/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/hard-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:57:21,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:57:21,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:57:21,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:57:21,154 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 [2022-03-20 00:57:21,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:57:21,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:57:21,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:57:21,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:57:21,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:57:21,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:57:21,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:57:21,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:57:21,186 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:57:21,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:57:21,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:57:21,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:57:21,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:57:21,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:57:21,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:57:21,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:57:21,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:57:21,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:57:21,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:57:21,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:57:21,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:57:21,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:57:21,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:57:21,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:57:21,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:57:21,190 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:57:21,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:57:21,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:57:21,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:57:21,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:57:21,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:57:21,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:57:21,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:57:21,448 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:57:21,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2022-03-20 00:57:21,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af44bbdca/55b566dea17b48db921056c9fdb50a04/FLAG930a8c1ab [2022-03-20 00:57:21,897 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:57:21,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2022-03-20 00:57:21,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af44bbdca/55b566dea17b48db921056c9fdb50a04/FLAG930a8c1ab [2022-03-20 00:57:22,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af44bbdca/55b566dea17b48db921056c9fdb50a04 [2022-03-20 00:57:22,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:57:22,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:57:22,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:57:22,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:57:22,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:57:22,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76180dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22, skipping insertion in model container [2022-03-20 00:57:22,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:57:22,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:57:22,482 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/hard-ll_valuebound2.c[538,551] [2022-03-20 00:57:22,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:57:22,502 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:57:22,511 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/hard-ll_valuebound2.c[538,551] [2022-03-20 00:57:22,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:57:22,527 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:57:22,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22 WrapperNode [2022-03-20 00:57:22,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:57:22,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:57:22,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:57:22,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:57:22,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:57:22,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:57:22,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:57:22,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:57:22,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (1/1) ... [2022-03-20 00:57:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:57:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:22,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:57:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:57:22,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:57:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:57:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:57:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:57:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:57:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:57:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:57:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:57:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:57:22,672 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:57:22,674 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:57:22,770 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:57:22,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:57:22,775 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:57:22,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:57:22 BoogieIcfgContainer [2022-03-20 00:57:22,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:57:22,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:57:22,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:57:22,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:57:22,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:57:22" (1/3) ... [2022-03-20 00:57:22,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb85d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:57:22, skipping insertion in model container [2022-03-20 00:57:22,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:57:22" (2/3) ... [2022-03-20 00:57:22,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb85d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:57:22, skipping insertion in model container [2022-03-20 00:57:22,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:57:22" (3/3) ... [2022-03-20 00:57:22,784 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2022-03-20 00:57:22,788 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:57:22,788 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:57:22,825 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:57:22,831 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:57:22,831 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:57:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:57:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:57:22,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:22,858 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:22,859 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 00:57:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:22,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487198320] [2022-03-20 00:57:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:22,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:57:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:57:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:57:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:57:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:57:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487198320] [2022-03-20 00:57:23,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487198320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:57:23,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:57:23,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:57:23,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811417259] [2022-03-20 00:57:23,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:23,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:57:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:57:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:57:23,120 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:57:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:23,232 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 00:57:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:57:23,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 00:57:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:23,240 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:57:23,241 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 00:57:23,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:57:23,246 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:23,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:57:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 00:57:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 00:57:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:57:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 00:57:23,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 00:57:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:23,291 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 00:57:23,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:57:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 00:57:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:57:23,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:23,293 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:23,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:57:23,294 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 00:57:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830644758] [2022-03-20 00:57:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:57:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:57:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:57:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:57:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:57:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830644758] [2022-03-20 00:57:23,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830644758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:57:23,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:57:23,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:57:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827590467] [2022-03-20 00:57:23,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:23,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:57:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:57:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:57:23,489 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:57:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:23,710 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 00:57:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:57:23,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 00:57:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:23,718 INFO L225 Difference]: With dead ends: 46 [2022-03-20 00:57:23,722 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 00:57:23,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:57:23,725 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:23,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:57:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 00:57:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 00:57:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:57:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 00:57:23,743 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 00:57:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:23,744 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 00:57:23,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:57:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 00:57:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:57:23,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:23,746 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:23,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 00:57:23,747 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 00:57:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095531223] [2022-03-20 00:57:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:23,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:57:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:57:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:57:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:57:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 00:57:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:57:23,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:23,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095531223] [2022-03-20 00:57:23,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095531223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:57:23,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:57:23,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:57:23,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507469751] [2022-03-20 00:57:23,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:23,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:57:23,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:57:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:57:23,851 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:57:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:24,015 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 00:57:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:57:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:57:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:24,018 INFO L225 Difference]: With dead ends: 50 [2022-03-20 00:57:24,018 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 00:57:24,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:57:24,024 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:24,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:57:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 00:57:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 00:57:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:57:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 00:57:24,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 00:57:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:24,042 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 00:57:24,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:57:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 00:57:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 00:57:24,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:24,043 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:24,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 00:57:24,044 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 00:57:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:24,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782232974] [2022-03-20 00:57:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:24,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:24,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22302246] [2022-03-20 00:57:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:24,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:24,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:57:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 00:57:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 00:57:24,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:57:24,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782232974] [2022-03-20 00:57:24,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22302246] [2022-03-20 00:57:24,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22302246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:57:24,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:57:24,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 00:57:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927953360] [2022-03-20 00:57:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:24,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:57:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:57:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:57:24,342 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:57:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:24,447 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 00:57:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 00:57:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 00:57:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:24,449 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:57:24,449 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 00:57:24,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:57:24,450 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:24,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:57:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 00:57:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 00:57:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 00:57:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 00:57:24,460 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 00:57:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:24,460 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 00:57:24,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:57:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 00:57:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 00:57:24,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:24,461 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:24,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:24,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:24,684 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 00:57:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798982140] [2022-03-20 00:57:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:24,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:24,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503365295] [2022-03-20 00:57:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:24,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:24,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:24,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:57:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:57:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 00:57:25,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:57:25,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798982140] [2022-03-20 00:57:25,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503365295] [2022-03-20 00:57:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503365295] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:57:25,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:57:25,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:57:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935983053] [2022-03-20 00:57:25,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:25,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:57:25,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:57:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:57:25,280 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:57:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:25,341 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 00:57:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:57:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 00:57:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:25,345 INFO L225 Difference]: With dead ends: 68 [2022-03-20 00:57:25,345 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 00:57:25,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:57:25,346 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:25,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:57:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 00:57:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 00:57:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:57:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 00:57:25,368 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 00:57:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:25,369 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 00:57:25,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:57:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 00:57:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 00:57:25,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:25,384 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:25,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:25,584 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 00:57:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:25,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479491151] [2022-03-20 00:57:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:25,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868515183] [2022-03-20 00:57:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:25,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:25,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:25,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:57:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:25,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 00:57:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 00:57:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 00:57:26,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:26,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479491151] [2022-03-20 00:57:26,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:26,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868515183] [2022-03-20 00:57:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868515183] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:57:26,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:57:26,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:57:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817927062] [2022-03-20 00:57:26,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:26,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:57:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:57:26,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:57:26,098 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:57:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:26,147 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 00:57:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:57:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 00:57:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:26,149 INFO L225 Difference]: With dead ends: 76 [2022-03-20 00:57:26,149 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 00:57:26,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:57:26,150 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:26,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:57:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 00:57:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 00:57:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 00:57:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 00:57:26,166 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 00:57:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:26,167 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 00:57:26,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:57:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 00:57:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 00:57:26,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:26,169 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:26,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:26,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:26,388 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 00:57:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:26,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843885289] [2022-03-20 00:57:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:26,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:26,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194735988] [2022-03-20 00:57:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:26,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:26,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:26,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:26,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:57:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:57:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:57:26,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:57:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843885289] [2022-03-20 00:57:26,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194735988] [2022-03-20 00:57:26,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194735988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:57:26,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:57:26,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:57:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122659] [2022-03-20 00:57:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:57:26,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:57:26,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:57:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:57:26,577 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:57:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:26,631 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 00:57:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:57:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 00:57:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:26,634 INFO L225 Difference]: With dead ends: 79 [2022-03-20 00:57:26,634 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 00:57:26,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:57:26,635 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:26,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:57:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 00:57:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 00:57:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 00:57:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 00:57:26,645 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 00:57:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:26,645 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 00:57:26,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:57:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 00:57:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 00:57:26,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:26,646 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:26,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:26,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:26,869 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 00:57:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:26,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716350176] [2022-03-20 00:57:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:26,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:26,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230853937] [2022-03-20 00:57:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:26,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:26,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:26,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:57:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 00:57:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-03-20 00:57:27,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:56,802 WARN L232 SmtUtils]: Spent 17.72s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:01,079 WARN L232 SmtUtils]: Spent 27.93s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 00:59:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716350176] [2022-03-20 00:59:57,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230853937] [2022-03-20 00:59:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230853937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:57,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:57,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-03-20 00:59:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329594362] [2022-03-20 00:59:57,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:57,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 00:59:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 00:59:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=342, Unknown=2, NotChecked=0, Total=420 [2022-03-20 00:59:57,327 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 18 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 01:00:01,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:00:12,360 WARN L232 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 71 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:00:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:17,665 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2022-03-20 01:00:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 01:00:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 18 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 75 [2022-03-20 01:00:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:17,667 