/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:55:32,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:55:32,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:55:32,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 15:55:32,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 15:55:32,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 15:55:32,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 15:55:32,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 15:55:32,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 15:55:32,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 15:55:32,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 15:55:32,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 15:55:32,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 15:55:32,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 15:55:32,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 15:55:32,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 15:55:32,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 15:55:32,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 15:55:32,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 15:55:32,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 15:55:32,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 15:55:33,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 15:55:33,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 15:55:33,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 15:55:33,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 15:55:33,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 15:55:33,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 15:55:33,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 15:55:33,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 15:55:33,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 15:55:33,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 15:55:33,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 15:55:33,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 15:55:33,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 15:55:33,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 15:55:33,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 15:55:33,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 15:55:33,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 15:55:33,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 15:55:33,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 15:55:33,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 15:55:33,017 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-Separate.epf [2022-01-18 15:55:33,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:55:33,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:55:33,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:55:33,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:55:33,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:55:33,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:55:33,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:55:33,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:55:33,048 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:55:33,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:55:33,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:55:33,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:55:33,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:55:33,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:55:33,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:55:33,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:55:33,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:55:33,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:55:33,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:55:33,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:55:33,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:55:33,053 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:55:33,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:55:33,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:55:33,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:55:33,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:55:33,301 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:55:33,307 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:55:33,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2022-01-18 15:55:33,309 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2022-01-18 15:55:33,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:55:33,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:55:33,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:55:33,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:55:33,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:55:33,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,354 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:55:33,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:55:33,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:55:33,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:55:33,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:55:33,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:55:33,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:55:33,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:55:33,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:55:33,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/1) ... [2022-01-18 15:55:33,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:55:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:33,395 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 15:55:33,420 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 15:55:33,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:55:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:55:33,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:55:33,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:55:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:55:33,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:55:33,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:55:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:55:33,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:55:33,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:55:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:55:33,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:55:33,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 15:55:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 15:55:33,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 15:55:33,435 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 15:55:33,471 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:55:33,472 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:55:33,547 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:55:33,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:55:33,565 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 15:55:33,567 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:55:33 BoogieIcfgContainer [2022-01-18 15:55:33,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:55:33,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:55:33,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:55:33,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:55:33,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:55:33" (1/2) ... [2022-01-18 15:55:33,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a394ed5 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:55:33, skipping insertion in model container [2022-01-18 15:55:33,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:55:33" (2/2) ... [2022-01-18 15:55:33,591 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2022-01-18 15:55:33,594 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:55:33,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:55:33,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:55:33,595 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:55:33,658 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 15:55:33,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:55:33,711 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 15:55:33,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 15:55:33,720 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2022-01-18 15:55:33,794 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 15:55:33,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:33,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:33,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1717712671, now seen corresponding path program 1 times [2022-01-18 15:55:33,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559948141] [2022-01-18 15:55:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:34,020 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 15:55:34,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559948141] [2022-01-18 15:55:34,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559948141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:34,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:55:34,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994412393] [2022-01-18 15:55:34,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:34,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:55:34,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:55:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:55:34,050 INFO L87 Difference]: Start difference. First operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.25) 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 15:55:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:34,144 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2022-01-18 15:55:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:55:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) 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 15:55:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:34,211 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 15:55:34,211 INFO L226 Difference]: Without dead ends: 1056 [2022-01-18 15:55:34,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:55:34,221 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:34,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:55:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-18 15:55:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2022-01-18 15:55:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2022-01-18 15:55:34,325 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2022-01-18 15:55:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:34,326 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2022-01-18 15:55:34,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) 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 15:55:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2022-01-18 15:55:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:34,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:34,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 15:55:34,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:55:34,332 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -389763933, now seen corresponding path program 1 times [2022-01-18 15:55:34,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:34,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141509491] [2022-01-18 15:55:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:34,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:34,429 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 15:55:34,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141509491] [2022-01-18 15:55:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141509491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:34,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:34,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:55:34,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425160241] [2022-01-18 15:55:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:34,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:55:34,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:55:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:55:34,433 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:34,671 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2022-01-18 15:55:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:55:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:34,682 INFO L225 Difference]: With dead ends: 1405 [2022-01-18 15:55:34,683 INFO L226 Difference]: Without dead ends: 1369 [2022-01-18 15:55:34,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:55:34,685 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:34,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:55:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-01-18 15:55:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2022-01-18 15:55:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2022-01-18 15:55:34,751 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2022-01-18 15:55:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:34,752 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2022-01-18 15:55:34,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2022-01-18 15:55:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:34,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:34,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 15:55:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:55:34,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1011514275, now seen corresponding path program 1 times [2022-01-18 15:55:34,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684200288] [2022-01-18 15:55:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:34,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:34,874 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 15:55:34,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684200288] [2022-01-18 15:55:34,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684200288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:34,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:34,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:55:34,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671269940] [2022-01-18 15:55:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:34,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:55:34,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:55:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:55:34,886 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:55:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:35,052 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2022-01-18 15:55:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:55:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:55:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:35,060 INFO L225 Difference]: With dead ends: 1359 [2022-01-18 15:55:35,061 INFO L226 Difference]: Without dead ends: 1327 [2022-01-18 15:55:35,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:55:35,066 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:35,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 63 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-01-18 15:55:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2022-01-18 15:55:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2022-01-18 15:55:35,102 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2022-01-18 15:55:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:35,103 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2022-01-18 15:55:35,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:55:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2022-01-18 15:55:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:35,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:35,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:55:35,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2122504637, now seen corresponding path program 2 times [2022-01-18 15:55:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847562580] [2022-01-18 15:55:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:35,180 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 15:55:35,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:35,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847562580] [2022-01-18 15:55:35,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847562580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:35,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:35,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:55:35,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681128512] [2022-01-18 15:55:35,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:35,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:55:35,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:55:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:55:35,182 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:35,296 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2022-01-18 15:55:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:55:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:35,304 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 15:55:35,304 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 15:55:35,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:55:35,311 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:35,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 15:55:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2022-01-18 15:55:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2022-01-18 15:55:35,340 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2022-01-18 15:55:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:35,341 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2022-01-18 15:55:35,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:55:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2022-01-18 15:55:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:35,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:35,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:35,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:55:35,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1405271609, now seen corresponding path program 2 times [2022-01-18 15:55:35,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755882193] [2022-01-18 15:55:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:35,399 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 15:55:35,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755882193] [2022-01-18 15:55:35,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755882193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:35,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:35,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:55:35,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631099454] [2022-01-18 15:55:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:35,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:55:35,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:55:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:55:35,403 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:55:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:35,484 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2022-01-18 15:55:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:55:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:55:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:35,493 INFO L225 Difference]: With dead ends: 1296 [2022-01-18 15:55:35,494 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 15:55:35,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:55:35,497 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:35,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:55:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 15:55:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2022-01-18 15:55:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2022-01-18 15:55:35,533 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2022-01-18 15:55:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:35,534 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2022-01-18 15:55:35,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:55:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2022-01-18 15:55:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:35,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:35,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:35,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:55:35,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 909052359, now seen corresponding path program 3 times [2022-01-18 15:55:35,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610699103] [2022-01-18 15:55:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:35,608 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 15:55:35,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:35,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610699103] [2022-01-18 15:55:35,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610699103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:35,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:35,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:55:35,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320011902] [2022-01-18 15:55:35,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:35,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:55:35,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:55:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:55:35,610 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:35,738 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2022-01-18 15:55:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:55:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:35,750 INFO L225 Difference]: With dead ends: 1772 [2022-01-18 15:55:35,750 INFO L226 Difference]: Without dead ends: 1752 [2022-01-18 15:55:35,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:55:35,751 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:35,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 61 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-01-18 15:55:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2022-01-18 15:55:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2022-01-18 15:55:35,792 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2022-01-18 15:55:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:35,792 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2022-01-18 15:55:35,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2022-01-18 15:55:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:55:35,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:35,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 15:55:35,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 15:55:35,796 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -669560377, now seen corresponding path program 4 times [2022-01-18 15:55:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934074393] [2022-01-18 15:55:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:35,843 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 15:55:35,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934074393] [2022-01-18 15:55:35,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934074393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:35,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:35,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:55:35,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131461777] [2022-01-18 15:55:35,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:35,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:55:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:55:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:55:35,845 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:35,934 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2022-01-18 15:55:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:55:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:35,942 INFO L225 Difference]: With dead ends: 1137 [2022-01-18 15:55:35,942 INFO L226 Difference]: Without dead ends: 1137 [2022-01-18 15:55:35,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:55:35,943 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:35,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 40 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-01-18 15:55:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2022-01-18 15:55:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2022-01-18 15:55:35,977 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2022-01-18 15:55:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:35,977 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2022-01-18 15:55:35,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:55:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2022-01-18 15:55:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:55:35,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:35,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 15:55:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:55:35,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 167752897, now seen corresponding path program 1 times [2022-01-18 15:55:35,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314041857] [2022-01-18 15:55:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:36,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314041857] [2022-01-18 15:55:36,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314041857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262509730] [2022-01-18 15:55:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:36,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:36,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:36,031 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 15:55:36,048 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 15:55:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 15:55:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:36,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:36,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262509730] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:36,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 15:55:36,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2022-01-18 15:55:36,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758347560] [2022-01-18 15:55:36,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:36,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:55:36,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:36,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:55:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:55:36,334 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:36,465 INFO L93 Difference]: Finished difference Result 1587 states and 5894 transitions. [2022-01-18 15:55:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:55:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 15:55:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:36,475 INFO L225 Difference]: With dead ends: 1587 [2022-01-18 15:55:36,475 INFO L226 Difference]: Without dead ends: 1587 [2022-01-18 15:55:36,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:55:36,476 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:36,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-01-18 15:55:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1027. [2022-01-18 15:55:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2022-01-18 15:55:36,515 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2022-01-18 15:55:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:36,516 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2022-01-18 15:55:36,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2022-01-18 15:55:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:55:36,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:36,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 15:55:36,545 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 15:55:36,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:36,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1812385345, now seen corresponding path program 2 times [2022-01-18 15:55:36,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:36,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570511365] [2022-01-18 15:55:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:36,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:36,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570511365] [2022-01-18 15:55:36,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570511365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:36,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:36,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:55:36,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629604460] [2022-01-18 15:55:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:36,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:55:36,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:55:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:55:36,781 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:36,866 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2022-01-18 15:55:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:55:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 15:55:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:36,874 INFO L225 Difference]: With dead ends: 1113 [2022-01-18 15:55:36,874 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 15:55:36,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:55:36,876 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:36,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 15:55:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2022-01-18 15:55:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2022-01-18 15:55:36,906 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2022-01-18 15:55:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:36,907 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2022-01-18 15:55:36,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2022-01-18 15:55:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:55:36,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:36,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:36,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 15:55:36,912 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1458704197, now seen corresponding path program 1 times [2022-01-18 15:55:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812801130] [2022-01-18 15:55:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:36,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:36,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812801130] [2022-01-18 15:55:36,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812801130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487257414] [2022-01-18 15:55:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:36,950 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 15:55:36,962 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 15:55:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:55:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:37,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487257414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:37,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:37,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:55:37,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645066729] [2022-01-18 15:55:37,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:37,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:55:37,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:55:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:55:37,170 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 15:55:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:37,278 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2022-01-18 15:55:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:55:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 31 [2022-01-18 15:55:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:37,302 INFO L225 Difference]: With dead ends: 1404 [2022-01-18 15:55:37,302 INFO L226 Difference]: Without dead ends: 1404 [2022-01-18 15:55:37,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:55:37,303 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:37,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 110 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-01-18 15:55:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2022-01-18 15:55:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2022-01-18 15:55:37,338 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2022-01-18 15:55:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2022-01-18 15:55:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 15:55:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2022-01-18 15:55:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:55:37,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:37,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:37,371 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 15:55:37,559 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,SelfDestructingSolverStorable9 [2022-01-18 15:55:37,560 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1797271549, now seen corresponding path program 2 times [2022-01-18 15:55:37,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866503226] [2022-01-18 15:55:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:37,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:37,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866503226] [2022-01-18 15:55:37,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866503226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999029498] [2022-01-18 15:55:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:37,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:37,613 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 15:55:37,652 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 15:55:37,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:37,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:55:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:37,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 15:55:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999029498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:37,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 15:55:37,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-01-18 15:55:37,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921076946] [2022-01-18 15:55:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:37,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:55:37,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:55:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:55:37,768 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:37,812 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2022-01-18 15:55:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:55:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 15:55:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:37,835 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 15:55:37,835 INFO L226 Difference]: Without dead ends: 1063 [2022-01-18 15:55:37,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:55:37,837 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:37,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:55:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-18 15:55:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2022-01-18 15:55:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2022-01-18 15:55:37,858 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2022-01-18 15:55:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:37,858 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2022-01-18 15:55:37,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2022-01-18 15:55:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:37,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:37,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:38,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:38,080 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1732934325, now seen corresponding path program 1 times [2022-01-18 15:55:38,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:38,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731750469] [2022-01-18 15:55:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:38,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:38,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731750469] [2022-01-18 15:55:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731750469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635308405] [2022-01-18 15:55:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:38,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:38,148 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 15:55:38,176 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 15:55:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:55:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:55:38,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:55:38,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635308405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:38,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:38,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-01-18 15:55:38,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595839886] [2022-01-18 15:55:38,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:38,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:55:38,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:55:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:55:38,500 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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 15:55:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:38,666 INFO L93 Difference]: Finished difference Result 4899 states and 18451 transitions. [2022-01-18 15:55:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:55:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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 15:55:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:38,684 INFO L225 Difference]: With dead ends: 4899 [2022-01-18 15:55:38,684 INFO L226 Difference]: Without dead ends: 4461 [2022-01-18 15:55:38,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:55:38,685 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 226 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:38,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 427 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:55:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2022-01-18 15:55:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3248. [2022-01-18 15:55:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.041576840160148) internal successors, (13123), 3247 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13123 transitions. [2022-01-18 15:55:38,801 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13123 transitions. Word has length 33 [2022-01-18 15:55:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:38,801 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13123 transitions. [2022-01-18 15:55:38,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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 15:55:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13123 transitions. [2022-01-18 15:55:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:38,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:38,812 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, 1, 1, 1, 1] [2022-01-18 15:55:38,835 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 15:55:39,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:39,027 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash -460853709, now seen corresponding path program 2 times [2022-01-18 15:55:39,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:39,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082983863] [2022-01-18 15:55:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:39,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:39,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:39,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082983863] [2022-01-18 15:55:39,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082983863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:39,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301570524] [2022-01-18 15:55:39,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:39,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:39,088 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 15:55:39,117 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 15:55:39,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:55:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:39,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:39,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301570524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:39,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:39,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:55:39,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104547024] [2022-01-18 15:55:39,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:39,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:55:39,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:55:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:55:39,415 INFO L87 Difference]: Start difference. First operand 3248 states and 13123 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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 15:55:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:40,135 INFO L93 Difference]: Finished difference Result 11964 states and 47490 transitions. [2022-01-18 15:55:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:55:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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 35 [2022-01-18 15:55:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:40,194 INFO L225 Difference]: With dead ends: 11964 [2022-01-18 15:55:40,194 INFO L226 Difference]: Without dead ends: 11922 [2022-01-18 15:55:40,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:55:40,195 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:40,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 223 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:55:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2022-01-18 15:55:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 4644. [2022-01-18 15:55:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.164548783114365) internal successors, (19336), 4643 states have internal predecessors, (19336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 19336 transitions. [2022-01-18 15:55:40,432 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 19336 transitions. Word has length 35 [2022-01-18 15:55:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 19336 transitions. [2022-01-18 15:55:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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 15:55:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 19336 transitions. [2022-01-18 15:55:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:40,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:40,446 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, 1, 1, 1, 1] [2022-01-18 15:55:40,463 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 15:55:40,655 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,SelfDestructingSolverStorable12 [2022-01-18 15:55:40,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1368524919, now seen corresponding path program 3 times [2022-01-18 15:55:40,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:40,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293769584] [2022-01-18 15:55:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:40,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:40,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293769584] [2022-01-18 15:55:40,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293769584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240187210] [2022-01-18 15:55:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:40,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:40,691 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 15:55:40,722 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 15:55:40,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:55:40,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:55:40,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:55:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:55:41,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240187210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:41,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:41,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 15:55:41,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113459306] [2022-01-18 15:55:41,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:41,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:55:41,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:55:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:55:41,053 INFO L87 Difference]: Start difference. First operand 4644 states and 19336 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 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 15:55:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:42,031 INFO L93 Difference]: Finished difference Result 26150 states and 109813 transitions. [2022-01-18 15:55:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:55:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 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 35 [2022-01-18 15:55:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:42,179 INFO L225 Difference]: With dead ends: 26150 [2022-01-18 15:55:42,179 INFO L226 Difference]: Without dead ends: 25754 [2022-01-18 15:55:42,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=1725, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:55:42,180 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1022 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:42,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 128 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:55:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2022-01-18 15:55:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 12160. [2022-01-18 15:55:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12160 states, 12159 states have (on average 4.609260629986019) internal successors, (56044), 12159 states have internal predecessors, (56044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12160 states to 12160 states and 56044 transitions. [2022-01-18 15:55:42,923 INFO L78 Accepts]: Start accepts. Automaton has 12160 states and 56044 transitions. Word has length 35 [2022-01-18 15:55:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:42,924 INFO L470 AbstractCegarLoop]: Abstraction has 12160 states and 56044 transitions. [2022-01-18 15:55:42,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 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 15:55:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 12160 states and 56044 transitions. [2022-01-18 15:55:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:42,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:42,960 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, 1, 1, 1, 1] [2022-01-18 15:55:42,985 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 15:55:43,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:43,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1030007943, now seen corresponding path program 4 times [2022-01-18 15:55:43,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:43,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604351888] [2022-01-18 15:55:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:43,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:55:43,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:43,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604351888] [2022-01-18 15:55:43,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604351888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:55:43,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:55:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:55:43,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132478015] [2022-01-18 15:55:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:55:43,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:55:43,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:55:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:55:43,199 INFO L87 Difference]: Start difference. First operand 12160 states and 56044 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:43,524 INFO L93 Difference]: Finished difference Result 22772 states and 104836 transitions. [2022-01-18 15:55:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:55:43,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 15:55:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:43,797 INFO L225 Difference]: With dead ends: 22772 [2022-01-18 15:55:43,797 INFO L226 Difference]: Without dead ends: 22430 [2022-01-18 15:55:43,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:55:43,799 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:43,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:55:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22430 states. [2022-01-18 15:55:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22430 to 17577. [2022-01-18 15:55:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17577 states, 17576 states have (on average 4.741124260355029) internal successors, (83330), 17576 states have internal predecessors, (83330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17577 states to 17577 states and 83330 transitions. [2022-01-18 15:55:44,438 INFO L78 Accepts]: Start accepts. Automaton has 17577 states and 83330 transitions. Word has length 35 [2022-01-18 15:55:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:44,438 INFO L470 AbstractCegarLoop]: Abstraction has 17577 states and 83330 transitions. [2022-01-18 15:55:44,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 17577 states and 83330 transitions. [2022-01-18 15:55:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:44,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:44,624 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, 1, 1, 1, 1] [2022-01-18 15:55:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 15:55:44,624 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 36787659, now seen corresponding path program 5 times [2022-01-18 15:55:44,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709958945] [2022-01-18 15:55:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:44,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:44,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:44,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709958945] [2022-01-18 15:55:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709958945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:44,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030730387] [2022-01-18 15:55:44,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:44,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:44,650 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 15:55:44,679 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 15:55:44,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:55:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:55:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:44,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:44,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030730387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:44,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:44,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 15:55:44,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357763377] [2022-01-18 15:55:44,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:44,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:55:44,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:55:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:55:44,806 INFO L87 Difference]: Start difference. First operand 17577 states and 83330 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:45,077 INFO L93 Difference]: Finished difference Result 24288 states and 111523 transitions. [2022-01-18 15:55:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:55:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 15:55:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:45,204 INFO L225 Difference]: With dead ends: 24288 [2022-01-18 15:55:45,204 INFO L226 Difference]: Without dead ends: 23645 [2022-01-18 15:55:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:55:45,204 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:45,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:55:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23645 states. [2022-01-18 15:55:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23645 to 19099. [2022-01-18 15:55:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19099 states, 19098 states have (on average 4.717876217404964) internal successors, (90102), 19098 states have internal predecessors, (90102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19099 states to 19099 states and 90102 transitions. [2022-01-18 15:55:45,900 INFO L78 Accepts]: Start accepts. Automaton has 19099 states and 90102 transitions. Word has length 35 [2022-01-18 15:55:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 19099 states and 90102 transitions. [2022-01-18 15:55:45,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19099 states and 90102 transitions. [2022-01-18 15:55:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:45,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:45,958 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, 1, 1, 1, 1] [2022-01-18 15:55:45,986 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 15:55:46,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:46,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -511502213, now seen corresponding path program 6 times [2022-01-18 15:55:46,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630183485] [2022-01-18 15:55:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:46,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:46,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:46,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630183485] [2022-01-18 15:55:46,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630183485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:46,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63911647] [2022-01-18 15:55:46,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:46,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:46,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:46,230 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 15:55:46,231 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 15:55:46,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:55:46,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:55:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:46,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63911647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:46,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:46,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-01-18 15:55:46,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131904428] [2022-01-18 15:55:46,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:55:46,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:55:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:55:46,548 INFO L87 Difference]: Start difference. First operand 19099 states and 90102 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:48,620 INFO L93 Difference]: Finished difference Result 61607 states and 268988 transitions. [2022-01-18 15:55:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:55:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 15:55:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:49,121 INFO L225 Difference]: With dead ends: 61607 [2022-01-18 15:55:49,122 INFO L226 Difference]: Without dead ends: 59661 [2022-01-18 15:55:49,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1228, Invalid=3884, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:55:49,123 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 647 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:49,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 282 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:55:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59661 states. [2022-01-18 15:55:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59661 to 37618. [2022-01-18 15:55:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37618 states, 37617 states have (on average 4.593694340324853) internal successors, (172801), 37617 states have internal predecessors, (172801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37618 states to 37618 states and 172801 transitions. [2022-01-18 15:55:50,846 INFO L78 Accepts]: Start accepts. Automaton has 37618 states and 172801 transitions. Word has length 35 [2022-01-18 15:55:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:50,846 INFO L470 AbstractCegarLoop]: Abstraction has 37618 states and 172801 transitions. [2022-01-18 15:55:50,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37618 states and 172801 transitions. [2022-01-18 15:55:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:50,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:50,959 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, 1, 1, 1, 1] [2022-01-18 15:55:50,974 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 15:55:51,159 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,SelfDestructingSolverStorable16 [2022-01-18 15:55:51,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1647323397, now seen corresponding path program 7 times [2022-01-18 15:55:51,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748619942] [2022-01-18 15:55:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:51,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:51,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:51,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748619942] [2022-01-18 15:55:51,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748619942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:51,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480549885] [2022-01-18 15:55:51,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:51,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:51,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:51,232 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 15:55:51,234 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 15:55:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:55:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:51,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:51,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480549885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:51,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:51,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 15:55:51,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517667242] [2022-01-18 15:55:51,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:51,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:55:51,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:55:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:55:51,544 INFO L87 Difference]: Start difference. First operand 37618 states and 172801 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 15:55:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:52,977 INFO L93 Difference]: Finished difference Result 107350 states and 486163 transitions. [2022-01-18 15:55:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:55:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 35 [2022-01-18 15:55:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:53,888 INFO L225 Difference]: With dead ends: 107350 [2022-01-18 15:55:53,888 INFO L226 Difference]: Without dead ends: 105030 [2022-01-18 15:55:53,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:55:53,889 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 615 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:53,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 165 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:55:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105030 states. [2022-01-18 15:55:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105030 to 65463. [2022-01-18 15:55:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65463 states, 65462 states have (on average 4.7165531147841495) internal successors, (308755), 65462 states have internal predecessors, (308755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65463 states to 65463 states and 308755 transitions. [2022-01-18 15:55:57,085 INFO L78 Accepts]: Start accepts. Automaton has 65463 states and 308755 transitions. Word has length 35 [2022-01-18 15:55:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:57,085 INFO L470 AbstractCegarLoop]: Abstraction has 65463 states and 308755 transitions. [2022-01-18 15:55:57,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 15:55:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65463 states and 308755 transitions. [2022-01-18 15:55:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 15:55:57,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:57,253 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, 1, 1, 1, 1] [2022-01-18 15:55:57,276 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 15:55:57,473 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,SelfDestructingSolverStorable17 [2022-01-18 15:55:57,474 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:57,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1868618369, now seen corresponding path program 8 times [2022-01-18 15:55:57,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941849839] [2022-01-18 15:55:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:57,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:57,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941849839] [2022-01-18 15:55:57,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941849839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124182913] [2022-01-18 15:55:57,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:57,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:57,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:57,528 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 15:55:57,530 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 15:55:57,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:55:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:57,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124182913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:57,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:57,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 15:55:57,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910026952] [2022-01-18 15:55:57,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:57,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:55:57,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:55:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:55:57,824 INFO L87 Difference]: Start difference. First operand 65463 states and 308755 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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 15:55:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:59,609 INFO L93 Difference]: Finished difference Result 131125 states and 590675 transitions. [2022-01-18 15:55:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:55:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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 35 [2022-01-18 15:55:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:00,808 INFO L225 Difference]: With dead ends: 131125 [2022-01-18 15:56:00,809 INFO L226 Difference]: Without dead ends: 130939 [2022-01-18 15:56:00,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:56:00,809 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 602 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:00,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 207 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130939 states. [2022-01-18 15:56:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130939 to 84261. [2022-01-18 15:56:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84261 states, 84260 states have (on average 4.7022549252314265) internal successors, (396212), 84260 states have internal predecessors, (396212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84261 states to 84261 states and 396212 transitions. [2022-01-18 15:56:04,865 INFO L78 Accepts]: Start accepts. Automaton has 84261 states and 396212 transitions. Word has length 35 [2022-01-18 15:56:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:04,865 INFO L470 AbstractCegarLoop]: Abstraction has 84261 states and 396212 transitions. [2022-01-18 15:56:04,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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 15:56:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84261 states and 396212 transitions. [2022-01-18 15:56:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 15:56:05,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:05,061 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, 1, 1, 1, 1] [2022-01-18 15:56:05,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,262 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:56:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1914606333, now seen corresponding path program 9 times [2022-01-18 15:56:05,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:05,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86702979] [2022-01-18 15:56:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:05,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:05,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:05,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86702979] [2022-01-18 15:56:05,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86702979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78072945] [2022-01-18 15:56:05,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:05,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:05,306 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 15:56:05,307 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 15:56:05,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:56:05,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:56:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:05,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78072945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:05,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:05,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 9 [2022-01-18 15:56:05,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229585068] [2022-01-18 15:56:05,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:05,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:56:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:56:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:56:05,546 INFO L87 Difference]: Start difference. First operand 84261 states and 396212 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 15:56:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:07,394 INFO L93 Difference]: Finished difference Result 132476 states and 608383 transitions. [2022-01-18 15:56:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:56:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 37 [2022-01-18 15:56:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:08,136 INFO L225 Difference]: With dead ends: 132476 [2022-01-18 15:56:08,136 INFO L226 Difference]: Without dead ends: 131442 [2022-01-18 15:56:08,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:56:08,137 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 219 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:08,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:56:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131442 states. [2022-01-18 15:56:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131442 to 101762. [2022-01-18 15:56:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101762 states, 101761 states have (on average 4.729984964770393) internal successors, (481328), 101761 states have internal predecessors, (481328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101762 states to 101762 states and 481328 transitions. [2022-01-18 15:56:12,773 INFO L78 Accepts]: Start accepts. Automaton has 101762 states and 481328 transitions. Word has length 37 [2022-01-18 15:56:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:12,773 INFO L470 AbstractCegarLoop]: Abstraction has 101762 states and 481328 transitions. [2022-01-18 15:56:12,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 15:56:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 101762 states and 481328 transitions. [2022-01-18 15:56:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 15:56:13,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:13,054 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, 1, 1, 1, 1] [2022-01-18 15:56:13,069 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 15:56:13,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:13,255 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:56:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 119071037, now seen corresponding path program 10 times [2022-01-18 15:56:13,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506894356] [2022-01-18 15:56:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:13,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:13,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:13,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506894356] [2022-01-18 15:56:13,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506894356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:13,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521820846] [2022-01-18 15:56:13,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:13,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:13,321 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 15:56:13,323 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 15:56:13,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:56:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:13,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:56:13,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521820846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:13,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:13,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:56:13,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010920092] [2022-01-18 15:56:13,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:13,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:56:13,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:56:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:56:13,667 INFO L87 Difference]: Start difference. First operand 101762 states and 481328 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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 15:56:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:17,184 INFO L93 Difference]: Finished difference Result 225429 states and 1055743 transitions. [2022-01-18 15:56:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:56:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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 37 [2022-01-18 15:56:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:18,601 INFO L225 Difference]: With dead ends: 225429 [2022-01-18 15:56:18,601 INFO L226 Difference]: Without dead ends: 224048 [2022-01-18 15:56:18,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:56:18,602 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 580 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:18,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 191 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:56:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224048 states. [2022-01-18 15:56:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224048 to 175351. [2022-01-18 15:56:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175351 states, 175350 states have (on average 4.8957627601938976) internal successors, (858472), 175350 states have internal predecessors, (858472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175351 states to 175351 states and 858472 transitions. [2022-01-18 15:56:27,676 INFO L78 Accepts]: Start accepts. Automaton has 175351 states and 858472 transitions. Word has length 37 [2022-01-18 15:56:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:27,676 INFO L470 AbstractCegarLoop]: Abstraction has 175351 states and 858472 transitions. [2022-01-18 15:56:27,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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 15:56:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 175351 states and 858472 transitions. [2022-01-18 15:56:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 15:56:28,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:28,137 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, 1, 1, 1, 1] [2022-01-18 15:56:28,153 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 15:56:28,339 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,SelfDestructingSolverStorable20 [2022-01-18 15:56:28,339 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:56:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash 862530109, now seen corresponding path program 11 times [2022-01-18 15:56:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522507219] [2022-01-18 15:56:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:28,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:56:28,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522507219] [2022-01-18 15:56:28,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522507219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059129115] [2022-01-18 15:56:28,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:28,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:28,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:28,393 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 15:56:28,394 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 15:56:28,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:56:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:56:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:28,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:28,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059129115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:28,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:28,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 15:56:28,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542529102] [2022-01-18 15:56:28,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:28,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:56:28,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:56:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:56:28,669 INFO L87 Difference]: Start difference. First operand 175351 states and 858472 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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 15:56:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:35,488 INFO L93 Difference]: Finished difference Result 455289 states and 2152646 transitions. [2022-01-18 15:56:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:56:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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 37 [2022-01-18 15:56:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:39,558 INFO L225 Difference]: With dead ends: 455289 [2022-01-18 15:56:39,558 INFO L226 Difference]: Without dead ends: 445874 [2022-01-18 15:56:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=884, Invalid=3276, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:56:39,560 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 537 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:39,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 357 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:56:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445874 states. [2022-01-18 15:56:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445874 to 322452. [2022-01-18 15:56:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322452 states, 322451 states have (on average 4.898114752318957) internal successors, (1579402), 322451 states have internal predecessors, (1579402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322452 states to 322452 states and 1579402 transitions. [2022-01-18 15:56:59,374 INFO L78 Accepts]: Start accepts. Automaton has 322452 states and 1579402 transitions. Word has length 37 [2022-01-18 15:56:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:59,374 INFO L470 AbstractCegarLoop]: Abstraction has 322452 states and 1579402 transitions. [2022-01-18 15:56:59,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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 15:56:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 322452 states and 1579402 transitions. [2022-01-18 15:57:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 15:57:00,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:00,947 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, 1, 1, 1, 1] [2022-01-18 15:57:00,962 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 15:57:01,147 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,SelfDestructingSolverStorable21 [2022-01-18 15:57:01,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:57:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1700987573, now seen corresponding path program 12 times [2022-01-18 15:57:01,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773976831] [2022-01-18 15:57:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:01,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:57:01,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:01,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773976831] [2022-01-18 15:57:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773976831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:01,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229999520] [2022-01-18 15:57:01,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:57:01,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:01,176 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 15:57:01,177 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 15:57:01,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:57:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:57:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:57:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:01,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:57:01,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229999520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:01,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:01,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 17 [2022-01-18 15:57:01,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703713303] [2022-01-18 15:57:01,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:01,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:57:01,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:57:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:57:01,527 INFO L87 Difference]: Start difference. First operand 322452 states and 1579402 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 15:57:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:09,803 INFO L93 Difference]: Finished difference Result 436832 states and 2113397 transitions. [2022-01-18 15:57:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:57:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 37 [2022-01-18 15:57:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:17,045 INFO L225 Difference]: With dead ends: 436832 [2022-01-18 15:57:17,045 INFO L226 Difference]: Without dead ends: 434894 [2022-01-18 15:57:17,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1054, Invalid=3106, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:57:17,046 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 427 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:17,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 251 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:57:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434894 states. [2022-01-18 15:57:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434894 to 384064. [2022-01-18 15:57:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384064 states, 384063 states have (on average 4.9422724917526555) internal successors, (1898144), 384063 states have internal predecessors, (1898144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:57:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384064 states to 384064 states and 1898144 transitions. [2022-01-18 15:57:36,340 INFO L78 Accepts]: Start accepts. Automaton has 384064 states and 1898144 transitions. Word has length 37 [2022-01-18 15:57:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:57:36,341 INFO L470 AbstractCegarLoop]: Abstraction has 384064 states and 1898144 transitions. [2022-01-18 15:57:36,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 15:57:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 384064 states and 1898144 transitions. [2022-01-18 15:57:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 15:57:38,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:57:38,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2022-01-18 15:57:38,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-18 15:57:38,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:38,589 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:57:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:57:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash 942207807, now seen corresponding path program 13 times [2022-01-18 15:57:38,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:57:38,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828599094] [2022-01-18 15:57:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:57:38,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:57:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 15:57:38,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:57:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828599094] [2022-01-18 15:57:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828599094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:57:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333573331] [2022-01-18 15:57:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:57:38,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:57:38,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:57:38,637 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 15:57:38,638 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 15:57:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:57:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 15:57:38,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:57:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:38,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:57:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:57:39,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333573331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:57:39,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:57:39,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2022-01-18 15:57:39,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397861467] [2022-01-18 15:57:39,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:57:39,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:57:39,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:57:39,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:57:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:57:39,002 INFO L87 Difference]: Start difference. First operand 384064 states and 1898144 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 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 15:57:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:57:51,048 INFO L93 Difference]: Finished difference Result 771440 states and 3668557 transitions. [2022-01-18 15:57:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:57:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 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 39 [2022-01-18 15:57:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:57:59,407 INFO L225 Difference]: With dead ends: 771440 [2022-01-18 15:57:59,407 INFO L226 Difference]: Without dead ends: 760872 [2022-01-18 15:57:59,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1124, Invalid=3166, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:57:59,409 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 451 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:57:59,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 464 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:58:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760872 states. [2022-01-18 15:58:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760872 to 501560. [2022-01-18 15:58:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501560 states, 501559 states have (on average 4.895444005590568) internal successors, (2455354), 501559 states have internal predecessors, (2455354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501560 states to 501560 states and 