/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/ps6-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 02:17:50,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 02:17:50,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 02:17:51,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 02:17:51,088 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 02:17:51,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 02:17:51,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 02:17:51,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 02:17:51,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 02:17:51,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 02:17:51,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 02:17:51,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 02:17:51,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 02:17:51,120 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 02:17:51,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 02:17:51,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 02:17:51,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 02:17:51,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 02:17:51,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 02:17:51,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 02:17:51,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 02:17:51,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 02:17:51,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 02:17:51,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:17:51,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 02:17:51,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 02:17:51,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 02:17:51,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 02:17:51,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 02:17:51,125 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 02:17:51,125 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 02:17:51,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 02:17:51,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 02:17:51,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 02:17:51,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 02:17:51,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 02:17:51,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 02:17:51,364 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 02:17:51,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-20 02:17:51,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eff3ced0/d31165bcb86b42e5b2c0376cebabd711/FLAGf98c92319 [2022-03-20 02:17:51,789 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 02:17:51,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-20 02:17:51,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eff3ced0/d31165bcb86b42e5b2c0376cebabd711/FLAGf98c92319 [2022-03-20 02:17:52,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eff3ced0/d31165bcb86b42e5b2c0376cebabd711 [2022-03-20 02:17:52,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 02:17:52,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 02:17:52,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 02:17:52,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 02:17:52,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 02:17:52,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38582afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52, skipping insertion in model container [2022-03-20 02:17:52,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 02:17:52,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 02:17:52,408 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/ps6-ll_unwindbound100.c[458,471] [2022-03-20 02:17:52,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:17:52,432 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 02:17:52,441 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/ps6-ll_unwindbound100.c[458,471] [2022-03-20 02:17:52,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:17:52,457 INFO L208 MainTranslator]: Completed translation [2022-03-20 02:17:52,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52 WrapperNode [2022-03-20 02:17:52,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 02:17:52,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 02:17:52,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 02:17:52,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 02:17:52,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 02:17:52,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 02:17:52,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 02:17:52,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 02:17:52,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (1/1) ... [2022-03-20 02:17:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:17:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:52,520 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 02:17:52,535 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 02:17:52,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 02:17:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 02:17:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 02:17:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 02:17:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 02:17:52,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 02:17:52,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 02:17:52,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 02:17:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 02:17:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 02:17:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 02:17:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 02:17:52,604 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 02:17:52,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 02:17:52,705 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 02:17:52,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 02:17:52,718 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 02:17:52,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:17:52 BoogieIcfgContainer [2022-03-20 02:17:52,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 02:17:52,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 02:17:52,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 02:17:52,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 02:17:52,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:17:52" (1/3) ... [2022-03-20 02:17:52,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a28d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:17:52, skipping insertion in model container [2022-03-20 02:17:52,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:17:52" (2/3) ... [2022-03-20 02:17:52,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a28d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:17:52, skipping insertion in model container [2022-03-20 02:17:52,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:17:52" (3/3) ... [2022-03-20 02:17:52,732 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.c [2022-03-20 02:17:52,738 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 02:17:52,738 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 02:17:52,783 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 02:17:52,789 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 02:17:52,789 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 02:17:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:17:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 02:17:52,806 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:52,811 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:52,812 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:52,817 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2022-03-20 02:17:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492896581] [2022-03-20 02:17:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:52,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:17:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:17:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492896581] [2022-03-20 02:17:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492896581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:17:52,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:17:52,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 02:17:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606819345] [2022-03-20 02:17:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:17:52,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 02:17:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 02:17:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:17:53,025 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 02:17:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:53,138 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-20 02:17:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 02:17:53,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 02:17:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:53,145 INFO L225 Difference]: With dead ends: 50 [2022-03-20 02:17:53,145 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 02:17:53,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:17:53,150 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:53,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:17:53,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 02:17:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 02:17:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 02:17:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 02:17:53,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-20 02:17:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:53,181 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 02:17:53,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 02:17:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 02:17:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 02:17:53,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:53,183 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:53,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 02:17:53,184 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2022-03-20 02:17:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71509307] [2022-03-20 02:17:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:53,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:53,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:53,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362719409] [2022-03-20 02:17:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:53,207 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 02:17:53,213 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 02:17:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 02:17:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:53,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:17:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:53,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71509307] [2022-03-20 02:17:53,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362719409] [2022-03-20 02:17:53,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362719409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:17:53,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:17:53,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 02:17:53,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369798714] [2022-03-20 02:17:53,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:17:53,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 02:17:53,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 02:17:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 02:17:53,388 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:17:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:53,409 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 02:17:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 02:17:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 02:17:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:53,416 INFO L225 Difference]: With dead ends: 34 [2022-03-20 02:17:53,419 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 02:17:53,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 02:17:53,421 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:53,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:17:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 02:17:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 02:17:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 02:17:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-20 02:17:53,429 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-20 02:17:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:53,430 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-20 02:17:53,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:17:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-20 02:17:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 02:17:53,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:53,431 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:53,451 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 02:17:53,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:53,636 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2022-03-20 02:17:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:53,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133598012] [2022-03-20 02:17:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:53,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826348446] [2022-03-20 02:17:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:53,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:53,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:53,653 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 02:17:53,675 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 02:17:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:17:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:53,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:17:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133598012] [2022-03-20 02:17:53,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:53,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826348446] [2022-03-20 02:17:53,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826348446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:17:53,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:17:53,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:17:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968893473] [2022-03-20 02:17:53,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:17:53,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:17:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:17:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:17:53,792 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 02:17:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:53,989 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-20 02:17:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:17:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 02:17:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:53,990 INFO L225 Difference]: With dead ends: 36 [2022-03-20 02:17:53,991 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 02:17:53,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:17:53,992 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:53,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:17:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 02:17:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 02:17:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 02:17:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 02:17:54,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 02:17:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:54,000 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 02:17:54,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 02:17:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 02:17:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 02:17:54,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:54,001 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:54,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 02:17:54,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 02:17:54,213 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2022-03-20 02:17:54,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632027789] [2022-03-20 02:17:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:54,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:54,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:54,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082984337] [2022-03-20 02:17:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:54,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:54,229 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 02:17:54,231 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 02:17:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:54,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:17:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:54,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632027789] [2022-03-20 02:17:54,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082984337] [2022-03-20 02:17:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082984337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:17:54,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:17:54,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 02:17:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050311248] [2022-03-20 02:17:54,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:54,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:17:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:17:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:17:54,512 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 02:17:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:54,743 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-20 02:17:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:17:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-03-20 02:17:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:54,747 INFO L225 Difference]: With dead ends: 66 [2022-03-20 02:17:54,747 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 02:17:54,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:17:54,748 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:54,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:17:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 02:17:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-03-20 02:17:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:17:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 02:17:54,759 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-03-20 02:17:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:54,759 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 02:17:54,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 02:17:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 02:17:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 02:17:54,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:54,760 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:54,786 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 02:17:54,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:54,976 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2022-03-20 02:17:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780731419] [2022-03-20 02:17:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:54,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240795450] [2022-03-20 02:17:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:54,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:55,007 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 02:17:55,009 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 02:17:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 02:17:55,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:17:55,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 02:17:55,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780731419] [2022-03-20 02:17:55,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:55,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240795450] [2022-03-20 02:17:55,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240795450] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 02:17:55,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:17:55,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 02:17:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960418281] [2022-03-20 02:17:55,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:17:55,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:17:55,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:55,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:17:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:17:55,302 INFO L87 Difference]: Start difference. First operand 54 states and 63 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:17:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:55,334 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-03-20 02:17:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:17:55,339 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-20 02:17:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:55,344 INFO L225 Difference]: With dead ends: 68 [2022-03-20 02:17:55,344 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 02:17:55,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:17:55,347 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:55,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:17:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 02:17:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-03-20 02:17:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:17:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-20 02:17:55,368 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2022-03-20 02:17:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:55,369 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-20 02:17:55,371 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 02:17:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-20 02:17:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 02:17:55,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:55,372 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:55,377 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 02:17:55,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:55,576 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2022-03-20 02:17:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:55,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468806175] [2022-03-20 02:17:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:55,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618362188] [2022-03-20 02:17:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:55,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:55,588 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 02:17:55,597 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 02:17:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 02:17:55,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:17:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:56,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468806175] [2022-03-20 02:17:56,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618362188] [2022-03-20 02:17:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618362188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:17:56,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:17:56,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 02:17:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871194935] [2022-03-20 02:17:56,046 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:56,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:17:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:17:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:17:56,047 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 02:17:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:56,105 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-20 02:17:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:17:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 02:17:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:56,109 INFO L225 Difference]: With dead ends: 59 [2022-03-20 02:17:56,109 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 02:17:56,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:17:56,112 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 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 02:17:56,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:17:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 02:17:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 02:17:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 02:17:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 02:17:56,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2022-03-20 02:17:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:56,127 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 02:17:56,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 02:17:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 02:17:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 02:17:56,129 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:56,129 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:56,154 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 02:17:56,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:56,344 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 2 times [2022-03-20 02:17:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:56,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248733932] [2022-03-20 02:17:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:56,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191735225] [2022-03-20 02:17:56,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:17:56,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:56,357 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 02:17:56,384 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 02:17:56,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:17:56,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:17:56,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 02:17:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 02:17:56,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248733932] [2022-03-20 02:17:56,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191735225] [2022-03-20 02:17:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191735225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:17:56,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:17:56,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 02:17:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341429401] [2022-03-20 02:17:56,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:56,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:17:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:17:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:17:56,779 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 02:17:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:56,861 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-03-20 02:17:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:17:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-03-20 02:17:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:56,865 INFO L225 Difference]: With dead ends: 58 [2022-03-20 02:17:56,865 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 02:17:56,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:17:56,866 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:56,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:17:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 02:17:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 02:17:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 02:17:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-20 02:17:56,874 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-03-20 02:17:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:56,875 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-20 02:17:56,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 02:17:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-20 02:17:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 02:17:56,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:56,876 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:56,883 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 02:17:57,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:57,082 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash 468857897, now seen corresponding path program 3 times [2022-03-20 02:17:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:57,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098202537] [2022-03-20 02:17:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:57,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93906985] [2022-03-20 02:17:57,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:17:57,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:57,095 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 02:17:57,100 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 02:17:57,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 02:17:57,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:17:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 02:17:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 02:17:57,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098202537] [2022-03-20 02:17:57,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93906985] [2022-03-20 02:17:57,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93906985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:17:57,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:17:57,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 02:17:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114828287] [2022-03-20 02:17:57,929 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:57,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:17:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:17:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:17:57,931 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 02:17:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:58,037 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-20 02:17:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 02:17:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-03-20 02:17:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:58,038 INFO L225 Difference]: With dead ends: 60 [2022-03-20 02:17:58,038 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 02:17:58,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:17:58,039 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:58,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:17:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 02:17:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 02:17:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 02:17:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 02:17:58,047 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-03-20 02:17:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:58,048 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 02:17:58,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 02:17:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 02:17:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 02:17:58,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:58,049 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:58,057 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 02:17:58,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:58,255 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 1 times [2022-03-20 02:17:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:58,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580671771] [2022-03-20 02:17:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:58,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:58,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399192261] [2022-03-20 02:17:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:58,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:58,274 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 02:17:58,275 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 02:17:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:17:58,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 02:17:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 02:17:58,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 02:17:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580671771] [2022-03-20 02:17:58,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399192261] [2022-03-20 02:17:58,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399192261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:17:58,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:17:58,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 02:17:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428372922] [2022-03-20 02:17:58,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:58,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 02:17:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 02:17:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:17:58,622 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 02:17:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:58,822 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-03-20 02:17:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 02:17:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2022-03-20 02:17:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:58,824 INFO L225 Difference]: With dead ends: 140 [2022-03-20 02:17:58,824 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 02:17:58,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 02:17:58,825 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:58,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 157 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:17:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 02:17:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2022-03-20 02:17:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 02:17:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-03-20 02:17:58,839 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 55 [2022-03-20 02:17:58,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:58,840 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-03-20 02:17:58,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 02:17:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-03-20 02:17:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 02:17:58,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:58,841 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:58,871 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 02:17:59,065 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,SelfDestructingSolverStorable8 [2022-03-20 02:17:59,065 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1425669898, now seen corresponding path program 4 times [2022-03-20 02:17:59,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:59,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51751055] [2022-03-20 02:17:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:59,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:59,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553047761] [2022-03-20 02:17:59,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 02:17:59,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:59,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:59,076 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 02:17:59,078 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 02:17:59,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 02:17:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:17:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 02:17:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:17:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 02:17:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:17:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:17:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51751055] [2022-03-20 02:17:59,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:17:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553047761] [2022-03-20 02:17:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553047761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:17:59,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:17:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 02:17:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942307608] [2022-03-20 02:17:59,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:17:59,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 02:17:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:17:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 02:17:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:17:59,571 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 02:17:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:17:59,680 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-03-20 02:17:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:17:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-03-20 02:17:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:17:59,682 INFO L225 Difference]: With dead ends: 110 [2022-03-20 02:17:59,682 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 02:17:59,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:17:59,685 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:17:59,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 318 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:17:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 02:17:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 02:17:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 02:17:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-03-20 02:17:59,700 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 61 [2022-03-20 02:17:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:17:59,701 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-03-20 02:17:59,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 02:17:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-03-20 02:17:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:17:59,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:17:59,702 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:17:59,726 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 02:17:59,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 02:17:59,916 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:17:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:17:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 5 times [2022-03-20 02:17:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:17:59,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262726504] [2022-03-20 02:17:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:17:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:17:59,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:17:59,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067018499] [2022-03-20 02:17:59,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 02:17:59,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:17:59,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:17:59,928 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 02:17:59,947 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 02:18:00,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 02:18:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:18:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 02:18:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:18:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 02:18:00,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:18:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:18:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262726504] [2022-03-20 02:18:00,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:18:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067018499] [2022-03-20 02:18:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067018499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:18:00,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:18:00,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 02:18:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211744863] [2022-03-20 02:18:00,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:18:00,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 02:18:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:18:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 02:18:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:18:00,792 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 02:18:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:18:00,917 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-03-20 02:18:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 02:18:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-03-20 02:18:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:18:00,919 INFO L225 Difference]: With dead ends: 109 [2022-03-20 02:18:00,919 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 02:18:00,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:18:00,920 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:18:00,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:18:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 02:18:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 02:18:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 02:18:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-03-20 02:18:00,931 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 69 [2022-03-20 02:18:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:18:00,932 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-03-20 02:18:00,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 02:18:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-03-20 02:18:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 02:18:00,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:18:00,933 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:18:00,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 02:18:01,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 02:18:01,139 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:18:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:18:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 540885452, now seen corresponding path program 6 times [2022-03-20 02:18:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:18:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734594516] [2022-03-20 02:18:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:18:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:18:01,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:18:01,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278452403] [2022-03-20 02:18:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 02:18:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:18:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:18:01,151 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:18:01,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 02:18:06,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 02:18:06,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:18:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 02:18:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:18:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 02:18:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:18:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:18:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734594516] [2022-03-20 02:18:07,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:18:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278452403] [2022-03-20 02:18:07,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278452403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:18:07,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:18:07,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 02:18:07,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555977117] [2022-03-20 02:18:07,356 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:18:07,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:18:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:18:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:18:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:18:07,357 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 02:18:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:18:07,508 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-03-20 02:18:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:18:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-03-20 02:18:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:18:07,509 INFO L225 Difference]: With dead ends: 108 [2022-03-20 02:18:07,509 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 02:18:07,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:18:07,510 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:18:07,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 454 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:18:07,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 02:18:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 02:18:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 02:18:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-03-20 02:18:07,519 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 77 [2022-03-20 02:18:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:18:07,519 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-03-20 02:18:07,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 02:18:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-03-20 02:18:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 02:18:07,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:18:07,520 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:18:07,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 02:18:07,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 02:18:07,735 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:18:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:18:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1082476115, now seen corresponding path program 7 times [2022-03-20 02:18:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:18:07,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772971648] [2022-03-20 02:18:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:18:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:18:07,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:18:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375580871] [2022-03-20 02:18:07,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 02:18:07,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:18:07,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:18:07,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:18:07,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 02:18:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:18:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 02:18:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:18:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 02:18:08,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:18:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:18:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772971648] [2022-03-20 02:18:09,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:18:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375580871] [2022-03-20 02:18:09,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375580871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:18:09,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:18:09,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 02:18:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91186388] [2022-03-20 02:18:09,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:18:09,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:18:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:18:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:18:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 02:18:09,304 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 02:18:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:18:09,475 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-03-20 02:18:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:18:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-03-20 02:18:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:18:09,476 INFO L225 Difference]: With dead ends: 107 [2022-03-20 02:18:09,476 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 02:18:09,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-20 02:18:09,477 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:18:09,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:18:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 02:18:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 02:18:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 02:18:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-20 02:18:09,487 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 85 [2022-03-20 02:18:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:18:09,487 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-20 02:18:09,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 02:18:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-20 02:18:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 02:18:09,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:18:09,488 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:18:09,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 02:18:09,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 02:18:09,695 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:18:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:18:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash -243875698, now seen corresponding path program 8 times [2022-03-20 02:18:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:18:09,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5086674] [2022-03-20 02:18:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:18:09,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:18:09,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:18:09,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201223834] [2022-03-20 02:18:09,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:18:09,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:18:09,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:18:09,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:18:09,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 02:18:10,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:18:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:18:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 02:18:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:18:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 02:18:10,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:18:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:18:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5086674] [2022-03-20 02:18:11,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:18:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201223834] [2022-03-20 02:18:11,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201223834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:18:11,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:18:11,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 02:18:11,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209558878] [2022-03-20 02:18:11,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:18:11,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 02:18:11,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:18:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 02:18:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:18:11,084 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 02:18:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:18:11,284 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-03-20 02:18:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 02:18:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-03-20 02:18:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:18:11,285 INFO L225 Difference]: With dead ends: 106 [2022-03-20 02:18:11,285 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 02:18:11,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:18:11,286 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:18:11,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 614 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:18:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 02:18:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 02:18:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 02:18:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-03-20 02:18:11,305 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-03-20 02:18:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:18:11,307 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-03-20 02:18:11,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 02:18:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-03-20 02:18:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 02:18:11,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:18:11,308 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:18:11,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 02:18:11,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 02:18:11,520 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:18:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:18:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1379030639, now seen corresponding path program 9 times [2022-03-20 02:18:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:18:11,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970437112] [2022-03-20 02:18:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:18:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:18:11,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:18:11,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579662603] [2022-03-20 02:18:11,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:18:11,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:18:11,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:18:11,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:18:11,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process