/usr/bin/java -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/cohencu-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 12:19:46,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 12:19:46,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 12:19:46,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 12:19:46,535 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 [2022-02-23 12:19:46,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 12:19:46,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 12:19:46,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 12:19:46,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 12:19:46,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 12:19:46,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 12:19:46,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 12:19:46,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 12:19:46,557 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 12:19:46,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 12:19:46,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 12:19:46,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 12:19:46,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:19:46,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 12:19:46,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 12:19:46,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 12:19:46,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 12:19:46,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 12:19:46,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 12:19:46,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 12:19:46,712 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 12:19:46,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-02-23 12:19:46,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2c2c745/9daefdc5a9f14194bd60022883a2f3c7/FLAGf56e106a3 [2022-02-23 12:19:47,117 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 12:19:47,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-02-23 12:19:47,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2c2c745/9daefdc5a9f14194bd60022883a2f3c7/FLAGf56e106a3 [2022-02-23 12:19:47,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2c2c745/9daefdc5a9f14194bd60022883a2f3c7 [2022-02-23 12:19:47,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 12:19:47,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 12:19:47,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 12:19:47,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 12:19:47,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 12:19:47,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e3916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47, skipping insertion in model container [2022-02-23 12:19:47,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 12:19:47,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 12:19:47,295 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/cohencu-ll_unwindbound100.c[588,601] [2022-02-23 12:19:47,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:19:47,349 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 12:19:47,358 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/cohencu-ll_unwindbound100.c[588,601] [2022-02-23 12:19:47,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:19:47,381 INFO L208 MainTranslator]: Completed translation [2022-02-23 12:19:47,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47 WrapperNode [2022-02-23 12:19:47,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 12:19:47,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 12:19:47,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 12:19:47,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 12:19:47,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 12:19:47,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 12:19:47,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 12:19:47,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 12:19:47,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (1/1) ... [2022-02-23 12:19:47,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:19:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:47,439 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) [2022-02-23 12:19:47,441 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 [2022-02-23 12:19:47,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 12:19:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 12:19:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 12:19:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 12:19:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 12:19:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 12:19:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 12:19:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 12:19:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 12:19:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 12:19:47,523 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 12:19:47,524 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 12:19:47,610 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 12:19:47,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 12:19:47,618 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 12:19:47,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:19:47 BoogieIcfgContainer [2022-02-23 12:19:47,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 12:19:47,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 12:19:47,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 12:19:47,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 12:19:47,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 12:19:47" (1/3) ... [2022-02-23 12:19:47,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fc780b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:19:47, skipping insertion in model container [2022-02-23 12:19:47,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:19:47" (2/3) ... [2022-02-23 12:19:47,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fc780b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:19:47, skipping insertion in model container [2022-02-23 12:19:47,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:19:47" (3/3) ... [2022-02-23 12:19:47,626 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2022-02-23 12:19:47,629 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 12:19:47,630 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 12:19:47,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 12:19:47,668 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 12:19:47,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 12:19:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 12:19:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 12:19:47,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:47,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:47,683 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:47,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 1 times [2022-02-23 12:19:47,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:47,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954920264] [2022-02-23 12:19:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:47,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 12:19:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:19:47,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:47,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954920264] [2022-02-23 12:19:47,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954920264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:47,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:47,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 12:19:47,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462623612] [2022-02-23 12:19:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:47,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 12:19:47,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 12:19:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 12:19:47,932 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:48,052 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2022-02-23 12:19:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 12:19:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 12:19:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:48,059 INFO L225 Difference]: With dead ends: 57 [2022-02-23 12:19:48,059 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 12:19:48,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 12:19:48,067 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:48,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 12:19:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-02-23 12:19:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 12:19:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-02-23 12:19:48,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-02-23 12:19:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:48,106 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-02-23 12:19:48,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-02-23 12:19:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 12:19:48,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:48,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:48,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 12:19:48,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 1 times [2022-02-23 12:19:48,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:48,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402320602] [2022-02-23 12:19:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:48,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 12:19:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:19:48,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:48,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402320602] [2022-02-23 12:19:48,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402320602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:48,225 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:48,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 12:19:48,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602554145] [2022-02-23 12:19:48,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:48,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:19:48,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:48,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:19:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:19:48,227 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:48,329 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-02-23 12:19:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 12:19:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 12:19:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:48,331 INFO L225 Difference]: With dead ends: 40 [2022-02-23 12:19:48,331 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 12:19:48,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:19:48,335 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:48,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 12:19:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-23 12:19:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 12:19:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-02-23 12:19:48,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-02-23 12:19:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:48,351 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-02-23 12:19:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-02-23 12:19:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 12:19:48,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:48,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:48,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 12:19:48,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 1 times [2022-02-23 12:19:48,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:48,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137088344] [2022-02-23 12:19:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:48,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 12:19:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:19:48,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:48,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137088344] [2022-02-23 12:19:48,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137088344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:48,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:48,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 12:19:48,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459815796] [2022-02-23 12:19:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:48,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 12:19:48,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 12:19:48,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:19:48,456 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:48,561 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-02-23 12:19:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 12:19:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 12:19:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:48,562 INFO L225 Difference]: With dead ends: 34 [2022-02-23 12:19:48,562 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 12:19:48,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:19:48,563 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:48,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 12:19:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 12:19:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 12:19:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-23 12:19:48,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-02-23 12:19:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:48,570 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-23 12:19:48,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 12:19:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-23 12:19:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 12:19:48,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:48,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:48,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 12:19:48,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 1 times [2022-02-23 12:19:48,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:48,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534656802] [2022-02-23 12:19:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:48,581 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:48,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907003572] [2022-02-23 12:19:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:48,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:48,588 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) [2022-02-23 12:19:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 12:19:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:48,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:19:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:19:48,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:19:48,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:48,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534656802] [2022-02-23 12:19:48,739 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:48,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907003572] [2022-02-23 12:19:48,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907003572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:48,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:48,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:19:48,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650586626] [2022-02-23 12:19:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:19:48,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:19:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:19:48,741 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 12:19:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:48,808 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2022-02-23 12:19:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:19:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-23 12:19:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:48,811 INFO L225 Difference]: With dead ends: 50 [2022-02-23 12:19:48,811 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 12:19:48,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:19:48,819 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:48,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:19:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 12:19:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-02-23 12:19:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 12:19:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-02-23 12:19:48,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-02-23 12:19:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:48,827 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-02-23 12:19:48,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 12:19:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-02-23 12:19:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 12:19:48,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:48,828 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:48,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:49,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1612678773, now seen corresponding path program 1 times [2022-02-23 12:19:49,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:49,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714652786] [2022-02-23 12:19:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:49,052 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:49,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967215944] [2022-02-23 12:19:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:49,053 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) [2022-02-23 12:19:49,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 12:19:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:19:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 12:19:49,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:19:49,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:49,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714652786] [2022-02-23 12:19:49,151 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:49,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967215944] [2022-02-23 12:19:49,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967215944] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:49,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:49,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:19:49,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626059114] [2022-02-23 12:19:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:49,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:19:49,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:19:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:19:49,153 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 12:19:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:49,187 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-02-23 12:19:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:19:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 12:19:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:49,188 INFO L225 Difference]: With dead ends: 54 [2022-02-23 12:19:49,188 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 12:19:49,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:19:49,189 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:49,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 159 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:19:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 12:19:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-02-23 12:19:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 12:19:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-02-23 12:19:49,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-02-23 12:19:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:49,197 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-02-23 12:19:49,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 12:19:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-02-23 12:19:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 12:19:49,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:49,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:49,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:49,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1625830715, now seen corresponding path program 1 times [2022-02-23 12:19:49,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:49,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726230007] [2022-02-23 12:19:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:49,422 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:49,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470310294] [2022-02-23 12:19:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:49,423 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) [2022-02-23 12:19:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 12:19:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:19:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 12:19:49,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:19:49,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:49,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726230007] [2022-02-23 12:19:49,527 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:49,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470310294] [2022-02-23 12:19:49,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470310294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:19:49,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:19:49,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:19:49,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631274063] [2022-02-23 12:19:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:19:49,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:19:49,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:19:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:19:49,529 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 12:19:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:49,570 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-02-23 12:19:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:19:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-02-23 12:19:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:49,571 INFO L225 Difference]: With dead ends: 62 [2022-02-23 12:19:49,571 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 12:19:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:19:49,572 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:19:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 12:19:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-23 12:19:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 12:19:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-02-23 12:19:49,577 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-02-23 12:19:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-02-23 12:19:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 12:19:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-02-23 12:19:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 12:19:49,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:49,578 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-02-23 12:19:49,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:49,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,782 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1440923632, now seen corresponding path program 1 times [2022-02-23 12:19:49,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:49,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196709676] [2022-02-23 12:19:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:49,793 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:49,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180798451] [2022-02-23 12:19:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:49,796 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) [2022-02-23 12:19:49,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 12:19:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:19:49,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-23 12:19:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 12:19:50,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:50,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196709676] [2022-02-23 12:19:50,001 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:50,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180798451] [2022-02-23 12:19:50,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180798451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:50,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:50,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 12:19:50,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179437298] [2022-02-23 12:19:50,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:50,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:19:50,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:19:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:19:50,003 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 12:19:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:50,093 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2022-02-23 12:19:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 12:19:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-02-23 12:19:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:50,094 INFO L225 Difference]: With dead ends: 120 [2022-02-23 12:19:50,094 INFO L226 Difference]: Without dead ends: 104 [2022-02-23 12:19:50,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:19:50,113 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:50,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 238 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-23 12:19:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-02-23 12:19:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 12:19:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-02-23 12:19:50,138 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 45 [2022-02-23 12:19:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:50,138 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-02-23 12:19:50,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 12:19:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-02-23 12:19:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 12:19:50,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:50,142 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:50,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:50,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:50,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1933038948, now seen corresponding path program 1 times [2022-02-23 12:19:50,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:50,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967115891] [2022-02-23 12:19:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:50,368 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:50,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537565250] [2022-02-23 12:19:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:50,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:50,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:50,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 12:19:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 12:19:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 12:19:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 12:19:50,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:50,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967115891] [2022-02-23 12:19:50,691 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:50,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537565250] [2022-02-23 12:19:50,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537565250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:50,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:50,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 12:19:50,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712970593] [2022-02-23 12:19:50,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:50,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:19:50,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:19:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:19:50,693 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 12:19:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:51,068 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-02-23 12:19:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 12:19:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-02-23 12:19:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:51,070 INFO L225 Difference]: With dead ends: 118 [2022-02-23 12:19:51,070 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 12:19:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:19:51,071 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 12:19:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 12:19:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-02-23 12:19:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 12:19:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-02-23 12:19:51,084 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 45 [2022-02-23 12:19:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:51,085 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-02-23 12:19:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 12:19:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-02-23 12:19:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 12:19:51,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:51,086 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:51,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:51,300 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 780782572, now seen corresponding path program 2 times [2022-02-23 12:19:51,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:51,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482415768] [2022-02-23 12:19:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:51,307 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:51,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426833934] [2022-02-23 12:19:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 12:19:51,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:51,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 12:19:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 12:19:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:19:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 12:19:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 12:19:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 12:19:51,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:51,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482415768] [2022-02-23 12:19:51,603 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:51,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426833934] [2022-02-23 12:19:51,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426833934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:51,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:51,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 12:19:51,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264879602] [2022-02-23 12:19:51,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:51,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:19:51,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:19:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:19:51,605 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 12:19:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:51,702 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2022-02-23 12:19:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 12:19:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-02-23 12:19:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:51,721 INFO L225 Difference]: With dead ends: 122 [2022-02-23 12:19:51,721 INFO L226 Difference]: Without dead ends: 120 [2022-02-23 12:19:51,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-23 12:19:51,722 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:51,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 263 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-23 12:19:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-23 12:19:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 12:19:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2022-02-23 12:19:51,757 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 50 [2022-02-23 12:19:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:51,757 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2022-02-23 12:19:51,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 12:19:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2022-02-23 12:19:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 12:19:51,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:51,758 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:51,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:51,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:51,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1909341660, now seen corresponding path program 3 times [2022-02-23 12:19:51,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:51,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171389282] [2022-02-23 12:19:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:51,978 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:51,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987042337] [2022-02-23 12:19:51,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 12:19:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:51,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:51,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 12:19:52,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 12:19:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:19:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 12:19:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 12:19:52,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 12:19:52,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:52,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171389282] [2022-02-23 12:19:52,410 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:52,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987042337] [2022-02-23 12:19:52,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987042337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:52,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:52,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 12:19:52,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032920088] [2022-02-23 12:19:52,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:52,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:19:52,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:19:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:19:52,412 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 12:19:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:52,731 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2022-02-23 12:19:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 12:19:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-02-23 12:19:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:52,733 INFO L225 Difference]: With dead ends: 146 [2022-02-23 12:19:52,733 INFO L226 Difference]: Without dead ends: 135 [2022-02-23 12:19:52,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:19:52,734 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:52,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 168 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 12:19:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-23 12:19:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-23 12:19:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-23 12:19:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-02-23 12:19:52,745 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 55 [2022-02-23 12:19:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:52,745 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-02-23 12:19:52,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 12:19:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-02-23 12:19:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-23 12:19:52,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:52,746 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:52,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:52,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:52,960 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1284663070, now seen corresponding path program 1 times [2022-02-23 12:19:52,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:52,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141050381] [2022-02-23 12:19:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:52,966 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:52,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354719612] [2022-02-23 12:19:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:52,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:52,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 12:19:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 12:19:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 12:19:53,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 12:19:53,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:53,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141050381] [2022-02-23 12:19:53,946 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:53,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354719612] [2022-02-23 12:19:53,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354719612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:53,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:53,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 12:19:53,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672476946] [2022-02-23 12:19:53,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 12:19:53,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 12:19:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:19:53,949 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 12:19:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:54,198 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2022-02-23 12:19:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 12:19:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-02-23 12:19:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:54,200 INFO L225 Difference]: With dead ends: 148 [2022-02-23 12:19:54,200 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 12:19:54,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:19:54,200 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:54,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 254 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 12:19:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-02-23 12:19:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.069767441860465) internal successors, (92), 88 states have internal predecessors, (92), 31 states have call successors, (31), 25 states have call predecessors, (31), 23 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-23 12:19:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2022-02-23 12:19:54,228 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 71 [2022-02-23 12:19:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:54,228 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2022-02-23 12:19:54,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 12:19:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2022-02-23 12:19:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-23 12:19:54,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:54,243 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:54,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 12:19:54,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 12:19:54,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -904350414, now seen corresponding path program 1 times [2022-02-23 12:19:54,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:54,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732054270] [2022-02-23 12:19:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:54,451 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:54,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078686015] [2022-02-23 12:19:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:54,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:54,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:54,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:54,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 12:19:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:19:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 12:19:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-23 12:19:54,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:54,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:54,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732054270] [2022-02-23 12:19:54,996 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:54,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078686015] [2022-02-23 12:19:54,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078686015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:19:54,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:19:54,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 12:19:54,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267037603] [2022-02-23 12:19:54,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:54,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 12:19:54,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 12:19:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:19:54,998 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 12:19:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:55,075 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-02-23 12:19:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 12:19:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-02-23 12:19:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:55,077 INFO L225 Difference]: With dead ends: 143 [2022-02-23 12:19:55,077 INFO L226 Difference]: Without dead ends: 132 [2022-02-23 12:19:55,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-23 12:19:55,077 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:55,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 229 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:19:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-23 12:19:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-23 12:19:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 23 states have call predecessors, (28), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 12:19:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2022-02-23 12:19:55,088 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 76 [2022-02-23 12:19:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:55,088 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2022-02-23 12:19:55,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 12:19:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2022-02-23 12:19:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-23 12:19:55,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:55,089 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:55,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:55,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:55,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1454229731, now seen corresponding path program 4 times [2022-02-23 12:19:55,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:55,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714412888] [2022-02-23 12:19:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:55,315 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:55,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145568538] [2022-02-23 12:19:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 12:19:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:55,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:55,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 12:19:57,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 12:19:57,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:19:57,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-23 12:19:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 104 proven. 