2455354 transitions. [2022-01-18 15:58:38,252 INFO L78 Accepts]: Start accepts. Automaton has 501560 states and 2455354 transitions. Word has length 39 [2022-01-18 15:58:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:58:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 501560 states and 2455354 transitions. [2022-01-18 15:58:38,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 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 15:58:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 501560 states and 2455354 transitions. [2022-01-18 15:58:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 15:58:41,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:58:41,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 15:58:41,577 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 15:58:41,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:41,785 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:58:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:58:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1535810063, now seen corresponding path program 14 times [2022-01-18 15:58:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:58:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628756410] [2022-01-18 15:58:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:58:41,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:58:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:58:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 15:58:41,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:58:41,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628756410] [2022-01-18 15:58:41,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628756410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:58:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628696513] [2022-01-18 15:58:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:58:41,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:58:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:58:41,924 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 15:58:41,925 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 15:58:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:58:41,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:58:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:58:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:58:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:58:43,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:58:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:58:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628696513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:58:43,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:58:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 20 [2022-01-18 15:58:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377023043] [2022-01-18 15:58:43,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:58:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:58:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:58:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:58:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:58:43,576 INFO L87 Difference]: Start difference. First operand 501560 states and 2455354 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:58:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:58:55,823 INFO L93 Difference]: Finished difference Result 602829 states and 2888538 transitions. [2022-01-18 15:58:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:58:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 15:58:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:59:05,112 INFO L225 Difference]: With dead ends: 602829 [2022-01-18 15:59:05,113 INFO L226 Difference]: Without dead ends: 595514 [2022-01-18 15:59:05,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:59:05,114 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 318 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:59:05,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 492 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:59:07,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595514 states. [2022-01-18 15:59:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595514 to 541601. [2022-01-18 15:59:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541601 states, 541600 states have (on average 4.8765251107828655) internal successors, (2641126), 541600 states have internal predecessors, (2641126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541601 states to 541601 states and 2641126 transitions. [2022-01-18 15:59:40,475 INFO L78 Accepts]: Start accepts. Automaton has 541601 states and 2641126 transitions. Word has length 41 [2022-01-18 15:59:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:59:40,475 INFO L470 AbstractCegarLoop]: Abstraction has 541601 states and 2641126 transitions. [2022-01-18 15:59:40,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:59:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 541601 states and 2641126 transitions. [2022-01-18 15:59:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 15:59:43,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:59:43,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 15:59:43,043 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 15:59:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 15:59:43,228 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:59:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:59:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1812645617, now seen corresponding path program 15 times [2022-01-18 15:59:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:59:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465255321] [2022-01-18 15:59:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:59:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:59:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:59:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:59:43,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:59:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465255321] [2022-01-18 15:59:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465255321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:59:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337454888] [2022-01-18 15:59:43,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:59:43,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:59:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:59:43,310 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 15:59:43,310 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 15:59:43,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:59:43,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:59:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:59:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:59:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:59:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:59:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:59:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337454888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:59:43,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:59:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:59:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540022472] [2022-01-18 15:59:43,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:59:43,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:59:43,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:59:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:59:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:59:43,703 INFO L87 Difference]: Start difference. First operand 541601 states and 2641126 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:00:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:00:08,556 INFO L93 Difference]: Finished difference Result 1170073 states and 5681311 transitions. [2022-01-18 16:00:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:00:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 16:00:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:00:22,929 INFO L225 Difference]: With dead ends: 1170073 [2022-01-18 16:00:22,929 INFO L226 Difference]: Without dead ends: 1167326 [2022-01-18 16:00:22,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:00:22,929 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 369 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:00:22,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 903 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:00:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167326 states. [2022-01-18 16:01:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167326 to 902704. [2022-01-18 16:01:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902704 states, 902703 states have (on average 4.887686204654244) internal successors, (4412129), 902703 states have internal predecessors, (4412129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902704 states to 902704 states and 4412129 transitions. [2022-01-18 16:01:38,774 INFO L78 Accepts]: Start accepts. Automaton has 902704 states and 4412129 transitions. Word has length 41 [2022-01-18 16:01:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:01:38,774 INFO L470 AbstractCegarLoop]: Abstraction has 902704 states and 4412129 transitions. [2022-01-18 16:01:38,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:01:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 902704 states and 4412129 transitions. [2022-01-18 16:01:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:01:45,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:01:45,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 16:01:45,414 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 16:01:45,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 16:01:45,613 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 16:01:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:01:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1466477423, now seen corresponding path program 16 times [2022-01-18 16:01:45,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:01:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431871373] [2022-01-18 16:01:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:01:45,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:01:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:01:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:01:45,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:01:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431871373] [2022-01-18 16:01:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431871373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:01:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101426498] [2022-01-18 16:01:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:01:45,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:01:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:01:45,673 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 16:01:45,675 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 16:01:45,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:01:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:01:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:01:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:01:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:01:45,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:01:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:01:46,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101426498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:01:46,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:01:46,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 16:01:46,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266208992] [2022-01-18 16:01:46,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:01:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:01:46,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:01:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:01:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:01:46,055 INFO L87 Difference]: Start difference. First operand 902704 states and 4412129 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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)