INFO L225 Difference]: With dead ends: 148 [2022-03-20 01:00:17,667 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 01:00:17,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=188, Invalid=801, Unknown=3, NotChecked=0, Total=992 [2022-03-20 01:00:17,670 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 168 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:17,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 338 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 529 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 01:00:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 01:00:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2022-03-20 01:00:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 01:00:17,685 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-03-20 01:00:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:17,686 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 01:00:17,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 18 states have internal predecessors, (39), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 01:00:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 01:00:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 01:00:17,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:17,687 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:17,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:17,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:17,906 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 01:00:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:17,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233164327] [2022-03-20 01:00:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:17,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:17,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023385392] [2022-03-20 01:00:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:17,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:17,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:17,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 01:00:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:00:17,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 01:00:18,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 01:00:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233164327] [2022-03-20 01:00:18,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023385392] [2022-03-20 01:00:18,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023385392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:18,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:18,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 01:00:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816565234] [2022-03-20 01:00:18,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:18,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 01:00:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 01:00:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 01:00:18,453 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 01:00:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:18,611 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-03-20 01:00:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:00:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 01:00:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:18,616 INFO L225 Difference]: With dead ends: 116 [2022-03-20 01:00:18,616 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 01:00:18,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:00:18,617 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:18,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 193 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:00:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 01:00:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-03-20 01:00:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 01:00:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-03-20 01:00:18,646 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-03-20 01:00:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:18,647 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-03-20 01:00:18,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 01:00:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-03-20 01:00:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 01:00:18,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:18,648 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 01:00:18,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:18,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:18,872 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1353450239, now seen corresponding path program 2 times [2022-03-20 01:00:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795727293] [2022-03-20 01:00:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:18,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231164968] [2022-03-20 01:00:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:00:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:18,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:18,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:18,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 01:00:18,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:00:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:00:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:00:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 01:00:19,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 01:00:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795727293] [2022-03-20 01:00:19,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231164968] [2022-03-20 01:00:19,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231164968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:19,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:19,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 01:00:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94718803] [2022-03-20 01:00:19,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:19,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:00:19,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:00:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:19,244 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 01:00:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:19,296 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-20 01:00:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 01:00:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-03-20 01:00:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:19,298 INFO L225 Difference]: With dead ends: 130 [2022-03-20 01:00:19,298 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 01:00:19,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:19,299 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:19,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:00:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 01:00:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 01:00:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 01:00:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-03-20 01:00:19,313 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-03-20 01:00:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:19,313 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-03-20 01:00:19,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 01:00:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-03-20 01:00:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 01:00:19,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:19,315 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:19,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:19,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:19,528 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1550260511, now seen corresponding path program 1 times [2022-03-20 01:00:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524747622] [2022-03-20 01:00:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:19,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:19,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744653033] [2022-03-20 01:00:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:19,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:19,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:19,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 01:00:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 01:00:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 01:00:19,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 01:00:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:20,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524747622] [2022-03-20 01:00:20,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:20,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744653033] [2022-03-20 01:00:20,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744653033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:20,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:20,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 01:00:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601594525] [2022-03-20 01:00:20,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:20,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 01:00:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 01:00:20,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:00:20,239 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:00:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:20,478 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2022-03-20 01:00:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 01:00:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-20 01:00:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:20,479 INFO L225 Difference]: With dead ends: 119 [2022-03-20 01:00:20,479 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 01:00:20,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 01:00:20,480 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:20,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 366 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:00:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 01:00:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 01:00:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 01:00:20,492 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-03-20 01:00:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:20,492 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 01:00:20,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:00:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 01:00:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 01:00:20,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:20,493 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:20,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:20,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 01:00:20,695 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -941589367, now seen corresponding path program 1 times [2022-03-20 01:00:20,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:20,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187421496] [2022-03-20 01:00:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:20,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:20,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324473896] [2022-03-20 01:00:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:20,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 01:00:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 01:00:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 01:00:20,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:00:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187421496] [2022-03-20 01:00:20,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324473896] [2022-03-20 01:00:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324473896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:00:20,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:00:20,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:00:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520815316] [2022-03-20 01:00:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:00:20,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:00:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:00:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:20,913 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 01:00:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:20,958 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-03-20 01:00:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:00:20,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-03-20 01:00:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:20,960 INFO L225 Difference]: With dead ends: 116 [2022-03-20 01:00:20,960 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 01:00:20,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:20,961 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:20,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:00:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 01:00:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 01:00:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-03-20 01:00:20,975 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-03-20 01:00:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:20,975 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-03-20 01:00:20,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 01:00:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-03-20 01:00:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 01:00:20,977 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:20,977 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:21,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:21,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:21,199 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 3 times [2022-03-20 01:00:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058936172] [2022-03-20 01:00:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:21,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:21,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527618843] [2022-03-20 01:00:21,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 01:00:21,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:21,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:21,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:21,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 01:00:21,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 01:00:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:00:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 01:00:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates...