/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 15:11:43,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 15:11:43,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 15:11:43,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 15:11:43,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 15:11:43,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 15:11:43,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 15:11:43,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-07 15:11:43,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 15:11:43,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 15:11:43,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-07 15:11:43,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-07 15:11:43,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-07 15:11:43,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-07 15:11:43,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-07 15:11:43,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-07 15:11:43,934 INFO L138 SettingsManager]: * Use SBE=true [2022-04-07 15:11:43,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 15:11:43,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 15:11:43,936 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-07 15:11:43,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 15:11:43,937 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 15:11:43,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 15:11:43,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 15:11:43,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 15:11:43,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 15:11:43,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 15:11:43,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-07 15:11:43,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 15:11:43,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 15:11:44,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 15:11:44,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 15:11:44,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 15:11:44,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 15:11:44,209 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 15:11:44,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2022-04-07 15:11:44,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1635c033c/69f41d6608124a5ba476c8748affc683/FLAGca7080f36 [2022-04-07 15:11:44,645 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 15:11:44,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2022-04-07 15:11:44,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1635c033c/69f41d6608124a5ba476c8748affc683/FLAGca7080f36 [2022-04-07 15:11:45,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1635c033c/69f41d6608124a5ba476c8748affc683 [2022-04-07 15:11:45,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 15:11:45,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 15:11:45,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 15:11:45,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 15:11:45,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 15:11:45,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f47c4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45, skipping insertion in model container [2022-04-07 15:11:45,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 15:11:45,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 15:11:45,267 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2022-04-07 15:11:45,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 15:11:45,287 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 15:11:45,300 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2022-04-07 15:11:45,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 15:11:45,315 INFO L208 MainTranslator]: Completed translation [2022-04-07 15:11:45,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45 WrapperNode [2022-04-07 15:11:45,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 15:11:45,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 15:11:45,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 15:11:45,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 15:11:45,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 15:11:45,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 15:11:45,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 15:11:45,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 15:11:45,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (1/1) ... [2022-04-07 15:11:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 15:11:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 15:11:45,372 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) [2022-04-07 15:11:45,394 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 [2022-04-07 15:11:45,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 15:11:45,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 15:11:45,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 15:11:45,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 15:11:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 15:11:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 15:11:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 15:11:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 15:11:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 15:11:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 15:11:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 15:11:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 15:11:45,472 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 15:11:45,473 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 15:11:45,659 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 15:11:45,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 15:11:45,665 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 15:11:45,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 03:11:45 BoogieIcfgContainer [2022-04-07 15:11:45,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 15:11:45,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 15:11:45,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 15:11:45,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 15:11:45,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 03:11:45" (1/3) ... [2022-04-07 15:11:45,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb6083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 03:11:45, skipping insertion in model container [2022-04-07 15:11:45,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 03:11:45" (2/3) ... [2022-04-07 15:11:45,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb6083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 03:11:45, skipping insertion in model container [2022-04-07 15:11:45,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 03:11:45" (3/3) ... [2022-04-07 15:11:45,672 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2022-04-07 15:11:45,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-07 15:11:45,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 15:11:45,709 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 15:11:45,714 INFO L340 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=PETRI_NET, 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 [2022-04-07 15:11:45,714 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 15:11:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 15:11:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-07 