43 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-02-23 12:19:57,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-02-23 12:19:58,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:58,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714412888] [2022-02-23 12:19:58,238 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:58,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145568538] [2022-02-23 12:19:58,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145568538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:19:58,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:19:58,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2022-02-23 12:19:58,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722520548] [2022-02-23 12:19:58,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:58,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 12:19:58,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 12:19:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:19:58,240 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-23 12:19:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:58,342 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-02-23 12:19:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 12:19:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 78 [2022-02-23 12:19:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:58,343 INFO L225 Difference]: With dead ends: 142 [2022-02-23 12:19:58,343 INFO L226 Difference]: Without dead ends: 138 [2022-02-23 12:19:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-23 12:19:58,344 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:58,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-23 12:19:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-02-23 12:19:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 28 states have call successors, (28), 25 states have call predecessors, (28), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 12:19:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2022-02-23 12:19:58,356 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 78 [2022-02-23 12:19:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2022-02-23 12:19:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-23 12:19:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2022-02-23 12:19:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-23 12:19:58,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:58,357 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:58,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:58,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 12:19:58,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1446042473, now seen corresponding path program 2 times [2022-02-23 12:19:58,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:58,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584174352] [2022-02-23 12:19:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:58,574 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:58,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028260076] [2022-02-23 12:19:58,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 12:19:58,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:58,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 12:19:58,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 12:19:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:19:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 12:19:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-23 12:19:58,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:19:59,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:19:59,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584174352] [2022-02-23 12:19:59,050 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:19:59,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028260076] [2022-02-23 12:19:59,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028260076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:19:59,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:19:59,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 12:19:59,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698912644] [2022-02-23 12:19:59,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:19:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:19:59,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:19:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:19:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:19:59,051 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 12:19:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:19:59,159 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-02-23 12:19:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 12:19:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2022-02-23 12:19:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:19:59,160 INFO L225 Difference]: With dead ends: 140 [2022-02-23 12:19:59,160 INFO L226 Difference]: Without dead ends: 129 [2022-02-23 12:19:59,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-23 12:19:59,160 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:19:59,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 277 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:19:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-23 12:19:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-02-23 12:19:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 25 states have call successors, (25), 23 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 12:19:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-02-23 12:19:59,173 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 104 [2022-02-23 12:19:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:19:59,175 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-02-23 12:19:59,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 12:19:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-02-23 12:19:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-23 12:19:59,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:19:59,176 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:19:59,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 12:19:59,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 12:19:59,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:19:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:19:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -813840784, now seen corresponding path program 2 times [2022-02-23 12:19:59,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:19:59,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56174780] [2022-02-23 12:19:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:19:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:19:59,397 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:19:59,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40245387] [2022-02-23 12:19:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 12:19:59,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:19:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:19:59,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:19:59,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 12:19:59,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 12:19:59,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:19:59,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-23 12:19:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:19:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-02-23 12:19:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:20:00,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:20:00,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56174780] [2022-02-23 12:20:00,086 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:20:00,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40245387] [2022-02-23 12:20:00,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40245387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:20:00,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:20:00,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 12:20:00,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201945922] [2022-02-23 12:20:00,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:20:00,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 12:20:00,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:20:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 12:20:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-23 12:20:00,088 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-02-23 12:20:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:20:00,246 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-02-23 12:20:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 12:20:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 127 [2022-02-23 12:20:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:20:00,249 INFO L225 Difference]: With dead ends: 152 [2022-02-23 12:20:00,249 INFO L226 Difference]: Without dead ends: 150 [2022-02-23 12:20:00,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:20:00,251 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:20:00,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 371 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:20:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-23 12:20:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-02-23 12:20:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.043956043956044) internal successors, (95), 93 states have internal predecessors, (95), 32 states have call successors, (32), 26 states have call predecessors, (32), 25 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-23 12:20:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2022-02-23 12:20:00,284 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 127 [2022-02-23 12:20:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:20:00,284 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2022-02-23 12:20:00,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-02-23 12:20:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2022-02-23 12:20:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-23 12:20:00,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:20:00,285 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:20:00,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 12:20:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 12:20:00,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:20:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:20:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash -167438485, now seen corresponding path program 2 times [2022-02-23 12:20:00,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:20:00,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779699093] [2022-02-23 12:20:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:20:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:20:00,502 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:20:00,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243512448] [2022-02-23 12:20:00,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 12:20:00,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:20:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:20:00,503 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:20:00,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 12:20:00,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 12:20:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:20:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 12:20:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:20:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-02-23 12:20:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:20:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-02-23 12:20:00,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:20:00,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779699093] [2022-02-23 12:20:00,966 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:20:00,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243512448] [2022-02-23 12:20:00,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243512448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:20:00,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:20:00,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 12:20:00,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024205728] [2022-02-23 12:20:00,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:20:00,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 12:20:00,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:20:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 12:20:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:20:00,967 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2022-02-23 12:20:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:20:01,303 INFO L93 Difference]: Finished difference Result 368 states and 388 transitions. [2022-02-23 12:20:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 12:20:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) Word has length 129 [2022-02-23 12:20:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:20:01,305 INFO L225 Difference]: With dead ends: 368 [2022-02-23 12:20:01,305 INFO L226 Difference]: Without dead ends: 353 [2022-02-23 12:20:01,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 12:20:01,308 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 156 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 12:20:01,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 355 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 12:20:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-23 12:20:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 311. [2022-02-23 12:20:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 200 states have internal predecessors, (203), 63 states have call successors, (63), 55 states have call predecessors, (63), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-02-23 12:20:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 326 transitions. [2022-02-23 12:20:01,336 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 326 transitions. Word has length 129 [2022-02-23 12:20:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:20:01,336 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 326 transitions. [2022-02-23 12:20:01,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2022-02-23 12:20:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 326 transitions. [2022-02-23 12:20:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-23 12:20:01,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:20:01,337 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:20:01,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 12:20:01,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 12:20:01,543 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:20:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:20:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 173938976, now seen corresponding path program 3 times [2022-02-23 12:20:01,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:20:01,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596208507] [2022-02-23 12:20:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:20:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:20:01,550 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:20:01,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037787666] [2022-02-23 12:20:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 12:20:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:20:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:20:01,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:20:01,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 12:20:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 12:20:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:20:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 12:20:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:20:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-02-23 12:20:02,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:20:02,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:20:02,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596208507] [2022-02-23 12:20:02,650 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:20:02,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037787666] [2022-02-23 12:20:02,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037787666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:20:02,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:20:02,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 12:20:02,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859777137] [2022-02-23 12:20:02,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:20:02,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 12:20:02,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:20:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 12:20:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-23 12:20:02,651 INFO L87 Difference]: Start difference. First operand 311 states and 326 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-02-23 12:20:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:20:02,809 INFO L93 Difference]: Finished difference Result 313 states and 327 transitions. [2022-02-23 12:20:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 12:20:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2022-02-23 12:20:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:20:02,812 INFO L225 Difference]: With dead ends: 313 [2022-02-23 12:20:02,812 INFO L226 Difference]: Without dead ends: 302 [2022-02-23 12:20:02,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:20:02,813 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:20:02,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 372 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:20:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-23 12:20:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-02-23 12:20:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 189 states have (on average 1.0423280423280423) internal successors, (197), 195 states have internal predecessors, (197), 60 states have call successors, (60), 53 states have call predecessors, (60), 52 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-02-23 12:20:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 315 transitions. [2022-02-23 12:20:02,840 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 315 transitions. Word has length 132 [2022-02-23 12:20:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:20:02,840 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 315 transitions. [2022-02-23 12:20:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-02-23 12:20:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 315 transitions. [2022-02-23 12:20:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-23 12:20:02,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:20:02,842 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:20:02,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 12:20:03,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:20:03,047 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:20:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:20:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1020857049, now seen corresponding path program 3 times [2022-02-23 12:20:03,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:20:03,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143787679] [2022-02-23 12:20:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:20:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:20:03,053 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:20:03,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101810558] [2022-02-23 12:20:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 12:20:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:20:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:20:03,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:20:03,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 12:20:03,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 12:20:03,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:20:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 12:20:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:20:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-02-23 12:20:03,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:20:05,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:20:05,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143787679] [2022-02-23 12:20:05,817 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:20:05,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101810558] [2022-02-23 12:20:05,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101810558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:20:05,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:20:05,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 12:20:05,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574351936] [2022-02-23 12:20:05,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:20:05,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 12:20:05,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:20:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 12:20:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90 [2022-02-23 12:20:05,818 INFO L87 Difference]: Start difference. First operand 302 states and 315 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-23 12:20:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:20:07,142 INFO L93 Difference]: Finished difference Result 311 states and 325 transitions. [2022-02-23 12:20:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 12:20:07,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 155 [2022-02-23 12:20:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:20:07,144 INFO L225 Difference]: With dead ends: 311 [2022-02-23 12:20:07,144 INFO L226 Difference]: Without dead ends: 309 [2022-02-23 12:20:07,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=37, Invalid=118, Unknown=1, NotChecked=0, Total=156 [2022-02-23 12:20:07,145 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 12:20:07,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 164 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-23 12:20:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-23 12:20:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2022-02-23 12:20:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 192 states have (on average 1.0416666666666667) internal successors, (200), 199 states have internal predecessors, (200), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 54 states have call predecessors, (60), 60 states have call successors, (60) [2022-02-23 12:20:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 322 transitions. [2022-02-23 12:20:07,171 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 322 transitions. Word has length 155 [2022-02-23 12:20:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:20:07,172 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 322 transitions. [2022-02-23 12:20:07,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-23 12:20:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 322 transitions. [2022-02-23 12:20:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-23 12:20:07,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:20:07,173 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:20:07,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 12:20:07,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 12:20:07,378 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:20:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:20:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2056924759, now seen corresponding path program 4 times [2022-02-23 12:20:07,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:20:07,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491260478] [2022-02-23 12:20:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:20:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:20:07,388 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:20:07,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545664466] [2022-02-23 12:20:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 12:20:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:20:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:20:07,390 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:20:07,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 12:20:09,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 12:20:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:20:09,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 76 conjunts are in the unsatisfiable core [2022-02-23 12:20:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates...