/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/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 01:18:59,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 01:18:59,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 01:18:59,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 01:18:59,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 01:18:59,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 01:18:59,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 01:18:59,445 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 01:18:59,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 01:18:59,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 01:18:59,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 01:18:59,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 01:18:59,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 01:18:59,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 01:18:59,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 01:18:59,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 01:18:59,460 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 01:18:59,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 01:18:59,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 01:18:59,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 01:18:59,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:18:59,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 01:18:59,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 01:18:59,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 01:18:59,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 01:18:59,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 01:18:59,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 01:18:59,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 01:18:59,693 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 01:18:59,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-20 01:18:59,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26afbbb21/5aa0971d45974dc8aeffc2e186e424b6/FLAGac2b1ad63 [2022-03-20 01:19:00,123 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 01:19:00,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-20 01:19:00,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26afbbb21/5aa0971d45974dc8aeffc2e186e424b6/FLAGac2b1ad63 [2022-03-20 01:19:00,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26afbbb21/5aa0971d45974dc8aeffc2e186e424b6 [2022-03-20 01:19:00,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 01:19:00,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 01:19:00,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 01:19:00,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 01:19:00,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 01:19:00,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cebdc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00, skipping insertion in model container [2022-03-20 01:19:00,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 01:19:00,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 01:19:00,367 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/hard2_unwindbound20.c[526,539] [2022-03-20 01:19:00,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:19:00,392 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 01:19:00,403 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/hard2_unwindbound20.c[526,539] [2022-03-20 01:19:00,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:19:00,424 INFO L208 MainTranslator]: Completed translation [2022-03-20 01:19:00,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00 WrapperNode [2022-03-20 01:19:00,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 01:19:00,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 01:19:00,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 01:19:00,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 01:19:00,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 01:19:00,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 01:19:00,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 01:19:00,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 01:19:00,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (1/1) ... [2022-03-20 01:19:00,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:19:00,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:00,474 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 01:19:00,503 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 01:19:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 01:19:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 01:19:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 01:19:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 01:19:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 01:19:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 01:19:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 01:19:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 01:19:00,561 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 01:19:00,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 01:19:00,680 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 01:19:00,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 01:19:00,685 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 01:19:00,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:19:00 BoogieIcfgContainer [2022-03-20 01:19:00,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 01:19:00,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 01:19:00,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 01:19:00,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 01:19:00,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:19:00" (1/3) ... [2022-03-20 01:19:00,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4449d8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:19:00, skipping insertion in model container [2022-03-20 01:19:00,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:00" (2/3) ... [2022-03-20 01:19:00,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4449d8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:19:00, skipping insertion in model container [2022-03-20 01:19:00,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:19:00" (3/3) ... [2022-03-20 01:19:00,707 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-03-20 01:19:00,711 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 01:19:00,711 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 01:19:00,744 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 01:19:00,749 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 01:19:00,749 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 01:19:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 01:19:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 01:19:00,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:00,765 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:00,766 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-20 01:19:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447799141] [2022-03-20 01:19:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:00,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:19:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:00,947 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 01:19:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447799141] [2022-03-20 01:19:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447799141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:00,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:00,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 01:19:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253282695] [2022-03-20 01:19:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:00,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 01:19:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 01:19:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:19:00,981 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:01,076 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-20 01:19:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 01:19:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 01:19:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:01,087 INFO L225 Difference]: With dead ends: 57 [2022-03-20 01:19:01,088 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 01:19:01,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:19:01,095 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:01,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:19:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 01:19:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 01:19:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:19:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 01:19:01,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 01:19:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:01,130 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 01:19:01,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 01:19:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 01:19:01,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:01,131 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:01,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 01:19:01,132 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-20 01:19:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:01,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330752631] [2022-03-20 01:19:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:19:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,261 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 01:19:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330752631] [2022-03-20 01:19:01,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330752631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:01,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:01,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:19:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130309103] [2022-03-20 01:19:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:01,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:19:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:19:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:19:01,264 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:01,411 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-20 01:19:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 01:19:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 01:19:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:01,413 INFO L225 Difference]: With dead ends: 41 [2022-03-20 01:19:01,413 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 01:19:01,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:19:01,417 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:01,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:19:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 01:19:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 01:19:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:19:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 01:19:01,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 01:19:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:01,429 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 01:19:01,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 01:19:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 01:19:01,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:01,430 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:01,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 01:19:01,430 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-20 01:19:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:01,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524911347] [2022-03-20 01:19:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:19:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,504 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 01:19:01,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524911347] [2022-03-20 01:19:01,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524911347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:01,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:01,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 01:19:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674971342] [2022-03-20 01:19:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:01,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:01,507 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:01,569 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-20 01:19:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 01:19:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 01:19:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:01,571 INFO L225 Difference]: With dead ends: 46 [2022-03-20 01:19:01,571 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 01:19:01,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:19:01,577 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:01,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 01:19:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 01:19:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:19:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 01:19:01,590 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 01:19:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:01,590 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 01:19:01,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 01:19:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 01:19:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 01:19:01,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:01,591 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:01,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 01:19:01,592 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-20 01:19:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891047759] [2022-03-20 01:19:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:19:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 01:19:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:19:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891047759] [2022-03-20 01:19:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891047759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:01,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:19:01,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270192424] [2022-03-20 01:19:01,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:01,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:19:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:19:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:19:01,658 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 01:19:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:01,793 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 01:19:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 01:19:01,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 01:19:01,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:01,796 INFO L225 Difference]: With dead ends: 46 [2022-03-20 01:19:01,796 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 01:19:01,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:19:01,805 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:01,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:19:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 01:19:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 01:19:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:19:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 01:19:01,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 01:19:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:01,811 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 01:19:01,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 01:19:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 01:19:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 01:19:01,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:01,813 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:01,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 01:19:01,814 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-20 01:19:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:01,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583547000] [2022-03-20 01:19:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:01,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:01,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:01,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27595950] [2022-03-20 01:19:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:01,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:01,856 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 01:19:01,857 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 01:19:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 01:19:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 01:19:02,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:19:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583547000] [2022-03-20 01:19:02,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27595950] [2022-03-20 01:19:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27595950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:02,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:02,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:19:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978575243] [2022-03-20 01:19:02,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:02,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:02,017 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 01:19:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:02,053 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-20 01:19:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:19:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 01:19:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:02,054 INFO L225 Difference]: With dead ends: 65 [2022-03-20 01:19:02,054 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 01:19:02,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:19:02,055 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:02,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 01:19:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 01:19:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 01:19:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 01:19:02,063 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 01:19:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:02,063 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 01:19:02,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 01:19:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 01:19:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 01:19:02,064 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:02,064 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:02,087 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 01:19:02,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:02,268 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-20 01:19:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:02,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506314799] [2022-03-20 01:19:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:02,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460103834] [2022-03-20 01:19:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:02,277 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 01:19:02,278 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 01:19:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:19:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:19:02,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:19:02,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506314799] [2022-03-20 01:19:02,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460103834] [2022-03-20 01:19:02,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460103834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:02,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:02,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:19:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906574285] [2022-03-20 01:19:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:02,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:02,392 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:02,424 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-20 01:19:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:19:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 01:19:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:02,427 INFO L225 Difference]: With dead ends: 70 [2022-03-20 01:19:02,427 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 01:19:02,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:02,428 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:02,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 01:19:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 01:19:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 01:19:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 01:19:02,434 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 01:19:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:02,434 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 01:19:02,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 01:19:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 01:19:02,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:02,435 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:02,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:02,636 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,SelfDestructingSolverStorable5 [2022-03-20 01:19:02,636 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-20 01:19:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:02,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366212400] [2022-03-20 01:19:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:02,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:02,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729684828] [2022-03-20 01:19:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:02,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:02,645 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 01:19:02,646 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 01:19:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:19:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:19:02,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:19:02,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366212400] [2022-03-20 01:19:02,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729684828] [2022-03-20 01:19:02,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729684828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:02,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:02,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:19:02,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931325946] [2022-03-20 01:19:02,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:02,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:02,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:02,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:02,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:02,787 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:02,827 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-20 01:19:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:19:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 01:19:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:02,830 INFO L225 Difference]: With dead ends: 76 [2022-03-20 01:19:02,831 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 01:19:02,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 01:19:02,834 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:02,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 01:19:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 01:19:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 01:19:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 01:19:02,851 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 01:19:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:02,852 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 01:19:02,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 01:19:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 01:19:02,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:02,853 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:02,877 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 01:19:03,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:03,060 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-20 01:19:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:03,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061778542] [2022-03-20 01:19:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:03,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108010533] [2022-03-20 01:19:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:03,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:03,070 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 01:19:03,072 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 01:19:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:19:03,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 01:19:03,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 01:19:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061778542] [2022-03-20 01:19:03,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108010533] [2022-03-20 01:19:03,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108010533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:19:03,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:19:03,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 01:19:03,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275012712] [2022-03-20 01:19:03,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:19:03,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 01:19:03,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 01:19:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 01:19:03,281 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 01:19:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:03,361 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2022-03-20 01:19:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 01:19:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-03-20 01:19:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:03,365 INFO L225 Difference]: With dead ends: 144 [2022-03-20 01:19:03,365 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 01:19:03,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 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 01:19:03,368 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:03,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 207 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:19:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 01:19:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-03-20 01:19:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 01:19:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-20 01:19:03,388 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-03-20 01:19:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:03,388 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-20 01:19:03,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 01:19:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-20 01:19:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 01:19:03,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:03,389 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:03,409 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 01:19:03,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:03,589 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-20 01:19:03,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:03,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97080658] [2022-03-20 01:19:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:03,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831999569] [2022-03-20 01:19:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:03,597 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 01:19:03,598 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 01:19:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:19:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 01:19:03,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 01:19:03,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97080658] [2022-03-20 01:19:03,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831999569] [2022-03-20 01:19:03,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831999569] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 01:19:03,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:19:03,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 01:19:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178574157] [2022-03-20 01:19:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:03,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 01:19:03,867 INFO L87 Difference]: Start difference. First operand 112 states and 133 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:03,905 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2022-03-20 01:19:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:19:03,905 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-20 01:19:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:03,907 INFO L225 Difference]: With dead ends: 129 [2022-03-20 01:19:03,907 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 01:19:03,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 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 01:19:03,909 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:03,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 01:19:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-03-20 01:19:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 01:19:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-03-20 01:19:03,929 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-03-20 01:19:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:03,929 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-03-20 01:19:03,929 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:19:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-03-20 01:19:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 01:19:03,935 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:03,936 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:03,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:04,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:04,144 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2022-03-20 01:19:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357807793] [2022-03-20 01:19:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:04,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340780813] [2022-03-20 01:19:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:04,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:04,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:19:04,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 01:19:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:04,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 01:19:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 01:19:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 01:19:04,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357807793] [2022-03-20 01:19:04,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340780813] [2022-03-20 01:19:04,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340780813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:19:04,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:19:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 01:19:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755457884] [2022-03-20 01:19:04,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:19:04,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 01:19:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 01:19:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:19:04,395 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 01:19:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:04,525 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-03-20 01:19:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 01:19:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-03-20 01:19:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:04,527 INFO L225 Difference]: With dead ends: 245 [2022-03-20 01:19:04,527 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 01:19:04,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-20 01:19:04,527 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 80 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:04,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 302 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:19:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 01:19:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-03-20 01:19:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 01:19:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-03-20 01:19:04,539 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-03-20 01:19:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:04,540 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-03-20 01:19:04,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 01:19:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-03-20 01:19:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 01:19:04,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:04,541 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:04,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:04,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:04,756 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 1 times [2022-03-20 01:19:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561775320] [2022-03-20 01:19:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:04,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:04,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840200063] [2022-03-20 01:19:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:04,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:19:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 01:19:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 01:19:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 01:19:05,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 01:19:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561775320] [2022-03-20 01:19:05,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840200063] [2022-03-20 01:19:05,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840200063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:19:05,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:19:05,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 01:19:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620785680] [2022-03-20 01:19:05,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:19:05,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 01:19:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 01:19:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:19:05,972 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 01:19:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:10,234 INFO L93 Difference]: Finished difference Result 371 states and 479 transitions. [2022-03-20 01:19:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 01:19:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-03-20 01:19:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:10,236 INFO L225 Difference]: With dead ends: 371 [2022-03-20 01:19:10,237 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 01:19:10,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 01:19:10,238 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:10,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 294 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 01:19:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 01:19:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-03-20 01:19:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 01:19:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-03-20 01:19:10,264 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-03-20 01:19:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:10,264 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-03-20 01:19:10,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 01:19:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-03-20 01:19:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 01:19:10,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:10,266 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:10,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:10,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:10,483 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 1 times [2022-03-20 01:19:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270717662] [2022-03-20 01:19:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:10,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962868843] [2022-03-20 01:19:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:10,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:10,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:10,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:19:10,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 01:19:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:10,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 01:19:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 01:19:10,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-20 01:19:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270717662] [2022-03-20 01:19:11,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962868843] [2022-03-20 01:19:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962868843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:19:11,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:19:11,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 01:19:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437603872] [2022-03-20 01:19:11,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:19:11,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 01:19:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 01:19:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-20 01:19:11,157 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 01:19:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:11,514 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2022-03-20 01:19:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 01:19:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-03-20 01:19:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:11,518 INFO L225 Difference]: With dead ends: 335 [2022-03-20 01:19:11,518 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 01:19:11,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-20 01:19:11,519 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:11,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:19:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 01:19:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-03-20 01:19:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 01:19:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-03-20 01:19:11,532 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-03-20 01:19:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:11,532 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-03-20 01:19:11,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 01:19:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-03-20 01:19:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 01:19:11,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:11,533 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:11,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:11,739 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,SelfDestructingSolverStorable11 [2022-03-20 01:19:11,740 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1894150768, now seen corresponding path program 1 times [2022-03-20 01:19:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:11,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212198070] [2022-03-20 01:19:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:11,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700274125] [2022-03-20 01:19:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:11,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:11,753 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:19:11,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 01:19:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:19:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 01:19:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 01:19:11,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:19:11,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212198070] [2022-03-20 01:19:11,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700274125] [2022-03-20 01:19:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700274125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:19:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:19:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:19:11,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860305814] [2022-03-20 01:19:11,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:19:11,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:19:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:19:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:11,976 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 01:19:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:19:12,022 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2022-03-20 01:19:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:19:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-20 01:19:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:19:12,023 INFO L225 Difference]: With dead ends: 242 [2022-03-20 01:19:12,023 INFO L226 Difference]: Without dead ends: 222 [2022-03-20 01:19:12,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:19:12,024 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 24 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:19:12,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:19:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-20 01:19:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-03-20 01:19:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 01:19:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-03-20 01:19:12,038 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-03-20 01:19:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:19:12,038 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-03-20 01:19:12,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 01:19:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-03-20 01:19:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 01:19:12,039 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:19:12,039 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:19:12,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 01:19:12,255 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,SelfDestructingSolverStorable12 [2022-03-20 01:19:12,256 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:19:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:19:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash -612515316, now seen corresponding path program 2 times [2022-03-20 01:19:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:19:12,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561742868] [2022-03-20 01:19:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:19:12,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:19:12,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:19:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886801647] [2022-03-20 01:19:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:19:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:19:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:19:12,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:19:12,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 01:19:12,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:19:12,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:19:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 01:19:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:19:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 01:19:12,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:19:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 01:19:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:19:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561742868] [2022-03-20 01:19:28,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:19:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886801647] [2022-03-20 01:19:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886801647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:19:28,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:19:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 01:19:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658123749] [2022-03-20 01:19:28,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:19:28,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 01:19:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:19:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 01:19:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 01:19:28,819 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 01:19:48,566 WARN L232 SmtUtils]: Spent 19.46s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:19:51,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:19:59,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:01,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:04,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:06,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:09,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:11,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:20:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:12,354 INFO L93 Difference]: Finished difference Result 332 states and 434 transitions. [2022-03-20 01:20:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 01:20:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-03-20 01:20:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:12,356 INFO L225 Difference]: With dead ends: 332 [2022-03-20 01:20:12,356 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 01:20:12,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-03-20 01:20:12,357 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 130 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 178 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:12,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 660 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 520 Invalid, 5 Unknown, 0 Unchecked, 16.9s Time] [2022-03-20 01:20:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 01:20:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-03-20 01:20:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 01:20:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-03-20 01:20:12,377 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-03-20 01:20:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:12,378 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-03-20 01:20:12,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 01:20:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-03-20 01:20:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 01:20:12,379 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:12,379 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:12,396 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 01:20:12,579 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,SelfDestructingSolverStorable13 [2022-03-20 01:20:12,579 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1539828763, now seen corresponding path program 1 times [2022-03-20 01:20:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:12,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869227792] [2022-03-20 01:20:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:12,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442853355] [2022-03-20 01:20:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:12,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:12,590 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 01:20:12,591 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 01:20:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:20:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:20:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 01:20:12,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 01:20:13,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869227792] [2022-03-20 01:20:13,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442853355] [2022-03-20 01:20:13,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442853355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:13,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:13,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 01:20:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158037377] [2022-03-20 01:20:13,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:13,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 01:20:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 01:20:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 01:20:13,006 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 01:20:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:13,337 INFO L93 Difference]: Finished difference Result 746 states and 1016 transitions. [2022-03-20 01:20:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 01:20:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-03-20 01:20:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:13,342 INFO L225 Difference]: With dead ends: 746 [2022-03-20 01:20:13,342 INFO L226 Difference]: Without dead ends: 659 [2022-03-20 01:20:13,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 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 01:20:13,345 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:13,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 378 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:20:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-20 01:20:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-03-20 01:20:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 01:20:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-03-20 01:20:13,404 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-03-20 01:20:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:13,405 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-03-20 01:20:13,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 01:20:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-03-20 01:20:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 01:20:13,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:13,407 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:13,427 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 01:20:13,619 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,SelfDestructingSolverStorable14 [2022-03-20 01:20:13,619 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1894816690, now seen corresponding path program 1 times [2022-03-20 01:20:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:13,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060006158] [2022-03-20 01:20:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:13,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:13,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406382086] [2022-03-20 01:20:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:13,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:13,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:13,630 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 01:20:13,631 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 01:20:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:20:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 01:20:13,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 01:20:13,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 01:20:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060006158] [2022-03-20 01:20:14,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406382086] [2022-03-20 01:20:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406382086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:14,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 01:20:14,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898825843] [2022-03-20 01:20:14,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:14,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 01:20:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:14,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 01:20:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 01:20:14,099 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 01:20:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:14,570 INFO L93 Difference]: Finished difference Result 1159 states and 1613 transitions. [2022-03-20 01:20:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 01:20:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-03-20 01:20:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:14,575 INFO L225 Difference]: With dead ends: 1159 [2022-03-20 01:20:14,576 INFO L226 Difference]: Without dead ends: 1122 [2022-03-20 01:20:14,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-03-20 01:20:14,577 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 314 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:14,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 503 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:20:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-03-20 01:20:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-03-20 01:20:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-20 01:20:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-03-20 01:20:14,666 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-03-20 01:20:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:14,667 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-03-20 01:20:14,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 01:20:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-03-20 01:20:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 01:20:14,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:14,670 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:14,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:14,879 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,SelfDestructingSolverStorable15 [2022-03-20 01:20:14,880 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1873291208, now seen corresponding path program 1 times [2022-03-20 01:20:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284763227] [2022-03-20 01:20:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:14,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747850638] [2022-03-20 01:20:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:14,888 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 01:20:14,889 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 01:20:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:20:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 01:20:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 01:20:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 01:20:16,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284763227] [2022-03-20 01:20:16,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747850638] [2022-03-20 01:20:16,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747850638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:16,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:16,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 01:20:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223353948] [2022-03-20 01:20:16,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:16,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 01:20:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 01:20:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:20:16,004 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 01:20:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:16,397 INFO L93 Difference]: Finished difference Result 1103 states and 1463 transitions. [2022-03-20 01:20:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:20:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-03-20 01:20:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:16,402 INFO L225 Difference]: With dead ends: 1103 [2022-03-20 01:20:16,402 INFO L226 Difference]: Without dead ends: 1097 [2022-03-20 01:20:16,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:20:16,403 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:16,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 394 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:20:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-20 01:20:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-03-20 01:20:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-20 01:20:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-03-20 01:20:16,482 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-03-20 01:20:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:16,482 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-03-20 01:20:16,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 01:20:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-03-20 01:20:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 01:20:16,485 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:16,485 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:16,505 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 01:20:16,692 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,SelfDestructingSolverStorable16 [2022-03-20 01:20:16,692 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1491499276, now seen corresponding path program 2 times [2022-03-20 01:20:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:16,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412128230] [2022-03-20 01:20:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:16,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344631295] [2022-03-20 01:20:16,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:20:16,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:16,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:16,701 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 01:20:16,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 01:20:16,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:20:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 01:20:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 01:20:16,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 01:20:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412128230] [2022-03-20 01:20:17,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344631295] [2022-03-20 01:20:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344631295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:17,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:17,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 01:20:17,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370417144] [2022-03-20 01:20:17,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:17,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 01:20:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 01:20:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 01:20:17,229 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 01:20:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:17,344 INFO L93 Difference]: Finished difference Result 1320 states and 1738 transitions. [2022-03-20 01:20:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:20:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-03-20 01:20:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:17,349 INFO L225 Difference]: With dead ends: 1320 [2022-03-20 01:20:17,349 INFO L226 Difference]: Without dead ends: 907 [2022-03-20 01:20:17,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 01:20:17,351 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:17,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 247 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:20:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-20 01:20:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-03-20 01:20:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-03-20 01:20:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-03-20 01:20:17,442 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-03-20 01:20:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:17,443 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-03-20 01:20:17,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 01:20:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-03-20 01:20:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 01:20:17,444 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:17,444 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:17,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:17,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:17,659 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1372095454, now seen corresponding path program 3 times [2022-03-20 01:20:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980218759] [2022-03-20 01:20:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:17,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:17,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:17,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496511646] [2022-03-20 01:20:17,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 01:20:17,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:17,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 01:20:17,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 01:20:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 01:20:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:17,954 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:20:18,026 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:20:18,112 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:20:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-20 01:20:18,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:30,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980218759] [2022-03-20 01:20:30,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:30,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496511646] [2022-03-20 01:20:30,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496511646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 01:20:30,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:20:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 01:20:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877264114] [2022-03-20 01:20:30,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:30,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 01:20:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 01:20:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 01:20:30,423 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 01:20:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:30,547 INFO L93 Difference]: Finished difference Result 935 states and 1182 transitions. [2022-03-20 01:20:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:20:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-03-20 01:20:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:30,551 INFO L225 Difference]: With dead ends: 935 [2022-03-20 01:20:30,551 INFO L226 Difference]: Without dead ends: 921 [2022-03-20 01:20:30,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:20:30,552 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:30,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 118 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:20:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-20 01:20:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-03-20 01:20:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 01:20:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-03-20 01:20:30,622 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-03-20 01:20:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:30,622 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-03-20 01:20:30,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 01:20:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-03-20 01:20:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 01:20:30,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:30,623 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:30,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:30,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:30,839 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash 388866286, now seen corresponding path program 3 times [2022-03-20 01:20:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761974686] [2022-03-20 01:20:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:30,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:30,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479365778] [2022-03-20 01:20:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 01:20:30,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:30,852 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:30,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 01:20:30,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 01:20:30,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 01:20:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 01:20:31,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 01:20:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761974686] [2022-03-20 01:20:31,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479365778] [2022-03-20 01:20:31,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479365778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:31,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:31,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 01:20:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599439600] [2022-03-20 01:20:31,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:31,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 01:20:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 01:20:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:20:31,283 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 01:20:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:31,431 INFO L93 Difference]: Finished difference Result 771 states and 912 transitions. [2022-03-20 01:20:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 01:20:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-03-20 01:20:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:31,435 INFO L225 Difference]: With dead ends: 771 [2022-03-20 01:20:31,435 INFO L226 Difference]: Without dead ends: 755 [2022-03-20 01:20:31,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:20:31,436 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:31,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 175 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:20:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-20 01:20:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-03-20 01:20:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 01:20:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-03-20 01:20:31,499 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-03-20 01:20:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:31,500 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-03-20 01:20:31,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 01:20:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-03-20 01:20:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-20 01:20:31,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:31,502 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:31,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:31,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:31,707 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1492475124, now seen corresponding path program 2 times [2022-03-20 01:20:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862535608] [2022-03-20 01:20:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:31,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:31,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945482328] [2022-03-20 01:20:31,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:20:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:31,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:31,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 01:20:31,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:20:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 01:20:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 01:20:32,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 01:20:32,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:32,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862535608] [2022-03-20 01:20:32,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:32,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945482328] [2022-03-20 01:20:32,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945482328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:32,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:32,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 01:20:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472158355] [2022-03-20 01:20:32,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:32,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 01:20:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 01:20:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 01:20:32,570 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-03-20 01:20:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:33,189 INFO L93 Difference]: Finished difference Result 829 states and 954 transitions. [2022-03-20 01:20:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 01:20:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) Word has length 224 [2022-03-20 01:20:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:33,193 INFO L225 Difference]: With dead ends: 829 [2022-03-20 01:20:33,193 INFO L226 Difference]: Without dead ends: 816 [2022-03-20 01:20:33,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 01:20:33,194 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 345 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:33,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 599 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:20:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-20 01:20:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 815. [2022-03-20 01:20:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 548 states have (on average 1.1131386861313868) internal successors, (610), 565 states have internal predecessors, (610), 157 states have call successors, (157), 110 states have call predecessors, (157), 109 states have return successors, (155), 139 states have call predecessors, (155), 155 states have call successors, (155) [2022-03-20 01:20:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 922 transitions. [2022-03-20 01:20:33,266 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 922 transitions. Word has length 224 [2022-03-20 01:20:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:33,266 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 922 transitions. [2022-03-20 01:20:33,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-03-20 01:20:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 922 transitions. [2022-03-20 01:20:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-03-20 01:20:33,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:33,271 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:33,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:33,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:33,488 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:33,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1873636372, now seen corresponding path program 3 times [2022-03-20 01:20:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:33,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525559377] [2022-03-20 01:20:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:33,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:33,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422663169] [2022-03-20 01:20:33,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 01:20:33,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:33,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:33,503 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:33,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 01:20:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 01:20:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 01:20:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-03-20 01:20:34,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 491 proven. 85 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2022-03-20 01:20:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525559377] [2022-03-20 01:20:36,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422663169] [2022-03-20 01:20:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422663169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:36,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:36,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-03-20 01:20:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937529106] [2022-03-20 01:20:36,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:36,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 01:20:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 01:20:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:20:36,303 INFO L87 Difference]: Start difference. First operand 815 states and 922 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-03-20 01:20:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:36,773 INFO L93 Difference]: Finished difference Result 1230 states and 1428 transitions. [2022-03-20 01:20:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 01:20:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 308 [2022-03-20 01:20:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:36,778 INFO L225 Difference]: With dead ends: 1230 [2022-03-20 01:20:36,778 INFO L226 Difference]: Without dead ends: 731 [2022-03-20 01:20:36,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-20 01:20:36,780 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:36,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 512 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:20:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-20 01:20:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-03-20 01:20:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 491 states have (on average 1.1079429735234216) internal successors, (544), 505 states have internal predecessors, (544), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 01:20:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-03-20 01:20:36,853 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 308 [2022-03-20 01:20:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:36,853 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-03-20 01:20:36,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-03-20 01:20:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-03-20 01:20:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 01:20:36,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:36,856 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:36,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:37,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:37,069 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash -404979543, now seen corresponding path program 2 times [2022-03-20 01:20:37,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:37,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016862237] [2022-03-20 01:20:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:37,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:37,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:37,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32808116] [2022-03-20 01:20:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:20:37,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:37,082 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:37,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 01:20:37,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:20:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 01:20:37,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-03-20 01:20:37,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-03-20 01:20:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016862237] [2022-03-20 01:20:38,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:38,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32808116] [2022-03-20 01:20:38,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32808116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:38,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:38,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 01:20:38,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648728099] [2022-03-20 01:20:38,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:38,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 01:20:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 01:20:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 01:20:38,165 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-03-20 01:20:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:38,781 INFO L93 Difference]: Finished difference Result 1022 states and 1148 transitions. [2022-03-20 01:20:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 01:20:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) Word has length 320 [2022-03-20 01:20:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:38,784 INFO L225 Difference]: With dead ends: 1022 [2022-03-20 01:20:38,784 INFO L226 Difference]: Without dead ends: 733 [2022-03-20 01:20:38,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 01:20:38,785 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 395 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:38,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 529 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 01:20:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-20 01:20:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-03-20 01:20:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.0892494929006085) internal successors, (537), 507 states have internal predecessors, (537), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 01:20:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 813 transitions. [2022-03-20 01:20:38,853 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 813 transitions. Word has length 320 [2022-03-20 01:20:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:38,854 INFO L478 AbstractCegarLoop]: Abstraction has 733 states and 813 transitions. [2022-03-20 01:20:38,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-03-20 01:20:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 813 transitions. [2022-03-20 01:20:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 01:20:38,858 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:38,858 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:38,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:39,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:39,071 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2030633470, now seen corresponding path program 4 times [2022-03-20 01:20:39,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:39,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242350100] [2022-03-20 01:20:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:39,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:39,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781241692] [2022-03-20 01:20:39,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 01:20:39,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:39,085 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:39,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 01:20:56,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 01:20:56,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:20:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 01:20:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:20:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2016 proven. 246 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2022-03-20 01:20:56,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:20:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 389 proven. 217 refuted. 0 times theorem prover too weak. 4432 trivial. 0 not checked. [2022-03-20 01:20:58,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:20:58,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242350100] [2022-03-20 01:20:58,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:20:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781241692] [2022-03-20 01:20:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781241692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:20:58,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:20:58,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-03-20 01:20:58,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269882643] [2022-03-20 01:20:58,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:20:58,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 01:20:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:20:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 01:20:58,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:20:58,569 INFO L87 Difference]: Start difference. First operand 733 states and 813 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-03-20 01:20:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:20:58,826 INFO L93 Difference]: Finished difference Result 956 states and 1087 transitions. [2022-03-20 01:20:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 01:20:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) Word has length 320 [2022-03-20 01:20:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:20:58,830 INFO L225 Difference]: With dead ends: 956 [2022-03-20 01:20:58,830 INFO L226 Difference]: Without dead ends: 705 [2022-03-20 01:20:58,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 623 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:20:58,831 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 18 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:20:58,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 577 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:20:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-20 01:20:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-03-20 01:20:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 474 states have (on average 1.0864978902953586) internal successors, (515), 487 states have internal predecessors, (515), 133 states have call successors, (133), 98 states have call predecessors, (133), 97 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 01:20:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 779 transitions. [2022-03-20 01:20:58,892 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 779 transitions. Word has length 320 [2022-03-20 01:20:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:20:58,892 INFO L478 AbstractCegarLoop]: Abstraction has 705 states and 779 transitions. [2022-03-20 01:20:58,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-03-20 01:20:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 779 transitions. [2022-03-20 01:20:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-03-20 01:20:58,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:20:58,894 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:20:58,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 01:20:59,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-20 01:20:59,110 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:20:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:20:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1363998972, now seen corresponding path program 5 times [2022-03-20 01:20:59,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:20:59,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482958351] [2022-03-20 01:20:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:20:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:20:59,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:20:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980653081] [2022-03-20 01:20:59,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 01:20:59,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:20:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:20:59,128 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:20:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 01:21:16,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 01:21:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:21:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 01:21:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:21:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-03-20 01:21:17,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:21:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 397 proven. 239 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-03-20 01:21:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:21:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482958351] [2022-03-20 01:21:23,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:21:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980653081] [2022-03-20 01:21:23,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980653081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:21:23,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:21:23,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 01:21:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098543566] [2022-03-20 01:21:23,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:21:23,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 01:21:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:21:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 01:21:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 01:21:23,176 INFO L87 Difference]: Start difference. First operand 705 states and 779 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-03-20 01:21:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:21:23,496 INFO L93 Difference]: Finished difference Result 892 states and 1017 transitions. [2022-03-20 01:21:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 01:21:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) Word has length 324 [2022-03-20 01:21:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:21:23,499 INFO L225 Difference]: With dead ends: 892 [2022-03-20 01:21:23,499 INFO L226 Difference]: Without dead ends: 677 [2022-03-20 01:21:23,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 626 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 01:21:23,500 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 22 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:21:23,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 747 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:21:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-20 01:21:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-03-20 01:21:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 455 states have (on average 1.0835164835164834) internal successors, (493), 467 states have internal predecessors, (493), 127 states have call successors, (127), 95 states have call predecessors, (127), 94 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 01:21:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-03-20 01:21:23,567 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 324 [2022-03-20 01:21:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:21:23,567 INFO L478 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-03-20 01:21:23,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-03-20 01:21:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-03-20 01:21:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-03-20 01:21:23,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:21:23,569 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:21:23,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 01:21:23,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 01:21:23,784 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:21:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:21:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1535062410, now seen corresponding path program 6 times [2022-03-20 01:21:23,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:21:23,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121077331] [2022-03-20 01:21:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:21:23,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:21:23,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:21:23,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225024181] [2022-03-20 01:21:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 01:21:23,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:21:23,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:21:23,794 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:21:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 01:21:24,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 01:21:24,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:21:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 01:21:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:21:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-03-20 01:21:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:21:51,856 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:22:26,523 WARN L232 SmtUtils]: Spent 7.48s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:23:16,181 WARN L232 SmtUtils]: Spent 23.93s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)