:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:37:11,736 INFO L87 Difference]: Start difference. First operand 17778 states and 84047 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:15,833 INFO L93 Difference]: Finished difference Result 19986 states and 93007 transitions. [2022-01-18 05:37:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:37:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:15,898 INFO L225 Difference]: With dead ends: 19986 [2022-01-18 05:37:15,898 INFO L226 Difference]: Without dead ends: 19917 [2022-01-18 05:37:15,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=474, Invalid=5688, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 05:37:15,899 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 545 mSDsluCounter, 4795 mSDsCounter, 0 mSdLazyCounter, 6511 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 6608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:15,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2017 Invalid, 6608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6511 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 05:37:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19917 states. [2022-01-18 05:37:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19917 to 17834. [2022-01-18 05:37:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17834 states, 17833 states have (on average 4.734256715078787) internal successors, (84426), 17833 states have internal predecessors, (84426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 84426 transitions. [2022-01-18 05:37:16,314 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 84426 transitions. Word has length 33 [2022-01-18 05:37:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:16,314 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 84426 transitions. [2022-01-18 05:37:16,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 84426 transitions. [2022-01-18 05:37:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:16,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:16,353 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, 1, 1, 1] [2022-01-18 05:37:16,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 05:37:16,553 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,SelfDestructingSolverStorable221 [2022-01-18 05:37:16,553 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -464058405, now seen corresponding path program 110 times [2022-01-18 05:37:16,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:16,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561253303] [2022-01-18 05:37:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:16,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:16,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:16,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561253303] [2022-01-18 05:37:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561253303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:16,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761667482] [2022-01-18 05:37:16,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:16,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:16,756 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) [2022-01-18 05:37:16,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 05:37:16,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:16,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:17,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:17,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:37:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:17,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:18,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:18,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:37:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:18,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:37:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:18,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761667482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:18,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:18,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:37:18,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852582750] [2022-01-18 05:37:18,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:18,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:37:18,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:37:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:37:18,226 INFO L87 Difference]: Start difference. First operand 17834 states and 84426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:20,192 INFO L93 Difference]: Finished difference Result 18880 states and 88760 transitions. [2022-01-18 05:37:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:37:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:20,252 INFO L225 Difference]: With dead ends: 18880 [2022-01-18 05:37:20,253 INFO L226 Difference]: Without dead ends: 18873 [2022-01-18 05:37:20,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:37:20,253 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 510 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:20,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 790 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2228 Invalid, 0 Unknown, 437 Unchecked, 1.1s Time] [2022-01-18 05:37:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2022-01-18 05:37:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 17919. [2022-01-18 05:37:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17919 states, 17918 states have (on average 4.732671057037615) internal successors, (84800), 17918 states have internal predecessors, (84800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17919 states to 17919 states and 84800 transitions. [2022-01-18 05:37:20,657 INFO L78 Accepts]: Start accepts. Automaton has 17919 states and 84800 transitions. Word has length 33 [2022-01-18 05:37:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:20,657 INFO L470 AbstractCegarLoop]: Abstraction has 17919 states and 84800 transitions. [2022-01-18 05:37:20,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17919 states and 84800 transitions. [2022-01-18 05:37:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:20,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:20,696 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, 1, 1, 1] [2022-01-18 05:37:20,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 05:37:20,896 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,SelfDestructingSolverStorable222 [2022-01-18 05:37:20,897 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 902108661, now seen corresponding path program 111 times [2022-01-18 05:37:20,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703552678] [2022-01-18 05:37:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:20,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:21,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703552678] [2022-01-18 05:37:21,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703552678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138971016] [2022-01-18 05:37:21,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:37:21,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:21,086 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) [2022-01-18 05:37:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 05:37:21,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:37:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 05:37:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:21,414 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:37:21,414 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 05:37:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:21,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138971016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:22,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:22,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 05:37:22,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707187800] [2022-01-18 05:37:22,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:22,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:37:22,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:37:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:37:22,024 INFO L87 Difference]: Start difference. First operand 17919 states and 84800 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:27,064 INFO L93 Difference]: Finished difference Result 22258 states and 102848 transitions. [2022-01-18 05:37:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:37:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:27,137 INFO L225 Difference]: With dead ends: 22258 [2022-01-18 05:37:27,137 INFO L226 Difference]: Without dead ends: 22188 [2022-01-18 05:37:27,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1041, Invalid=8271, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 05:37:27,138 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1104 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 5163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:27,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1523 Invalid, 5411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 5163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 05:37:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22188 states. [2022-01-18 05:37:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22188 to 18428. [2022-01-18 05:37:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 4.755521788679655) internal successors, (87630), 18427 states have internal predecessors, (87630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 87630 transitions. [2022-01-18 05:37:27,843 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 87630 transitions. Word has length 33 [2022-01-18 05:37:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:27,843 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 87630 transitions. [2022-01-18 05:37:27,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 87630 transitions. [2022-01-18 05:37:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:27,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:27,883 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, 1, 1, 1] [2022-01-18 05:37:27,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 05:37:28,083 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,SelfDestructingSolverStorable223 [2022-01-18 05:37:28,083 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 839214201, now seen corresponding path program 112 times [2022-01-18 05:37:28,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990793682] [2022-01-18 05:37:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:28,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:28,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:28,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990793682] [2022-01-18 05:37:28,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990793682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:28,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673845081] [2022-01-18 05:37:28,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:37:28,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:28,269 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) [2022-01-18 05:37:28,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 05:37:28,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:37:28,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:28,592 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 37 treesize of output 21 [2022-01-18 05:37:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:28,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:28,985 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:37:28,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:37:29,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,038 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 7 [2022-01-18 05:37:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:29,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673845081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:29,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:29,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:37:29,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513328266] [2022-01-18 05:37:29,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:29,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:37:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:37:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:37:29,086 INFO L87 Difference]: Start difference. First operand 18428 states and 87630 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:32,107 INFO L93 Difference]: Finished difference Result 21691 states and 100577 transitions. [2022-01-18 05:37:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:37:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:32,178 INFO L225 Difference]: With dead ends: 21691 [2022-01-18 05:37:32,179 INFO L226 Difference]: Without dead ends: 21601 [2022-01-18 05:37:32,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=589, Invalid=4241, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:37:32,180 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 756 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:32,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1490 Invalid, 4698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 05:37:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21601 states. [2022-01-18 05:37:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21601 to 18843. [2022-01-18 05:37:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 4.760375756289141) internal successors, (89695), 18842 states have internal predecessors, (89695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 89695 transitions. [2022-01-18 05:37:32,679 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 89695 transitions. Word has length 33 [2022-01-18 05:37:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:32,679 INFO L470 AbstractCegarLoop]: Abstraction has 18843 states and 89695 transitions. [2022-01-18 05:37:32,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 89695 transitions. [2022-01-18 05:37:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:32,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:32,720 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, 1, 1, 1] [2022-01-18 05:37:32,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 05:37:32,921 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,SelfDestructingSolverStorable224 [2022-01-18 05:37:32,921 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash 785827681, now seen corresponding path program 113 times [2022-01-18 05:37:32,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:32,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145099097] [2022-01-18 05:37:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:32,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:33,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145099097] [2022-01-18 05:37:33,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145099097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221864239] [2022-01-18 05:37:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:37:33,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:33,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:33,111 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) [2022-01-18 05:37:33,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 05:37:33,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:37:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 05:37:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:33,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:33,456 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 21 [2022-01-18 05:37:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:33,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:34,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:34,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:34,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 48 [2022-01-18 05:37:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:34,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2022-01-18 05:37:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:34,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221864239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:34,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:34,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 05:37:34,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234491556] [2022-01-18 05:37:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:34,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:37:34,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:37:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:37:34,166 INFO L87 Difference]: Start difference. First operand 18843 states and 89695 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:39,709 INFO L93 Difference]: Finished difference Result 23929 states and 110222 transitions. [2022-01-18 05:37:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 05:37:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:39,788 INFO L225 Difference]: With dead ends: 23929 [2022-01-18 05:37:39,788 INFO L226 Difference]: Without dead ends: 23916 [2022-01-18 05:37:39,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1480, Invalid=9232, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 05:37:39,790 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1022 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:39,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1915 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 5420 Invalid, 0 Unknown, 940 Unchecked, 2.5s Time] [2022-01-18 05:37:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2022-01-18 05:37:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 19280. [2022-01-18 05:37:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19280 states, 19279 states have (on average 4.756678250946626) internal successors, (91704), 19279 states have internal predecessors, (91704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 91704 transitions. [2022-01-18 05:37:40,323 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 91704 transitions. Word has length 33 [2022-01-18 05:37:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:40,323 INFO L470 AbstractCegarLoop]: Abstraction has 19280 states and 91704 transitions. [2022-01-18 05:37:40,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 91704 transitions. [2022-01-18 05:37:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:40,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:40,460 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, 1, 1, 1] [2022-01-18 05:37:40,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:40,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:40,661 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:40,662 INFO L85 PathProgramCache]: Analyzing trace with hash -376619487, now seen corresponding path program 114 times [2022-01-18 05:37:40,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:40,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930415922] [2022-01-18 05:37:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:40,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:40,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930415922] [2022-01-18 05:37:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930415922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024735044] [2022-01-18 05:37:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:40,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:40,846 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) [2022-01-18 05:37:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 05:37:40,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:37:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:41,171 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 05:37:41,171 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 05:37:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:41,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024735044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:41,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:41,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 05:37:41,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710595133] [2022-01-18 05:37:41,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:41,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:37:41,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:37:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:37:41,735 INFO L87 Difference]: Start difference. First operand 19280 states and 91704 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:46,482 INFO L93 Difference]: Finished difference Result 22563 states and 104578 transitions. [2022-01-18 05:37:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 05:37:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:46,555 INFO L225 Difference]: With dead ends: 22563 [2022-01-18 05:37:46,555 INFO L226 Difference]: Without dead ends: 22483 [2022-01-18 05:37:46,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1108, Invalid=7822, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:37:46,556 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1072 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 5530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:46,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1653 Invalid, 5530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 05:37:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22483 states. [2022-01-18 05:37:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22483 to 19163. [2022-01-18 05:37:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19163 states, 19162 states have (on average 4.757697526354243) internal successors, (91167), 19162 states have internal predecessors, (91167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19163 states to 19163 states and 91167 transitions. [2022-01-18 05:37:47,063 INFO L78 Accepts]: Start accepts. Automaton has 19163 states and 91167 transitions. Word has length 33 [2022-01-18 05:37:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:47,063 INFO L470 AbstractCegarLoop]: Abstraction has 19163 states and 91167 transitions. [2022-01-18 05:37:47,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 19163 states and 91167 transitions. [2022-01-18 05:37:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:47,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:47,106 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, 1, 1, 1] [2022-01-18 05:37:47,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 05:37:47,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-01-18 05:37:47,306 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:47,306 INFO L85 PathProgramCache]: Analyzing trace with hash 55173915, now seen corresponding path program 115 times [2022-01-18 05:37:47,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:47,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801005026] [2022-01-18 05:37:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:47,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:47,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801005026] [2022-01-18 05:37:47,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801005026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133108092] [2022-01-18 05:37:47,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:37:47,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:47,505 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) [2022-01-18 05:37:47,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 05:37:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:47,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:47,855 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 35 treesize of output 19 [2022-01-18 05:37:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:47,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:48,291 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:37:48,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:37:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:48,359 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 7 [2022-01-18 05:37:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133108092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:48,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:48,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:37:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657422523] [2022-01-18 05:37:48,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:48,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:37:48,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:37:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:37:48,409 INFO L87 Difference]: Start difference. First operand 19163 states and 91167 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:51,506 INFO L93 Difference]: Finished difference Result 20991 states and 98389 transitions. [2022-01-18 05:37:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:37:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:37:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:51,575 INFO L225 Difference]: With dead ends: 20991 [2022-01-18 05:37:51,575 INFO L226 Difference]: Without dead ends: 20979 [2022-01-18 05:37:51,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=489, Invalid=4481, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:37:51,576 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 588 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:51,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1335 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3877 Invalid, 0 Unknown, 207 Unchecked, 1.6s Time] [2022-01-18 05:37:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2022-01-18 05:37:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 19312. [2022-01-18 05:37:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19312 states, 19311 states have (on average 4.750763813370618) internal successors, (91742), 19311 states have internal predecessors, (91742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19312 states to 19312 states and 91742 transitions. [2022-01-18 05:37:52,037 INFO L78 Accepts]: Start accepts. Automaton has 19312 states and 91742 transitions. Word has length 33 [2022-01-18 05:37:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 19312 states and 91742 transitions. [2022-01-18 05:37:52,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19312 states and 91742 transitions. [2022-01-18 05:37:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:52,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:52,079 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, 1, 1, 1] [2022-01-18 05:37:52,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 05:37:52,280 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,SelfDestructingSolverStorable227 [2022-01-18 05:37:52,280 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2063118535, now seen corresponding path program 116 times [2022-01-18 05:37:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718657843] [2022-01-18 05:37:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:52,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:52,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718657843] [2022-01-18 05:37:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718657843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775865829] [2022-01-18 05:37:52,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:52,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:52,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:52,473 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) [2022-01-18 05:37:52,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 05:37:52,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:52,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:52,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:52,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:37:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:53,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:53,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:37:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:53,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:37:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:53,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775865829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:53,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:53,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:37:53,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681298814] [2022-01-18 05:37:53,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:53,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:37:53,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:37:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:37:53,682 INFO L87 Difference]: Start difference. First operand 19312 states and 91742 transitions. Second operand has 32 states, 32 states have (on average 2.21875) 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) [2022-01-18 05:37:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:56,608 INFO L93 Difference]: Finished difference Result 20328 states and 96004 transitions. [2022-01-18 05:37:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 05:37:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) 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 33 [2022-01-18 05:37:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:56,674 INFO L225 Difference]: With dead ends: 20328 [2022-01-18 05:37:56,674 INFO L226 Difference]: Without dead ends: 20317 [2022-01-18 05:37:56,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:37:56,675 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 464 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:56,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1028 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2867 Invalid, 0 Unknown, 230 Unchecked, 1.3s Time] [2022-01-18 05:37:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2022-01-18 05:37:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 19337. [2022-01-18 05:37:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 4.748810508895325) internal successors, (91823), 19336 states have internal predecessors, (91823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 91823 transitions. [2022-01-18 05:37:57,117 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 91823 transitions. Word has length 33 [2022-01-18 05:37:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:57,117 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 91823 transitions. [2022-01-18 05:37:57,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) 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) [2022-01-18 05:37:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 91823 transitions. [2022-01-18 05:37:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:37:57,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:57,159 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, 1, 1, 1] [2022-01-18 05:37:57,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:57,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:57,360 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:37:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -320308200, now seen corresponding path program 16 times [2022-01-18 05:37:57,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:57,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029340032] [2022-01-18 05:37:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:57,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:57,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:57,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029340032] [2022-01-18 05:37:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029340032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654815408] [2022-01-18 05:37:57,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:37:57,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:57,566 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) [2022-01-18 05:37:57,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 05:37:57,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:37:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:37:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:57,918 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 37 treesize of output 21 [2022-01-18 05:37:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:58,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:58,359 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:37:58,359 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 [2022-01-18 05:37:58,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,422 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 7 [2022-01-18 05:37:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:58,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654815408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:58,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:58,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:37:58,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138607342] [2022-01-18 05:37:58,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:37:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:37:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:37:58,474 INFO L87 Difference]: Start difference. First operand 19337 states and 91823 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:01,873 INFO L93 Difference]: Finished difference Result 21020 states and 98464 transitions. [2022-01-18 05:38:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:38:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:38:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:01,941 INFO L225 Difference]: With dead ends: 21020 [2022-01-18 05:38:01,942 INFO L226 Difference]: Without dead ends: 20923 [2022-01-18 05:38:01,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=495, Invalid=4617, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:38:01,942 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 567 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:01,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1559 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 05:38:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20923 states. [2022-01-18 05:38:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20923 to 19241. [2022-01-18 05:38:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19241 states, 19240 states have (on average 4.757068607068607) internal successors, (91526), 19240 states have internal predecessors, (91526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19241 states to 19241 states and 91526 transitions. [2022-01-18 05:38:02,407 INFO L78 Accepts]: Start accepts. Automaton has 19241 states and 91526 transitions. Word has length 33 [2022-01-18 05:38:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:02,407 INFO L470 AbstractCegarLoop]: Abstraction has 19241 states and 91526 transitions. [2022-01-18 05:38:02,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19241 states and 91526 transitions. [2022-01-18 05:38:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:38:02,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:02,449 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, 1, 1, 1] [2022-01-18 05:38:02,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 05:38:02,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:02,650 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:38:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -508423509, now seen corresponding path program 117 times [2022-01-18 05:38:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037609815] [2022-01-18 05:38:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:02,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:02,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037609815] [2022-01-18 05:38:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037609815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305264991] [2022-01-18 05:38:02,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:38:02,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:02,848 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) [2022-01-18 05:38:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 05:38:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:38:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:38:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:03,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:03,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 05:38:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:03,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:04,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:04,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 22 [2022-01-18 05:38:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:04,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 treesize of output 7 [2022-01-18 05:38:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305264991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:04,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:04,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:38:04,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732777176] [2022-01-18 05:38:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:04,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:38:04,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:38:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:38:04,146 INFO L87 Difference]: Start difference. First operand 19241 states and 91526 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:05,985 INFO L93 Difference]: Finished difference Result 19870 states and 93984 transitions. [2022-01-18 05:38:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:38:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:38:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:06,051 INFO L225 Difference]: With dead ends: 19870 [2022-01-18 05:38:06,051 INFO L226 Difference]: Without dead ends: 19859 [2022-01-18 05:38:06,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:38:06,052 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 463 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:06,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 856 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2368 Invalid, 0 Unknown, 460 Unchecked, 1.0s Time] [2022-01-18 05:38:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19859 states. [2022-01-18 05:38:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19859 to 19257. [2022-01-18 05:38:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19257 states, 19256 states have (on average 4.755972164520149) internal successors, (91581), 19256 states have internal predecessors, (91581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19257 states to 19257 states and 91581 transitions. [2022-01-18 05:38:06,738 INFO L78 Accepts]: Start accepts. Automaton has 19257 states and 91581 transitions. Word has length 33 [2022-01-18 05:38:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:06,739 INFO L470 AbstractCegarLoop]: Abstraction has 19257 states and 91581 transitions. [2022-01-18 05:38:06,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 19257 states and 91581 transitions. [2022-01-18 05:38:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:38:06,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:06,781 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, 1, 1, 1] [2022-01-18 05:38:06,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 05:38:06,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:06,982 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:38:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash 379080172, now seen corresponding path program 17 times [2022-01-18 05:38:06,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112774927] [2022-01-18 05:38:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:06,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:07,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:07,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112774927] [2022-01-18 05:38:07,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112774927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:07,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521015867] [2022-01-18 05:38:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:07,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:07,178 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) [2022-01-18 05:38:07,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 05:38:07,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:38:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:07,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:07,934 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:38:07,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:38:07,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,995 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 7 [2022-01-18 05:38:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521015867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:08,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:08,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 05:38:08,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654143648] [2022-01-18 05:38:08,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:38:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:38:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:38:08,044 INFO L87 Difference]: Start difference. First operand 19257 states and 91581 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:11,234 INFO L93 Difference]: Finished difference Result 21990 states and 102172 transitions. [2022-01-18 05:38:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:38:11,234 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:38:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:11,307 INFO L225 Difference]: With dead ends: 21990 [2022-01-18 05:38:11,307 INFO L226 Difference]: Without dead ends: 21866 [2022-01-18 05:38:11,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=618, Invalid=5234, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:38:11,308 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 785 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 4741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:11,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1486 Invalid, 4741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4205 Invalid, 0 Unknown, 391 Unchecked, 1.8s Time] [2022-01-18 05:38:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21866 states. [2022-01-18 05:38:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21866 to 19015. [2022-01-18 05:38:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19015 states, 19014 states have (on average 4.761333754075944) internal successors, (90532), 19014 states have internal predecessors, (90532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19015 states to 19015 states and 90532 transitions. [2022-01-18 05:38:11,968 INFO L78 Accepts]: Start accepts. Automaton has 19015 states and 90532 transitions. Word has length 33 [2022-01-18 05:38:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:11,968 INFO L470 AbstractCegarLoop]: Abstraction has 19015 states and 90532 transitions. [2022-01-18 05:38:11,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 19015 states and 90532 transitions. [2022-01-18 05:38:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:38:12,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:12,009 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, 1, 1, 1] [2022-01-18 05:38:12,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 05:38:12,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:12,210 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 05:38:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash -945888303, now seen corresponding path program 118 times [2022-01-18 05:38:12,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:12,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487887594] [2022-01-18 05:38:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:12,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:12,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487887594] [2022-01-18 05:38:12,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487887594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433390670] [2022-01-18 05:38:12,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:38:12,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:12,400 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) [2022-01-18 05:38:12,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 05:38:12,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:38:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:38:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:12,749 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 37 treesize of output 21 [2022-01-18 05:38:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:12,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:13,138 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 05:38:13,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 05:38:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:13,201 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 7 [2022-01-18 05:38:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433390670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:13,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:13,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 05:38:13,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132250546] [2022-01-18 05:38:13,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:38:13,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:38:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:38:13,250 INFO L87 Difference]: Start difference. First operand 19015 states and 90532 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 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... [2022-01-18 05:38:15,062 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 [2022-01-18 05:38:15,062 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:38:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:38:15,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=2733, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:38:15,063 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 396 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:15,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 765 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2662 Invalid, 0 Unknown, 98 Unchecked, 1.2s Time] [2022-01-18 05:38:15,063 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-01-18 05:38:15,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 05:38:15,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:15,265 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (9 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6INUSE_VIOLATION (8 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (7 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION (6 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err8INUSE_VIOLATION (4 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err3INUSE_VIOLATION (3 of 11 remaining) [2022-01-18 05:38:15,266 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err5INUSE_VIOLATION (2 of 11 remaining) [2022-01-18 05:38:15,267 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err1INUSE_VIOLATION (1 of 11 remaining) [2022-01-18 05:38:15,267 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err9INUSE_VIOLATION (0 of 11 remaining) [2022-01-18 05:38:15,268 INFO L732 BasicCegarLoop]: Path program histogram: [118, 30, 29, 28, 17, 3, 2, 2, 2, 1, 1] [2022-01-18 05:38:15,271 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:38:15,271 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:38:15,272 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:38:15 BasicIcfg [2022-01-18 05:38:15,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:38:15,272 INFO L158 Benchmark]: Toolchain (without parser) took 735352.49ms. Allocated memory was 385.9MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 347.5MB in the beginning and 2.4GB in the end (delta: -2.0GB). Peak memory consumption was 439.5MB. Max. memory is 16.0GB. [2022-01-18 05:38:15,272 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 385.9MB. Free memory was 348.8MB in the beginning and 348.7MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:38:15,272 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.36ms. Allocated memory is still 385.9MB. Free memory was 347.4MB in the beginning and 345.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 05:38:15,273 INFO L158 Benchmark]: Boogie Preprocessor took 29.27ms. Allocated memory is still 385.9MB. Free memory was 345.9MB in the beginning and 344.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:38:15,273 INFO L158 Benchmark]: RCFGBuilder took 291.12ms. Allocated memory is still 385.9MB. Free memory was 344.8MB in the beginning and 333.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 05:38:15,273 INFO L158 Benchmark]: TraceAbstraction took 735000.68ms. Allocated memory was 385.9MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 332.6MB in the beginning and 2.4GB in the end (delta: -2.0GB). Peak memory consumption was 422.7MB. Max. memory is 16.0GB. [2022-01-18 05:38:15,273 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 0.13ms. Allocated memory is still 385.9MB. Free memory was 348.8MB in the beginning and 348.7MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.36ms. Allocated memory is still 385.9MB. Free memory was 347.4MB in the beginning and 345.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.27ms. Allocated memory is still 385.9MB. Free memory was 345.9MB in the beginning and 344.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 291.12ms. Allocated memory is still 385.9MB. Free memory was 344.8MB in the beginning and 333.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 735000.68ms. Allocated memory was 385.9MB in the beginning and 2.8GB in the end (delta: 2.5GB). Free memory was 332.6MB in the beginning and 2.4GB in the end (delta: -2.0GB). Peak memory consumption was 422.7MB. Max. memory is 16.0GB. * 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: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 50]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 53]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 90]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 50]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 53]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 90]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: 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 (19015states) and FLOYD_HOARE automaton (currently 39 states, 32 states before enhancement),while ReachableStatesComputation was computing reachable states (2179 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 734.8s, OverallIterations: 233, TraceHistogramMax: 2, PathProgramHistogramMax: 118, EmptinessCheckTime: 3.7s, AutomataDifference: 439.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118708 SdHoareTripleChecker+Valid, 241.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 118708 mSDsluCounter, 184432 SdHoareTripleChecker+Invalid, 200.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17291 IncrementalHoareTripleChecker+Unchecked, 455067 mSDsCounter, 18107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 584187 IncrementalHoareTripleChecker+Invalid, 619585 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18107 mSolverCounterUnsat, 11706 mSDtfsCounter, 584187 mSolverCounterSat, 1.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21987 GetRequests, 10238 SyntacticMatches, 809 SemanticMatches, 10940 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185884 ImplicationChecksByTransitivity, 250.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19337occurred in iteration=229, InterpolantAutomatonStates: 8505, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 41.2s AutomataMinimizationTime, 232 MinimizatonAttempts, 280285 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 193.7s InterpolantComputationTime, 14207 NumberOfCodeBlocks, 14207 NumberOfCodeBlocksAsserted, 726 NumberOfCheckSat, 20556 ConstructedInterpolants, 265 QuantifiedInterpolants, 371366 SizeOfPredicates, 2999 NumberOfNonLiveVariables, 30675 ConjunctsInSsa, 7627 ConjunctsInUnsatCore, 689 InterpolantComputations, 5 PerfectInterpolantSequences, 76/3294 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