/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:34:30,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:34:30,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:34:30,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:34:30,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:34:30,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:34:30,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:34:30,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:34:30,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:34:30,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:34:30,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:34:30,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:34:30,715 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:34:30,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:34:30,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:34:30,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:34:30,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:34:30,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:34:30,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:34:30,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:34:30,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:34:30,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:34:30,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:34:30,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:34:30,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:34:30,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:34:30,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:34:30,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:34:30,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:34:30,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:34:30,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:34:30,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:34:30,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:34:30,742 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:34:30,742 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:34:30,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:34:30,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:34:30,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:34:30,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:34:30,944 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:34:30,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-19 04:34:30,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb9efd00/ee2c6e8100944878ac950cb4b1b39742/FLAG4e7d47236 [2022-03-19 04:34:31,365 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:34:31,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-19 04:34:31,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb9efd00/ee2c6e8100944878ac950cb4b1b39742/FLAG4e7d47236 [2022-03-19 04:34:31,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb9efd00/ee2c6e8100944878ac950cb4b1b39742 [2022-03-19 04:34:31,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:34:31,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:34:31,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:34:31,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:34:31,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:34:31,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:34:31" (1/1) ... [2022-03-19 04:34:31,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49767ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:31, skipping insertion in model container [2022-03-19 04:34:31,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:34:31" (1/1) ... [2022-03-19 04:34:31,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:34:31,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:34:31,954 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/egcd2-ll_valuebound100.c[490,503] [2022-03-19 04:34:31,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:34:31,988 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:34:31,997 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/egcd2-ll_valuebound100.c[490,503] [2022-03-19 04:34:32,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:34:32,028 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:34:32,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32 WrapperNode [2022-03-19 04:34:32,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:34:32,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:34:32,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:34:32,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:34:32,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:34:32,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:34:32,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:34:32,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:34:32,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (1/1) ... [2022-03-19 04:34:32,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:34:32,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:32,084 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) [2022-03-19 04:34:32,089 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 [2022-03-19 04:34:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:34:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:34:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:34:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:34:32,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:34:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:34:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:34:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:34:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:34:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:34:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:34:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:34:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:34:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:34:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:34:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:34:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:34:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:34:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:34:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:34:32,164 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:34:32,165 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:34:32,285 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:34:32,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:34:32,289 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 04:34:32,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:34:32 BoogieIcfgContainer [2022-03-19 04:34:32,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:34:32,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:34:32,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:34:32,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:34:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:34:31" (1/3) ... [2022-03-19 04:34:32,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f0eb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:34:32, skipping insertion in model container [2022-03-19 04:34:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:34:32" (2/3) ... [2022-03-19 04:34:32,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f0eb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:34:32, skipping insertion in model container [2022-03-19 04:34:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:34:32" (3/3) ... [2022-03-19 04:34:32,295 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2022-03-19 04:34:32,298 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:34:32,298 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:34:32,333 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:34:32,353 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-19 04:34:32,353 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:34:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:34:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:34:32,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:32,374 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:32,375 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-19 04:34:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:32,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691741789] [2022-03-19 04:34:32,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-19 04:34:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:32,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312768186] [2022-03-19 04:34:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:34:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:34:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:34:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:34:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 04:34:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 04:34:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 04:34:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:34:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:34:32,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312768186] [2022-03-19 04:34:32,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312768186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:32,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:32,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:34:32,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691741789] [2022-03-19 04:34:32,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691741789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:32,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:32,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:34:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922938807] [2022-03-19 04:34:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:32,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:34:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:34:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:34:32,651 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:34:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:32,745 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-19 04:34:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:34:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 04:34:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:32,752 INFO L225 Difference]: With dead ends: 73 [2022-03-19 04:34:32,753 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 04:34:32,756 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:34:32,759 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:32,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:34:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 04:34:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 04:34:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:34:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-19 04:34:32,806 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-19 04:34:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:32,807 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-19 04:34:32,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:34:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-19 04:34:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 04:34:32,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:32,809 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:32,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:34:32,810 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-19 04:34:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:32,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657572908] [2022-03-19 04:34:32,816 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-19 04:34:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093023926] [2022-03-19 04:34:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:32,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:32,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872558164] [2022-03-19 04:34:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:32,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:32,860 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) [2022-03-19 04:34:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:34:32,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:34:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:34:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:34:33,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093023926] [2022-03-19 04:34:33,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872558164] [2022-03-19 04:34:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872558164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:34:33,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:34:33,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 04:34:33,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:33,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657572908] [2022-03-19 04:34:33,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657572908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:33,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:33,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:34:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902746835] [2022-03-19 04:34:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:33,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:34:33,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:34:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:34:33,144 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:34:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:33,222 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-19 04:34:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:34:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 04:34:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:33,224 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:34:33,224 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 04:34:33,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:34:33,225 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:33,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 04:34:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 04:34:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:34:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-19 04:34:33,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-19 04:34:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:33,233 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-19 04:34:33,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:34:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-19 04:34:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 04:34:33,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:33,234 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:33,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:33,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:33,469 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-19 04:34:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520649855] [2022-03-19 04:34:33,470 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-19 04:34:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188199711] [2022-03-19 04:34:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:33,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:33,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865036422] [2022-03-19 04:34:33,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:33,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:33,490 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) [2022-03-19 04:34:33,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:34:33,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:34:33,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 04:34:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:34:33,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:34:33,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188199711] [2022-03-19 04:34:33,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865036422] [2022-03-19 04:34:33,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865036422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:33,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:33,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:33,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:33,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520649855] [2022-03-19 04:34:33,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520649855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:33,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:33,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176562968] [2022-03-19 04:34:33,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:33,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:34:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:34:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:34:33,652 INFO L87 Difference]: Start difference. First operand 37 states and 48 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:34:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:33,685 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-19 04:34:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:34:33,685 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-19 04:34:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:33,686 INFO L225 Difference]: With dead ends: 50 [2022-03-19 04:34:33,686 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 04:34:33,687 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:34:33,688 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:33,688 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 04:34:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-19 04:34:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:34:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-19 04:34:33,695 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-19 04:34:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:33,696 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-19 04:34:33,696 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:34:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-19 04:34:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 04:34:33,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:33,697 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:33,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:33,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 04:34:33,912 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-19 04:34:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110999308] [2022-03-19 04:34:33,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-19 04:34:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457358768] [2022-03-19 04:34:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:33,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:33,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223890008] [2022-03-19 04:34:33,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:33,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:33,931 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) [2022-03-19 04:34:33,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:34:33,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:33,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:34:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:34:34,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:34:34,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457358768] [2022-03-19 04:34:34,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223890008] [2022-03-19 04:34:34,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223890008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:34,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:34,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:34,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110999308] [2022-03-19 04:34:34,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110999308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:34,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:34,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505017952] [2022-03-19 04:34:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:34,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:34:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:34:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:34:34,095 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:34:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:34,122 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-19 04:34:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:34:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-19 04:34:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:34,125 INFO L225 Difference]: With dead ends: 58 [2022-03-19 04:34:34,125 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 04:34:34,125 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:34:34,126 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:34,126 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 04:34:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-19 04:34:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:34:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-19 04:34:34,135 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-19 04:34:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:34,136 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-19 04:34:34,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:34:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-19 04:34:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:34:34,136 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:34,137 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:34,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:34,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:34,354 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-19 04:34:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944432636] [2022-03-19 04:34:34,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-19 04:34:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:34,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292437256] [2022-03-19 04:34:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:34,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195788997] [2022-03-19 04:34:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:34,376 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) [2022-03-19 04:34:34,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:34:34,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:34:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:34:34,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:34:34,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292437256] [2022-03-19 04:34:34,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195788997] [2022-03-19 04:34:34,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195788997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:34,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:34,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:34,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944432636] [2022-03-19 04:34:34,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944432636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:34,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:34,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220063460] [2022-03-19 04:34:34,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:34,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:34:34,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:34,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:34:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:34:34,590 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:34:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:34,636 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-19 04:34:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:34:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-19 04:34:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:34,638 INFO L225 Difference]: With dead ends: 62 [2022-03-19 04:34:34,638 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 04:34:34,638 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:34:34,641 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:34,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 04:34:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 04:34:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:34:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-19 04:34:34,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-19 04:34:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:34,657 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-19 04:34:34,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:34:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-19 04:34:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 04:34:34,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:34,661 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:34,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:34,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:34,899 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-19 04:34:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [130041309] [2022-03-19 04:34:34,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-19 04:34:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604130487] [2022-03-19 04:34:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:34,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:34,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78938232] [2022-03-19 04:34:34,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:34,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:34,922 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) [2022-03-19 04:34:34,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:34:34,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:34:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 04:34:35,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604130487] [2022-03-19 04:34:35,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78938232] [2022-03-19 04:34:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78938232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:34:35,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:34:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 04:34:35,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [130041309] [2022-03-19 04:34:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [130041309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:35,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:34:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089110639] [2022-03-19 04:34:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:35,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:34:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:34:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:34:35,236 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:34:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:35,322 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-19 04:34:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:34:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-19 04:34:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:35,323 INFO L225 Difference]: With dead ends: 66 [2022-03-19 04:34:35,324 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 04:34:35,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:34:35,324 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:35,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:34:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 04:34:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 04:34:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:34:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-19 04:34:35,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-19 04:34:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:35,332 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-19 04:34:35,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:34:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-19 04:34:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 04:34:35,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:35,333 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:35,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:35,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:35,548 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-19 04:34:35,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:35,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954233786] [2022-03-19 04:34:35,549 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:35,549 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-19 04:34:35,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:35,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256254709] [2022-03-19 04:34:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:35,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:35,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330925697] [2022-03-19 04:34:35,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:35,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:35,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:35,559 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) [2022-03-19 04:34:35,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:34:35,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:34:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 04:34:35,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-19 04:34:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256254709] [2022-03-19 04:34:35,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330925697] [2022-03-19 04:34:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330925697] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:34:35,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:34:35,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 04:34:35,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:35,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954233786] [2022-03-19 04:34:35,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954233786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:35,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:35,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961686132] [2022-03-19 04:34:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:35,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:34:35,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:35,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:34:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:34:35,819 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:34:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:35,853 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-19 04:34:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:34:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-19 04:34:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:35,854 INFO L225 Difference]: With dead ends: 69 [2022-03-19 04:34:35,854 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 04:34:35,855 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:34:35,855 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:35,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 04:34:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-19 04:34:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:34:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-19 04:34:35,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-19 04:34:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:35,880 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-19 04:34:35,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:34:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-19 04:34:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 04:34:35,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:35,881 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:35,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:36,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:36,098 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-19 04:34:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292270530] [2022-03-19 04:34:36,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-19 04:34:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:36,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345578108] [2022-03-19 04:34:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:36,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174994932] [2022-03-19 04:34:36,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:36,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:36,109 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) [2022-03-19 04:34:36,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:34:36,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:36,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:34:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:34:36,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:34:36,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345578108] [2022-03-19 04:34:36,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174994932] [2022-03-19 04:34:36,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174994932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:34:36,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:34:36,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:34:36,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:36,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292270530] [2022-03-19 04:34:36,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292270530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:36,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:36,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:34:36,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122823382] [2022-03-19 04:34:36,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:36,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:34:36,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:34:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:34:36,391 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:34:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:36,497 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-19 04:34:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:34:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-19 04:34:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:36,498 INFO L225 Difference]: With dead ends: 106 [2022-03-19 04:34:36,498 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 04:34:36,499 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:34:36,499 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:36,499 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:34:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 04:34:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-19 04:34:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 04:34:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-19 04:34:36,511 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-19 04:34:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:36,512 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-19 04:34:36,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:34:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-19 04:34:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:34:36,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:36,512 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:36,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:36,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:36,729 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-19 04:34:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951704501] [2022-03-19 04:34:36,730 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-19 04:34:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287890698] [2022-03-19 04:34:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:36,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:36,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737732814] [2022-03-19 04:34:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:36,748 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) [2022-03-19 04:34:36,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:34:36,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:34:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:34:36,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:34:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287890698] [2022-03-19 04:34:37,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737732814] [2022-03-19 04:34:37,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737732814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:34:37,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:34:37,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-19 04:34:37,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951704501] [2022-03-19 04:34:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951704501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:37,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:34:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928192124] [2022-03-19 04:34:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:37,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:34:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:34:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:34:37,120 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:34:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:37,272 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-19 04:34:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:34:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-19 04:34:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:37,274 INFO L225 Difference]: With dead ends: 124 [2022-03-19 04:34:37,274 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 04:34:37,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:34:37,276 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:37,276 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:34:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 04:34:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-19 04:34:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:34:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-19 04:34:37,301 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-19 04:34:37,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:37,302 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-19 04:34:37,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:34:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-19 04:34:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 04:34:37,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:37,306 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:37,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:37,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 04:34:37,519 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-19 04:34:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303481123] [2022-03-19 04:34:37,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-19 04:34:37,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:37,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085071804] [2022-03-19 04:34:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:37,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:37,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821201989] [2022-03-19 04:34:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:34:37,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:37,536 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) [2022-03-19 04:34:37,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:34:37,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:34:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:34:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 04:34:37,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 04:34:38,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085071804] [2022-03-19 04:34:38,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821201989] [2022-03-19 04:34:38,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821201989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:34:38,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:34:38,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-19 04:34:38,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303481123] [2022-03-19 04:34:38,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303481123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:38,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:38,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:34:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135498862] [2022-03-19 04:34:38,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:38,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:34:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:34:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:34:38,229 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-03-19 04:34:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:38,421 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-03-19 04:34:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:34:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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 80 [2022-03-19 04:34:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:38,423 INFO L225 Difference]: With dead ends: 130 [2022-03-19 04:34:38,423 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 04:34:38,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:34:38,424 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:38,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:34:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 04:34:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-19 04:34:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:34:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2022-03-19 04:34:38,442 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 80 [2022-03-19 04:34:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:38,443 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2022-03-19 04:34:38,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-03-19 04:34:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2022-03-19 04:34:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 04:34:38,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:38,444 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:38,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:38,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:34:38,662 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-19 04:34:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193213195] [2022-03-19 04:34:38,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-19 04:34:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129229823] [2022-03-19 04:34:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:38,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:38,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605477082] [2022-03-19 04:34:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:34:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:38,672 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) [2022-03-19 04:34:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:34:38,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:34:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:34:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-19 04:34:39,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:39,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129229823] [2022-03-19 04:34:39,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605477082] [2022-03-19 04:34:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605477082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:34:39,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:34:39,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 04:34:39,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193213195] [2022-03-19 04:34:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193213195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:39,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:39,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:34:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357927204] [2022-03-19 04:34:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:39,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:34:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:34:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:34:39,238 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:34:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:39,599 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-19 04:34:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:34:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-19 04:34:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:39,601 INFO L225 Difference]: With dead ends: 134 [2022-03-19 04:34:39,601 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 04:34:39,601 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:34:39,601 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:39,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:34:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 04:34:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 04:34:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:34:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-19 04:34:39,614 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 85 [2022-03-19 04:34:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:39,615 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-19 04:34:39,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:34:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-19 04:34:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:34:39,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:39,616 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:39,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:34:39,830 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-19 04:34:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011122844] [2022-03-19 04:34:39,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-19 04:34:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:39,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632116094] [2022-03-19 04:34:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:39,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:39,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483845802] [2022-03-19 04:34:39,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:39,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:39,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:39,839 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) [2022-03-19 04:34:39,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:34:39,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:34:39,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:34:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:34:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:34:40,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632116094] [2022-03-19 04:34:40,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483845802] [2022-03-19 04:34:40,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483845802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:34:40,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:34:40,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:34:40,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011122844] [2022-03-19 04:34:40,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011122844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:40,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:40,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:34:40,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276623433] [2022-03-19 04:34:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:40,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:34:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:34:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:34:40,658 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:34:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:40,923 INFO L93 Difference]: Finished difference Result 157 states and 211 transitions. [2022-03-19 04:34:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:34:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-19 04:34:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:40,929 INFO L225 Difference]: With dead ends: 157 [2022-03-19 04:34:40,929 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 04:34:40,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:34:40,930 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:40,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:34:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 04:34:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-03-19 04:34:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:34:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2022-03-19 04:34:40,953 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 91 [2022-03-19 04:34:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:40,953 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2022-03-19 04:34:40,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:34:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2022-03-19 04:34:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 04:34:40,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:40,954 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:40,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 04:34:41,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:34:41,171 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:41,171 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-19 04:34:41,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978886158] [2022-03-19 04:34:41,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-19 04:34:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:41,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022520369] [2022-03-19 04:34:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:41,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:41,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857399407] [2022-03-19 04:34:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:41,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:41,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:41,196 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) [2022-03-19 04:34:41,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:34:41,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:34:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-19 04:34:41,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:34:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:34:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022520369] [2022-03-19 04:34:41,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:34:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857399407] [2022-03-19 04:34:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857399407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:41,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:41,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:41,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:34:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978886158] [2022-03-19 04:34:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978886158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:34:41,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:34:41,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:34:41,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003367176] [2022-03-19 04:34:41,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:34:41,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:34:41,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:34:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:34:41,379 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:34:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:34:41,433 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-03-19 04:34:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:34:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-19 04:34:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:34:41,434 INFO L225 Difference]: With dead ends: 201 [2022-03-19 04:34:41,434 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 04:34:41,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:34:41,435 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:34:41,436 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:34:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 04:34:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-19 04:34:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:34:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-03-19 04:34:41,451 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 100 [2022-03-19 04:34:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:34:41,451 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-03-19 04:34:41,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:34:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-03-19 04:34:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:34:41,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:34:41,452 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:34:41,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:34:41,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:34:41,669 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:34:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:34:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-19 04:34:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:34:41,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289009604] [2022-03-19 04:34:41,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:34:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-19 04:34:41,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:34:41,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547690512] [2022-03-19 04:34:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:34:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:34:41,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:34:41,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659378757] [2022-03-19 04:34:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:34:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:34:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:34:41,679 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) [2022-03-19 04:34:41,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:34:41,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:34:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:34:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 04:34:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:34:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 04:34:42,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 04:35:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547690512] [2022-03-19 04:35:21,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659378757] [2022-03-19 04:35:21,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659378757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:35:21,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:35:21,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 04:35:21,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289009604] [2022-03-19 04:35:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289009604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:35:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220417957] [2022-03-19 04:35:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:21,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:35:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:35:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:35:21,834 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:35:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:23,351 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-03-19 04:35:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:35:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-19 04:35:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:23,353 INFO L225 Difference]: With dead ends: 154 [2022-03-19 04:35:23,353 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 04:35:23,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:35:23,354 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:23,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 396 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 04:35:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 04:35:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2022-03-19 04:35:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:35:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-03-19 04:35:23,375 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 107 [2022-03-19 04:35:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:23,377 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-03-19 04:35:23,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:35:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-03-19 04:35:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:35:23,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:23,378 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:23,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:35:23,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 04:35:23,591 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-19 04:35:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620417797] [2022-03-19 04:35:23,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-19 04:35:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235222798] [2022-03-19 04:35:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:23,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319908525] [2022-03-19 04:35:23,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:35:23,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:23,603 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) [2022-03-19 04:35:23,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:35:23,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:35:23,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 04:35:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:35:24,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:35:27,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235222798] [2022-03-19 04:35:27,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319908525] [2022-03-19 04:35:27,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319908525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:35:27,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:35:27,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-03-19 04:35:27,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:27,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620417797] [2022-03-19 04:35:27,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620417797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:27,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:27,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:35:27,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530746670] [2022-03-19 04:35:27,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:27,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:35:27,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:35:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:35:27,026 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:35:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:27,872 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-03-19 04:35:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:35:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2022-03-19 04:35:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:27,874 INFO L225 Difference]: With dead ends: 162 [2022-03-19 04:35:27,874 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 04:35:27,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:35:27,875 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:27,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 549 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:35:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 04:35:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-19 04:35:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 85 states have internal predecessors, (94), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-19 04:35:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-19 04:35:27,900 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 113 [2022-03-19 04:35:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:27,900 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-19 04:35:27,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:35:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-19 04:35:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 04:35:27,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:27,902 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:27,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 04:35:28,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:28,116 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-19 04:35:28,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782049149] [2022-03-19 04:35:28,117 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-19 04:35:28,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152497701] [2022-03-19 04:35:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:28,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:28,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:28,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552491461] [2022-03-19 04:35:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:35:28,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:28,129 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) [2022-03-19 04:35:28,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:35:28,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:35:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:35:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:35:28,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:35:28,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152497701] [2022-03-19 04:35:28,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552491461] [2022-03-19 04:35:28,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552491461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:35:28,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:35:28,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-19 04:35:28,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782049149] [2022-03-19 04:35:28,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782049149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:28,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:28,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:35:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327841354] [2022-03-19 04:35:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:28,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:35:28,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:35:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:35:28,504 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:35:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:28,692 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2022-03-19 04:35:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:35:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-19 04:35:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:28,695 INFO L225 Difference]: With dead ends: 211 [2022-03-19 04:35:28,695 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 04:35:28,698 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:35:28,700 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:28,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:35:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 04:35:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2022-03-19 04:35:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 75 states have call successors, (75), 15 states have call predecessors, (75), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:35:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2022-03-19 04:35:28,760 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 116 [2022-03-19 04:35:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:28,760 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2022-03-19 04:35:28,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:35:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2022-03-19 04:35:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 04:35:28,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:28,761 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:28,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:35:28,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:35:28,974 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-19 04:35:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:28,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674991393] [2022-03-19 04:35:28,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-19 04:35:28,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:28,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999843192] [2022-03-19 04:35:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:28,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:28,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457638080] [2022-03-19 04:35:28,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:35:28,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:28,982 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) [2022-03-19 04:35:28,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:35:29,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:35:29,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 04:35:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:35:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:35:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999843192] [2022-03-19 04:35:29,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457638080] [2022-03-19 04:35:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457638080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:35:29,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:35:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:35:29,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674991393] [2022-03-19 04:35:29,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674991393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:29,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:29,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:35:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270965361] [2022-03-19 04:35:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:29,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:35:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:35:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:35:29,390 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:35:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:29,607 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-03-19 04:35:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:35:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-19 04:35:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:29,608 INFO L225 Difference]: With dead ends: 198 [2022-03-19 04:35:29,609 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 04:35:29,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:35:29,609 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:29,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:35:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 04:35:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-19 04:35:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 73 states have call successors, (73), 18 states have call predecessors, (73), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-19 04:35:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2022-03-19 04:35:29,633 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 122 [2022-03-19 04:35:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:29,633 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2022-03-19 04:35:29,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:35:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2022-03-19 04:35:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 04:35:29,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:29,635 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:29,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:35:29,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:35:29,852 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-19 04:35:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147796255] [2022-03-19 04:35:29,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-19 04:35:29,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26299330] [2022-03-19 04:35:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:29,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951286826] [2022-03-19 04:35:29,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:35:29,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:29,870 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) [2022-03-19 04:35:29,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:35:29,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:35:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 04:35:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:35:30,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:35:31,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26299330] [2022-03-19 04:35:31,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951286826] [2022-03-19 04:35:31,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951286826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:35:31,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:35:31,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-19 04:35:31,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147796255] [2022-03-19 04:35:31,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147796255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:31,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:31,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:35:31,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125310786] [2022-03-19 04:35:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:31,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:35:31,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:35:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:35:31,453 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:35:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:31,893 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-03-19 04:35:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:35:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-03-19 04:35:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:31,895 INFO L225 Difference]: With dead ends: 265 [2022-03-19 04:35:31,895 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 04:35:31,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:35:31,896 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:31,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 562 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:35:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 04:35:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-03-19 04:35:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 140 states have internal predecessors, (158), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:35:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2022-03-19 04:35:31,930 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 127 [2022-03-19 04:35:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:31,931 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2022-03-19 04:35:31,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:35:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2022-03-19 04:35:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:35:31,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:31,932 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:31,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 04:35:32,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:35:32,147 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-19 04:35:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:32,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306915227] [2022-03-19 04:35:32,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-19 04:35:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526783714] [2022-03-19 04:35:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:32,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:32,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677414083] [2022-03-19 04:35:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:35:32,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:32,172 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) [2022-03-19 04:35:32,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:35:32,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:35:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 04:35:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 04:35:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:35:36,140 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:35:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:35:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526783714] [2022-03-19 04:35:41,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:35:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677414083] [2022-03-19 04:35:41,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677414083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:35:41,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:35:41,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 04:35:41,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:35:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306915227] [2022-03-19 04:35:41,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306915227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:35:41,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:35:41,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:35:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456436792] [2022-03-19 04:35:41,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:35:41,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:35:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:35:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:35:41,628 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:35:45,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:35:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:35:46,453 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-03-19 04:35:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:35:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-19 04:35:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:35:46,455 INFO L225 Difference]: With dead ends: 268 [2022-03-19 04:35:46,456 INFO L226 Difference]: Without dead ends: 266 [2022-03-19 04:35:46,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:35:46,456 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 04:35:46,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 392 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 04:35:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-19 04:35:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-03-19 04:35:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:35:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-19 04:35:46,499 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 129 [2022-03-19 04:35:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:35:46,499 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-19 04:35:46,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:35:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-19 04:35:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 04:35:46,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:35:46,500 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:35:46,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:35:46,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:46,716 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:35:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:35:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-19 04:35:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:35:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841015870] [2022-03-19 04:35:46,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:35:46,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-19 04:35:46,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:35:46,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754847091] [2022-03-19 04:35:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:35:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:35:46,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:35:46,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433801714] [2022-03-19 04:35:46,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:35:46,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:35:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:35:46,724 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) [2022-03-19 04:35:46,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:35:46,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:35:46,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:35:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 04:35:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:35:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 103 proven. 117 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-19 04:35:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:14,870 WARN L232 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:37:19,869 WARN L232 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:37:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 114 proven. 83 refuted. 5 times theorem prover too weak. 348 trivial. 0 not checked. [2022-03-19 04:37:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754847091] [2022-03-19 04:37:22,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433801714] [2022-03-19 04:37:22,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433801714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:22,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:22,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-03-19 04:37:22,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841015870] [2022-03-19 04:37:22,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841015870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:22,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:22,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:37:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413633287] [2022-03-19 04:37:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:22,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:37:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:37:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=629, Unknown=2, NotChecked=0, Total=812 [2022-03-19 04:37:22,963 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:37:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:24,948 INFO L93 Difference]: Finished difference Result 277 states and 364 transitions. [2022-03-19 04:37:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:37:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-19 04:37:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:24,951 INFO L225 Difference]: With dead ends: 277 [2022-03-19 04:37:24,951 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 04:37:24,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=260, Invalid=928, Unknown=2, NotChecked=0, Total=1190 [2022-03-19 04:37:24,952 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:24,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 552 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:37:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 04:37:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2022-03-19 04:37:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 04:37:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-03-19 04:37:24,999 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-03-19 04:37:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:24,999 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-03-19 04:37:25,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:37:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-03-19 04:37:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:37:25,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:25,001 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:25,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:25,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:25,220 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-19 04:37:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046184191] [2022-03-19 04:37:25,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-19 04:37:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388556742] [2022-03-19 04:37:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:25,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:25,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388872538] [2022-03-19 04:37:25,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:25,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:25,233 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) [2022-03-19 04:37:25,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:37:25,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 04:37:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:37:26,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:37:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388556742] [2022-03-19 04:37:28,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388872538] [2022-03-19 04:37:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388872538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:28,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:28,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-19 04:37:28,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046184191] [2022-03-19 04:37:28,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046184191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:28,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:37:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132628662] [2022-03-19 04:37:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:28,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:37:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:37:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:37:28,183 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 04:37:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:29,642 INFO L93 Difference]: Finished difference Result 284 states and 377 transitions. [2022-03-19 04:37:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:37:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-19 04:37:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:29,645 INFO L225 Difference]: With dead ends: 284 [2022-03-19 04:37:29,645 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 04:37:29,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:37:29,646 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:29,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 639 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 04:37:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 04:37:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2022-03-19 04:37:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-19 04:37:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 370 transitions. [2022-03-19 04:37:29,686 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 370 transitions. Word has length 135 [2022-03-19 04:37:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:29,687 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 370 transitions. [2022-03-19 04:37:29,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 04:37:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 370 transitions. [2022-03-19 04:37:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:37:29,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:29,688 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:29,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:29,904 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,SelfDestructingSolverStorable20 [2022-03-19 04:37:29,905 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-19 04:37:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:29,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1895403136] [2022-03-19 04:37:29,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-19 04:37:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781907218] [2022-03-19 04:37:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:29,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:29,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871394374] [2022-03-19 04:37:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:37:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:29,929 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) [2022-03-19 04:37:29,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:37:30,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:37:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 04:37:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:31,663 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:37:31,667 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:37:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 144 proven. 111 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:37:32,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 04:37:36,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781907218] [2022-03-19 04:37:36,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871394374] [2022-03-19 04:37:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871394374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:36,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:36,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2022-03-19 04:37:36,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1895403136] [2022-03-19 04:37:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1895403136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:36,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:36,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:37:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258149622] [2022-03-19 04:37:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:36,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:37:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:37:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:37:36,660 INFO L87 Difference]: Start difference. First operand 278 states and 370 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:37:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:41,961 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2022-03-19 04:37:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:37:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-19 04:37:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:41,968 INFO L225 Difference]: With dead ends: 327 [2022-03-19 04:37:41,968 INFO L226 Difference]: Without dead ends: 324 [2022-03-19 04:37:41,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:37:41,969 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:41,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 396 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-19 04:37:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-19 04:37:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-03-19 04:37:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 174 states have internal predecessors, (196), 117 states have call successors, (117), 31 states have call predecessors, (117), 30 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:37:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 428 transitions. [2022-03-19 04:37:42,068 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 428 transitions. Word has length 138 [2022-03-19 04:37:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:42,068 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 428 transitions. [2022-03-19 04:37:42,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:37:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 428 transitions. [2022-03-19 04:37:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 04:37:42,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:42,070 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:42,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 04:37:42,279 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,SelfDestructingSolverStorable21 [2022-03-19 04:37:42,279 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-19 04:37:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282382984] [2022-03-19 04:37:42,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-19 04:37:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445545028] [2022-03-19 04:37:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:42,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:42,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512812475] [2022-03-19 04:37:42,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:37:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:42,288 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) [2022-03-19 04:37:42,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:37:42,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:37:42,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 04:37:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-19 04:37:42,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-19 04:37:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445545028] [2022-03-19 04:37:43,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512812475] [2022-03-19 04:37:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512812475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:43,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-19 04:37:43,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:43,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282382984] [2022-03-19 04:37:43,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282382984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:43,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:37:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408348900] [2022-03-19 04:37:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:43,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:37:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:37:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:37:43,338 INFO L87 Difference]: Start difference. First operand 321 states and 428 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:37:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:43,973 INFO L93 Difference]: Finished difference Result 360 states and 478 transitions. [2022-03-19 04:37:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:37:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-19 04:37:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:43,975 INFO L225 Difference]: With dead ends: 360 [2022-03-19 04:37:43,975 INFO L226 Difference]: Without dead ends: 358 [2022-03-19 04:37:43,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:37:43,975 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:43,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 444 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 04:37:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-19 04:37:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2022-03-19 04:37:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 191 states have (on average 1.130890052356021) internal successors, (216), 192 states have internal predecessors, (216), 129 states have call successors, (129), 34 states have call predecessors, (129), 33 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-19 04:37:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-03-19 04:37:44,041 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 149 [2022-03-19 04:37:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:44,042 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-03-19 04:37:44,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:37:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-03-19 04:37:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:37:44,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:44,043 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:44,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:44,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:44,257 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-03-19 04:37:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822531875] [2022-03-19 04:37:44,258 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-03-19 04:37:44,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:44,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693965096] [2022-03-19 04:37:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:44,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890768163] [2022-03-19 04:37:44,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:44,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:44,266 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:44,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:37:44,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:44,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 04:37:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 170 proven. 175 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-19 04:37:45,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:13,706 WARN L232 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:38:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 157 proven. 119 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-19 04:38:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693965096] [2022-03-19 04:38:23,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890768163] [2022-03-19 04:38:23,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890768163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:23,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:23,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-19 04:38:23,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822531875] [2022-03-19 04:38:23,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822531875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:23,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:23,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:38:23,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096333975] [2022-03-19 04:38:23,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:23,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:38:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:38:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=643, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:38:23,412 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-19 04:38:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:24,579 INFO L93 Difference]: Finished difference Result 363 states and 480 transitions. [2022-03-19 04:38:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:38:24,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2022-03-19 04:38:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:24,581 INFO L225 Difference]: With dead ends: 363 [2022-03-19 04:38:24,581 INFO L226 Difference]: Without dead ends: 361 [2022-03-19 04:38:24,582 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=203, Invalid=852, Unknown=1, NotChecked=0, Total=1056 [2022-03-19 04:38:24,582 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:24,582 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 366 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 04:38:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-19 04:38:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 325. [2022-03-19 04:38:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 177 states have internal predecessors, (199), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:38:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-03-19 04:38:24,637 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 151 [2022-03-19 04:38:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:24,637 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-03-19 04:38:24,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-19 04:38:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-03-19 04:38:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 04:38:24,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:24,639 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:24,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 04:38:24,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:24,856 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-03-19 04:38:24,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:24,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550072880] [2022-03-19 04:38:24,857 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-03-19 04:38:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:24,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310725947] [2022-03-19 04:38:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:24,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:24,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660920892] [2022-03-19 04:38:24,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:38:24,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:24,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:38:24,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:38:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 04:38:24,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 225 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-19 04:38:26,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:34,440 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:45,704 WARN L232 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 74 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:41:28,613 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (not (= |c___VERIFIER_assert_#in~cond| 1)) (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (and (not (= (+ (* v_main_~p~0_BEFORE_CALL_303 v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323) (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190 .cse4) (* v_main_~xy~0_BEFORE_CALL_200 .cse4 v_main_~q~0_BEFORE_CALL_370)) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370) (* v_main_~p~0_BEFORE_CALL_303 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) (* v_main_~yy~0_BEFORE_CALL_190 v_main_~r~0_BEFORE_CALL_323)))) (= .cse3 (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370))))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10))))))) is different from true [2022-03-19 04:43:32,255 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (and (not (= (+ (* v_main_~p~0_BEFORE_CALL_303 v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323) (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190 .cse4) (* v_main_~xy~0_BEFORE_CALL_200 .cse4 v_main_~q~0_BEFORE_CALL_370)) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370) (* v_main_~p~0_BEFORE_CALL_303 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) (* v_main_~yy~0_BEFORE_CALL_190 v_main_~r~0_BEFORE_CALL_323)))) (= .cse3 (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370))))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10)))))))) is different from true [2022-03-19 04:44:25,695 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (= .cse3 (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370)))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10))))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 04:45:01,856 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (= .cse3 (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370)))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10)))))))) is different from true [2022-03-19 04:46:38,356 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse2 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse6 (* .cse2 c_main_~y~0)) (.cse7 (* .cse3 c_main_~x~0))) (let ((.cse4 (* c_main_~q~0 c_main_~xy~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0)) (.cse0 (+ .cse6 .cse7)) (.cse8 (* c_main_~q~0 c_main_~x~0)) (.cse9 (* c_main_~s~0 c_main_~y~0))) (or (not (= c_main_~c~0 .cse0)) (let ((.cse1 (div (+ (* .cse6 2) (* 2 .cse7)) .cse0))) (= (+ (* c_main_~yy~0 .cse1 .cse2) (* .cse1 c_main_~xy~0 .cse3) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse4 .cse5 (* .cse1 .cse3 c_main_~x~0 c_main_~y~0) (* .cse1 .cse2 c_main_~y~0 c_main_~y~0)))) (not (= (+ .cse8 .cse9 (* c_main_~b~0 c_main_~y~0)) (+ .cse4 .cse5 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= (+ .cse6 (* c_main_~xy~0 .cse3) .cse7 (* c_main_~yy~0 .cse2)) (+ .cse6 (* .cse0 c_main_~y~0) .cse7))) (not (= c_main_~b~0 (+ .cse8 .cse9))) (<= (+ (* 3 (* c_main_~p~0 c_main_~x~0)) (* 3 (* c_main_~r~0 c_main_~y~0))) (+ .cse8 .cse9 (* (* c_main_~q~0 c_main_~x~0 c_main_~k~0) 3) (* 3 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))))))) is different from true [2022-03-19 04:47:04,554 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0)) (.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0)) (.cse7 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse8 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (+ (* 2 c_main_~r~0 c_main_~y~0) (* 2 c_main_~p~0 c_main_~x~0) (* (- 2) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 2) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (+ (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0) .cse3 .cse4)))) (= (+ (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0) (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0)))) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))) (not (= (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0)))) (<= (+ (* 3 .cse3) (* 3 .cse4)) (+ .cse5 .cse6 (* .cse7 3) (* 3 .cse8))) (not (= (+ .cse3 .cse4) (+ .cse7 c_main_~c~0 .cse8))))) is different from true [2022-03-19 04:47:34,673 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse6 (* c_main_~q~0 c_main_~x~0)) (.cse7 (* c_main_~s~0 c_main_~y~0)) (.cse5 (+ .cse3 .cse4)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (+ (* 2 c_main_~r~0 c_main_~y~0) (* 2 c_main_~p~0 c_main_~x~0) (* (- 2) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 2) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (+ (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0) .cse3 .cse4)))) (= (+ (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0) (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0)))) (not (= .cse5 c_main_~a~0)) (not (= (+ .cse6 .cse7 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse6 .cse7))) (not (= (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0)))) (<= (+ (* 3 .cse3) (* 3 .cse4)) (+ .cse6 .cse7 (* .cse8 3) (* 3 .cse9))) (not (= .cse5 (+ .cse8 c_main_~c~0 .cse9)))))) is different from true [2022-03-19 04:48:10,935 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~q~0_BEFORE_CALL_381 Int) (v_main_~r~0_BEFORE_CALL_334 Int) (v_main_~xy~0_BEFORE_CALL_211 Int) (v_main_~yy~0_BEFORE_CALL_201 Int) (v_main_~y~0_BEFORE_CALL_405 Int) (v_main_~x~0_BEFORE_CALL_399 Int) (v_main_~k~0_BEFORE_CALL_258 Int) (v_main_~s~0_BEFORE_CALL_387 Int) (v_main_~p~0_BEFORE_CALL_314 Int)) (let ((.cse2 (* v_main_~xy~0_BEFORE_CALL_211 v_main_~q~0_BEFORE_CALL_381)) (.cse3 (* v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201)) (.cse6 (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)) (.cse0 (* v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)) (.cse7 (* v_main_~k~0_BEFORE_CALL_258 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (.cse1 (* v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (.cse5 (* v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334)) (.cse4 (* v_main_~p~0_BEFORE_CALL_314 v_main_~x~0_BEFORE_CALL_399))) (or (not (= (+ .cse0 (* (+ .cse0 .cse1) v_main_~y~0_BEFORE_CALL_405) .cse1) (+ .cse2 .cse0 .cse3 .cse1))) (<= (+ (* 3 .cse4) (* .cse5 3)) (+ .cse0 (* .cse6 3) .cse1 (* 3 .cse7))) (let ((.cse8 (div (+ (* v_main_~p~0_BEFORE_CALL_314 2 v_main_~x~0_BEFORE_CALL_399) (* v_main_~y~0_BEFORE_CALL_405 2 v_main_~r~0_BEFORE_CALL_334) (* v_main_~k~0_BEFORE_CALL_258 (- 2) v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) (* v_main_~k~0_BEFORE_CALL_258 (- 2) v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (+ .cse5 (* (- 1) v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) .cse4 (* (- 1) v_main_~k~0_BEFORE_CALL_258 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381))))) (= (+ .cse2 (* v_main_~k~0_BEFORE_CALL_258 v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201 .cse8) (* v_main_~p~0_BEFORE_CALL_314 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 .cse8) .cse3 (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334 .cse8) (* v_main_~k~0_BEFORE_CALL_258 v_main_~xy~0_BEFORE_CALL_211 .cse8 v_main_~q~0_BEFORE_CALL_381)) (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387 .cse8) (* v_main_~yy~0_BEFORE_CALL_201 v_main_~r~0_BEFORE_CALL_334 .cse8) (* v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381) (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 .cse8 v_main_~q~0_BEFORE_CALL_381) (* v_main_~p~0_BEFORE_CALL_314 v_main_~xy~0_BEFORE_CALL_211 .cse8) (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)))) (not (= (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~xy~0_BEFORE_CALL_211 v_main_~q~0_BEFORE_CALL_381) (* v_main_~k~0_BEFORE_CALL_258 v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201) (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334) (* v_main_~p~0_BEFORE_CALL_314 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399)) (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) (* v_main_~p~0_BEFORE_CALL_314 v_main_~xy~0_BEFORE_CALL_211) (* v_main_~yy~0_BEFORE_CALL_201 v_main_~r~0_BEFORE_CALL_334) (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)))) (<= (+ .cse6 .cse0 .cse7 .cse1) (+ .cse5 .cse4)))))) is different from true