15:11:45,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 15:11:45,734 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 15:11:45,734 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 15:11:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 15:11:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-04-07 15:11:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 15:11:45,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987885325] [2022-04-07 15:11:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 15:11:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:45,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 15:11:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:45,955 INFO L290 TraceCheckUtils]: 0: Hoare triple {42#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-07 15:11:45,955 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-07 15:11:45,956 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #65#return; {33#true} is VALID [2022-04-07 15:11:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 15:11:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:45,963 INFO L290 TraceCheckUtils]: 0: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-07 15:11:45,964 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-07 15:11:45,964 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-07 15:11:45,964 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-07 15:11:45,965 INFO L272 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {42#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-07 15:11:45,965 INFO L290 TraceCheckUtils]: 1: Hoare triple {42#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-07 15:11:45,965 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-07 15:11:45,966 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #65#return; {33#true} is VALID [2022-04-07 15:11:45,966 INFO L272 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret7 := main(); {33#true} is VALID [2022-04-07 15:11:45,966 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {33#true} is VALID [2022-04-07 15:11:45,966 INFO L272 TraceCheckUtils]: 6: Hoare triple {33#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {33#true} is VALID [2022-04-07 15:11:45,967 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-07 15:11:45,967 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-07 15:11:45,967 INFO L290 TraceCheckUtils]: 9: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-07 15:11:45,967 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-07 15:11:45,968 INFO L290 TraceCheckUtils]: 11: Hoare triple {34#false} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {34#false} is VALID [2022-04-07 15:11:45,968 INFO L290 TraceCheckUtils]: 12: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-07 15:11:45,968 INFO L272 TraceCheckUtils]: 13: Hoare triple {34#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {34#false} is VALID [2022-04-07 15:11:45,968 INFO L290 TraceCheckUtils]: 14: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2022-04-07 15:11:45,968 INFO L290 TraceCheckUtils]: 15: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2022-04-07 15:11:45,969 INFO L290 TraceCheckUtils]: 16: Hoare triple {34#false} assume !false; {34#false} is VALID [2022-04-07 15:11:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 15:11:45,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 15:11:45,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987885325] [2022-04-07 15:11:45,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987885325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 15:11:45,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 15:11:45,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 15:11:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405006386] [2022-04-07 15:11:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 15:11:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-07 15:11:45,977 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-07 15:11:45,979 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:45,999 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:45,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 15:11:45,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-07 15:11:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 15:11:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 15:11:46,022 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,157 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-07 15:11:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 15:11:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-07 15:11:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 15:11:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2022-04-07 15:11:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2022-04-07 15:11:46,172 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 66 transitions. [2022-04-07 15:11:46,254 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 66 edges. 66 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:46,264 INFO L225 Difference]: With dead ends: 52 [2022-04-07 15:11:46,265 INFO L226 Difference]: Without dead ends: 26 [2022-04-07 15:11:46,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 15:11:46,272 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 15:11:46,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 15:11:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-07 15:11:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-07 15:11:46,302 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-07 15:11:46,304 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,305 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,306 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,312 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-07 15:11:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-07 15:11:46,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:46,313 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:46,313 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 26 states. [2022-04-07 15:11:46,314 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 26 states. [2022-04-07 15:11:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,319 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-07 15:11:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-07 15:11:46,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:46,324 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:46,324 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-07 15:11:46,324 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-07 15:11:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-07 15:11:46,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-07 15:11:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 15:11:46,327 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-07 15:11:46,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-07 15:11:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-07 15:11:46,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 15:11:46,329 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 15:11:46,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 15:11:46,329 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 15:11:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 15:11:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-04-07 15:11:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 15:11:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079937373] [2022-04-07 15:11:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 15:11:46,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 15:11:46,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775235513] [2022-04-07 15:11:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 15:11:46,376 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) [2022-04-07 15:11:46,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 15:11:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-07 15:11:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 15:11:46,688 INFO L272 TraceCheckUtils]: 0: Hoare triple {199#true} call ULTIMATE.init(); {199#true} is VALID [2022-04-07 15:11:46,689 INFO L290 TraceCheckUtils]: 1: Hoare triple {199#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,690 INFO L290 TraceCheckUtils]: 2: Hoare triple {207#(<= ~counter~0 0)} assume true; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,690 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {207#(<= ~counter~0 0)} {199#true} #65#return; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,691 INFO L272 TraceCheckUtils]: 4: Hoare triple {207#(<= ~counter~0 0)} call #t~ret7 := main(); {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,691 INFO L290 TraceCheckUtils]: 5: Hoare triple {207#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,692 INFO L272 TraceCheckUtils]: 6: Hoare triple {207#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,692 INFO L290 TraceCheckUtils]: 7: Hoare triple {207#(<= ~counter~0 0)} ~cond := #in~cond; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,693 INFO L290 TraceCheckUtils]: 8: Hoare triple {207#(<= ~counter~0 0)} assume !(0 == ~cond); {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,693 INFO L290 TraceCheckUtils]: 9: Hoare triple {207#(<= ~counter~0 0)} assume true; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,694 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {207#(<= ~counter~0 0)} {207#(<= ~counter~0 0)} #59#return; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,694 INFO L290 TraceCheckUtils]: 11: Hoare triple {207#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {207#(<= ~counter~0 0)} is VALID [2022-04-07 15:11:46,694 INFO L290 TraceCheckUtils]: 12: Hoare triple {207#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {241#(<= |main_#t~post6| 0)} is VALID [2022-04-07 15:11:46,695 INFO L290 TraceCheckUtils]: 13: Hoare triple {241#(<= |main_#t~post6| 0)} assume !(#t~post6 < 1);havoc #t~post6; {200#false} is VALID [2022-04-07 15:11:46,695 INFO L272 TraceCheckUtils]: 14: Hoare triple {200#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {200#false} is VALID [2022-04-07 15:11:46,695 INFO L290 TraceCheckUtils]: 15: Hoare triple {200#false} ~cond := #in~cond; {200#false} is VALID [2022-04-07 15:11:46,696 INFO L290 TraceCheckUtils]: 16: Hoare triple {200#false} assume 0 == ~cond; {200#false} is VALID [2022-04-07 15:11:46,696 INFO L290 TraceCheckUtils]: 17: Hoare triple {200#false} assume !false; {200#false} is VALID [2022-04-07 15:11:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 15:11:46,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 15:11:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 15:11:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079937373] [2022-04-07 15:11:46,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 15:11:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775235513] [2022-04-07 15:11:46,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775235513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 15:11:46,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 15:11:46,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-07 15:11:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060510582] [2022-04-07 15:11:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 15:11:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-07 15:11:46,699 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-07 15:11:46,699 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 15:11:46,718 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:46,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-07 15:11:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-07 15:11:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-07 15:11:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 15:11:46,721 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 15:11:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,795 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-07 15:11:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-07 15:11:46,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-07 15:11:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 15:11:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 15:11:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-07 15:11:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 15:11:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-07 15:11:46,800 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 37 transitions. [2022-04-07 15:11:46,830 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:46,832 INFO L225 Difference]: With dead ends: 34 [2022-04-07 15:11:46,832 INFO L226 Difference]: Without dead ends: 27 [2022-04-07 15:11:46,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 15:11:46,833 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 15:11:46,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 15:11:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-07 15:11:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-07 15:11:46,842 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-07 15:11:46,842 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,842 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,843 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,845 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-04-07 15:11:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-07 15:11:46,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:46,845 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:46,846 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-07 15:11:46,846 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-07 15:11:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:46,848 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-04-07 15:11:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-07 15:11:46,848 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:46,848 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:46,849 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-07 15:11:46,849 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-07 15:11:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 15:11:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-07 15:11:46,851 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-07 15:11:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 15:11:46,851 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-07 15:11:46,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 15:11:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-07 15:11:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-07 15:11:46,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 15:11:46,852 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 15:11:46,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 15:11:47,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:47,072 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 15:11:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 15:11:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-04-07 15:11:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 15:11:47,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102641033] [2022-04-07 15:11:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:47,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 15:11:47,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 15:11:47,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192837929] [2022-04-07 15:11:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 15:11:47,093 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) [2022-04-07 15:11:47,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 15:11:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-07 15:11:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 15:11:47,252 INFO L272 TraceCheckUtils]: 0: Hoare triple {395#true} call ULTIMATE.init(); {395#true} is VALID [2022-04-07 15:11:47,253 INFO L290 TraceCheckUtils]: 1: Hoare triple {395#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {395#true} is VALID [2022-04-07 15:11:47,253 INFO L290 TraceCheckUtils]: 2: Hoare triple {395#true} assume true; {395#true} is VALID [2022-04-07 15:11:47,253 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {395#true} {395#true} #65#return; {395#true} is VALID [2022-04-07 15:11:47,253 INFO L272 TraceCheckUtils]: 4: Hoare triple {395#true} call #t~ret7 := main(); {395#true} is VALID [2022-04-07 15:11:47,254 INFO L290 TraceCheckUtils]: 5: Hoare triple {395#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {395#true} is VALID [2022-04-07 15:11:47,254 INFO L272 TraceCheckUtils]: 6: Hoare triple {395#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {395#true} is VALID [2022-04-07 15:11:47,254 INFO L290 TraceCheckUtils]: 7: Hoare triple {395#true} ~cond := #in~cond; {395#true} is VALID [2022-04-07 15:11:47,254 INFO L290 TraceCheckUtils]: 8: Hoare triple {395#true} assume !(0 == ~cond); {395#true} is VALID [2022-04-07 15:11:47,254 INFO L290 TraceCheckUtils]: 9: Hoare triple {395#true} assume true; {395#true} is VALID [2022-04-07 15:11:47,254 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {395#true} {395#true} #59#return; {395#true} is VALID [2022-04-07 15:11:47,255 INFO L290 TraceCheckUtils]: 11: Hoare triple {395#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-07 15:11:47,255 INFO L290 TraceCheckUtils]: 12: Hoare triple {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-07 15:11:47,256 INFO L290 TraceCheckUtils]: 13: Hoare triple {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 1);havoc #t~post6; {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-07 15:11:47,257 INFO L272 TraceCheckUtils]: 14: Hoare triple {433#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {443#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-07 15:11:47,258 INFO L290 TraceCheckUtils]: 15: Hoare triple {443#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {447#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-07 15:11:47,258 INFO L290 TraceCheckUtils]: 16: Hoare triple {447#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {396#false} is VALID [2022-04-07 15:11:47,258 INFO L290 TraceCheckUtils]: 17: Hoare triple {396#false} assume !false; {396#false} is VALID [2022-04-07 15:11:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 15:11:47,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 15:11:47,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 15:11:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102641033] [2022-04-07 15:11:47,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 15:11:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192837929] [2022-04-07 15:11:47,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192837929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 15:11:47,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 15:11:47,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 15:11:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846616023] [2022-04-07 15:11:47,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 15:11:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-07 15:11:47,260 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-07 15:11:47,260 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:47,275 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:47,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 15:11:47,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-07 15:11:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 15:11:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 15:11:47,276 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:47,396 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-07 15:11:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 15:11:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-07 15:11:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 15:11:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-07 15:11:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-07 15:11:47,400 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 43 transitions. [2022-04-07 15:11:47,435 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:47,437 INFO L225 Difference]: With dead ends: 38 [2022-04-07 15:11:47,437 INFO L226 Difference]: Without dead ends: 36 [2022-04-07 15:11:47,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 15:11:47,438 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 15:11:47,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 15:11:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-07 15:11:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-07 15:11:47,446 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-07 15:11:47,447 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:47,447 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:47,447 INFO L87 Difference]: Start difference. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:47,449 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-07 15:11:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-07 15:11:47,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:47,450 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:47,450 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 36 states. [2022-04-07 15:11:47,451 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 36 states. [2022-04-07 15:11:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:47,453 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-07 15:11:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-07 15:11:47,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:47,453 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:47,454 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-07 15:11:47,454 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-07 15:11:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-07 15:11:47,456 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-07 15:11:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 15:11:47,456 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-07 15:11:47,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 15:11:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-07 15:11:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-07 15:11:47,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 15:11:47,457 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 15:11:47,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 15:11:47,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-07 15:11:47,680 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 15:11:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 15:11:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-04-07 15:11:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 15:11:47,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124835155] [2022-04-07 15:11:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:47,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 15:11:47,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 15:11:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040907471] [2022-04-07 15:11:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:47,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 15:11:47,703 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) [2022-04-07 15:11:47,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 15:11:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 15:11:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 15:11:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 15:11:47,902 INFO L272 TraceCheckUtils]: 0: Hoare triple {624#true} call ULTIMATE.init(); {624#true} is VALID [2022-04-07 15:11:47,902 INFO L290 TraceCheckUtils]: 1: Hoare triple {624#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {624#true} is VALID [2022-04-07 15:11:47,902 INFO L290 TraceCheckUtils]: 2: Hoare triple {624#true} assume true; {624#true} is VALID [2022-04-07 15:11:47,902 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {624#true} {624#true} #65#return; {624#true} is VALID [2022-04-07 15:11:47,902 INFO L272 TraceCheckUtils]: 4: Hoare triple {624#true} call #t~ret7 := main(); {624#true} is VALID [2022-04-07 15:11:47,903 INFO L290 TraceCheckUtils]: 5: Hoare triple {624#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {624#true} is VALID [2022-04-07 15:11:47,903 INFO L272 TraceCheckUtils]: 6: Hoare triple {624#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {624#true} is VALID [2022-04-07 15:11:47,903 INFO L290 TraceCheckUtils]: 7: Hoare triple {624#true} ~cond := #in~cond; {650#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-07 15:11:47,904 INFO L290 TraceCheckUtils]: 8: Hoare triple {650#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {654#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-07 15:11:47,904 INFO L290 TraceCheckUtils]: 9: Hoare triple {654#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {654#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-07 15:11:47,905 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {654#(not (= |assume_abort_if_not_#in~cond| 0))} {624#true} #59#return; {661#(<= 1 main_~b~0)} is VALID [2022-04-07 15:11:47,906 INFO L290 TraceCheckUtils]: 11: Hoare triple {661#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {665#(<= 1 main_~y~0)} is VALID [2022-04-07 15:11:47,907 INFO L290 TraceCheckUtils]: 12: Hoare triple {665#(<= 1 main_~y~0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {665#(<= 1 main_~y~0)} is VALID [2022-04-07 15:11:47,908 INFO L290 TraceCheckUtils]: 13: Hoare triple {665#(<= 1 main_~y~0)} assume !!(#t~post6 < 1);havoc #t~post6; {665#(<= 1 main_~y~0)} is VALID [2022-04-07 15:11:47,913 INFO L272 TraceCheckUtils]: 14: Hoare triple {665#(<= 1 main_~y~0)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {624#true} is VALID [2022-04-07 15:11:47,913 INFO L290 TraceCheckUtils]: 15: Hoare triple {624#true} ~cond := #in~cond; {624#true} is VALID [2022-04-07 15:11:47,914 INFO L290 TraceCheckUtils]: 16: Hoare triple {624#true} assume !(0 == ~cond); {624#true} is VALID [2022-04-07 15:11:47,917 INFO L290 TraceCheckUtils]: 17: Hoare triple {624#true} assume true; {624#true} is VALID [2022-04-07 15:11:47,919 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {624#true} {665#(<= 1 main_~y~0)} #61#return; {665#(<= 1 main_~y~0)} is VALID [2022-04-07 15:11:47,919 INFO L290 TraceCheckUtils]: 19: Hoare triple {665#(<= 1 main_~y~0)} assume !(0 != ~y~0); {625#false} is VALID [2022-04-07 15:11:47,920 INFO L272 TraceCheckUtils]: 20: Hoare triple {625#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {625#false} is VALID [2022-04-07 15:11:47,920 INFO L290 TraceCheckUtils]: 21: Hoare triple {625#false} ~cond := #in~cond; {625#false} is VALID [2022-04-07 15:11:47,920 INFO L290 TraceCheckUtils]: 22: Hoare triple {625#false} assume 0 == ~cond; {625#false} is VALID [2022-04-07 15:11:47,920 INFO L290 TraceCheckUtils]: 23: Hoare triple {625#false} assume !false; {625#false} is VALID [2022-04-07 15:11:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 15:11:47,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 15:11:47,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 15:11:47,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124835155] [2022-04-07 15:11:47,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 15:11:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040907471] [2022-04-07 15:11:47,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040907471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 15:11:47,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 15:11:47,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 15:11:47,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987988562] [2022-04-07 15:11:47,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 15:11:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-07 15:11:47,924 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-07 15:11:47,925 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 15:11:47,944 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:47,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 15:11:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-07 15:11:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 15:11:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-07 15:11:47,946 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 15:11:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:48,111 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-07 15:11:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 15:11:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-07 15:11:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 15:11:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 15:11:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-04-07 15:11:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 15:11:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-04-07 15:11:48,116 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 43 transitions. [2022-04-07 15:11:48,157 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-07 15:11:48,159 INFO L225 Difference]: With dead ends: 42 [2022-04-07 15:11:48,159 INFO L226 Difference]: Without dead ends: 35 [2022-04-07 15:11:48,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 15:11:48,160 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 15:11:48,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 15:11:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-07 15:11:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-07 15:11:48,172 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-07 15:11:48,173 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:48,173 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:48,173 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:48,175 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-07 15:11:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-07 15:11:48,175 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:48,175 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:48,176 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 35 states. [2022-04-07 15:11:48,176 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 35 states. [2022-04-07 15:11:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 15:11:48,178 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-07 15:11:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-07 15:11:48,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 15:11:48,178 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-07 15:11:48,178 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-07 15:11:48,178 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-07 15:11:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 15:11:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-07 15:11:48,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-07 15:11:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 15:11:48,180 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-07 15:11:48,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 15:11:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-07 15:11:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 15:11:48,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 15:11:48,181 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 15:11:48,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 15:11:48,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:48,382 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 15:11:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 15:11:48,382 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-04-07 15:11:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 15:11:48,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140376177] [2022-04-07 15:11:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 15:11:48,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 15:11:48,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770679889] [2022-04-07 15:11:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 15:11:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 15:11:48,402 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) [2022-04-07 15:11:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 15:11:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-07 15:11:48,464 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-07 15:11:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-07 15:11:48,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-07 15:11:48,491 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-07 15:11:48,492 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 15:11:48,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 15:11:48,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 15:11:48,710 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-07 15:11:48,711 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-07 15:11:48,731 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L10-2 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: L13-2 has no Hoare annotation [2022-04-07 15:11:48,732 WARN L170 areAnnotationChecker]: assume_abort_if_notEXIT has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-3 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-3 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-4 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-4 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-1 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L33-1 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L45 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L34 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L34 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: L38-2 has no Hoare annotation [2022-04-07 15:11:48,733 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-07 15:11:48,734 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-07 15:11:48,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 03:11:48 BoogieIcfgContainer [2022-04-07 15:11:48,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 15:11:48,738 INFO L158 Benchmark]: Toolchain (without parser) took 3666.64ms. Allocated memory is still 194.0MB. Free memory was 143.1MB in the beginning and 76.2MB in the end (delta: 66.9MB). Peak memory consumption was 66.6MB. Max. memory is 8.0GB. [2022-04-07 15:11:48,739 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 194.0MB. Free memory is still 159.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 15:11:48,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.90ms. Allocated memory is still 194.0MB. Free memory was 142.9MB in the beginning and 172.8MB in the end (delta: -29.9MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. [2022-04-07 15:11:48,740 INFO L158 Benchmark]: Boogie Preprocessor took 22.01ms. Allocated memory is still 194.0MB. Free memory was 172.8MB in the beginning and 171.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-07 15:11:48,740 INFO L158 Benchmark]: RCFGBuilder took 327.44ms. Allocated memory is still 194.0MB. Free memory was 171.3MB in the beginning and 160.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-07 15:11:48,741 INFO L158 Benchmark]: TraceAbstraction took 3066.50ms. Allocated memory is still 194.0MB. Free memory was 159.5MB in the beginning and 76.2MB in the end (delta: 83.3MB). Peak memory consumption was 82.8MB. Max. memory is 8.0GB. [2022-04-07 15:11:48,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 194.0MB. Free memory is still 159.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 244.90ms. Allocated memory is still 194.0MB. Free memory was 142.9MB in the beginning and 172.8MB in the end (delta: -29.9MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.01ms. Allocated memory is still 194.0MB. Free memory was 172.8MB in the beginning and 171.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 327.44ms. Allocated memory is still 194.0MB. Free memory was 171.3MB in the beginning and 160.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3066.50ms. Allocated memory is still 194.0MB. Free memory was 159.5MB in the beginning and 76.2MB in the end (delta: 83.3MB). Peak memory consumption was 82.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=6, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=1, b=2, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=1, b=2, counter=0, x=1, y=2, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=1, counter++=0, x=1, y=2, z=0] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L38] COND FALSE !(y % 2 == 1) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=1, b=2, counter=1, x=2, y=1, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=2, counter++=1, x=2, y=1, z=0] [L33] COND FALSE !(counter++<1) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 261 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 161 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102 IncrementalHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 100 mSDtfsCounter, 102 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 155 SizeOfPredicates, 4 NumberOfNonLiveVariables, 263 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-07 15:11:48,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...