/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/egcd-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:29:34,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:29:34,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:29:34,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 16:29:34,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 16:29:34,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 16:29:34,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 16:29:34,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 16:29:34,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 16:29:34,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 16:29:34,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 16:29:34,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 16:29:34,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:29:34,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:29:34,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:29:34,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:29:34,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:29:34,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:29:34,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:29:34,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:29:34,803 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:29:34,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:29:34,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:29:34,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:29:34,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:29:34,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:29:34,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:29:34,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:29:34,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:29:34,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:29:34,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:29:34,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:29:34,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:29:34,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:29:34,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:29:34,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:29:34,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:29:34,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:29:34,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:29:34,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:29:34,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:29:34,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:29:34,839 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:29:34,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:29:34,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:29:35,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:29:35,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:29:35,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:29:35,020 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:29:35,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2022-04-06 16:29:35,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381a6876b/6a9995ae166f48b899b7434cf27c903f/FLAG042a67e05 [2022-04-06 16:29:35,434 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:29:35,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2022-04-06 16:29:35,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381a6876b/6a9995ae166f48b899b7434cf27c903f/FLAG042a67e05 [2022-04-06 16:29:35,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381a6876b/6a9995ae166f48b899b7434cf27c903f [2022-04-06 16:29:35,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:29:35,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:29:35,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:29:35,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:29:35,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:29:35,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475c7c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35, skipping insertion in model container [2022-04-06 16:29:35,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:29:35,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:29:35,609 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/egcd-ll_valuebound50.c[489,502] [2022-04-06 16:29:35,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:29:35,642 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:29:35,652 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/egcd-ll_valuebound50.c[489,502] [2022-04-06 16:29:35,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:29:35,677 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:29:35,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35 WrapperNode [2022-04-06 16:29:35,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:29:35,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:29:35,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:29:35,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:29:35,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:29:35,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:29:35,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:29:35,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:29:35,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (1/1) ... [2022-04-06 16:29:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:29:35,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:35,733 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) [2022-04-06 16:29:35,751 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 [2022-04-06 16:29:35,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:29:35,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:29:35,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:29:35,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:29:35,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:29:35,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:29:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:29:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:29:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:29:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:29:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:29:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:29:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:29:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:29:35,810 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:29:35,811 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:29:35,903 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:29:35,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:29:35,906 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:29:35,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:29:35 BoogieIcfgContainer [2022-04-06 16:29:35,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:29:35,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:29:35,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:29:35,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:29:35,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:29:35" (1/3) ... [2022-04-06 16:29:35,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f040f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:29:35, skipping insertion in model container [2022-04-06 16:29:35,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:29:35" (2/3) ... [2022-04-06 16:29:35,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f040f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:29:35, skipping insertion in model container [2022-04-06 16:29:35,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:29:35" (3/3) ... [2022-04-06 16:29:35,913 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.c [2022-04-06 16:29:35,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:29:35,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:29:35,940 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:29:35,944 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 [2022-04-06 16:29:35,945 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:29:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:29:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:29:35,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:35,958 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:35,958 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-04-06 16:29:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093040156] [2022-04-06 16:29:35,973 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:35,973 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-04-06 16:29:35,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:35,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383981910] [2022-04-06 16:29:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:29:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:29:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:29:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:29:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:29:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:29:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:29:36,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:36,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383981910] [2022-04-06 16:29:36,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383981910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:29:36,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:36,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093040156] [2022-04-06 16:29:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093040156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:29:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971773806] [2022-04-06 16:29:36,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:36,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:29:36,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:29:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:29:36,147 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:29:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:36,231 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-04-06 16:29:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:29:36,237 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:29:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:36,244 INFO L225 Difference]: With dead ends: 67 [2022-04-06 16:29:36,244 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 16:29:36,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:29:36,251 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:36,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:29:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 16:29:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 16:29:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:29:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 16:29:36,287 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-04-06 16:29:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:36,287 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 16:29:36,288 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:29:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 16:29:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:29:36,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:36,290 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:36,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:29:36,291 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-04-06 16:29:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:36,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313966092] [2022-04-06 16:29:36,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-04-06 16:29:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87208384] [2022-04-06 16:29:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:36,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:36,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628919347] [2022-04-06 16:29:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:36,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:36,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:36,335 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) [2022-04-06 16:29:36,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:29:36,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:29:36,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:29:36,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:29:36,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:29:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87208384] [2022-04-06 16:29:36,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628919347] [2022-04-06 16:29:36,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628919347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:36,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:36,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313966092] [2022-04-06 16:29:36,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313966092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074733410] [2022-04-06 16:29:36,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:36,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:29:36,491 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:29:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:36,536 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-04-06 16:29:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:36,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-06 16:29:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:36,538 INFO L225 Difference]: With dead ends: 48 [2022-04-06 16:29:36,538 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 16:29:36,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:29:36,539 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:36,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 16:29:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 16:29:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:29:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-04-06 16:29:36,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-04-06 16:29:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:36,549 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-04-06 16:29:36,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:29:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-04-06 16:29:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 16:29:36,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:36,550 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-06 16:29:36,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:36,767 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 [2022-04-06 16:29:36,767 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-04-06 16:29:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323440648] [2022-04-06 16:29:36,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-04-06 16:29:36,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:36,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946117743] [2022-04-06 16:29:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:36,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826105658] [2022-04-06 16:29:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:36,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:36,781 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) [2022-04-06 16:29:36,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:29:36,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:36,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:29:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:29:36,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:29:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946117743] [2022-04-06 16:29:36,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826105658] [2022-04-06 16:29:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826105658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:36,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323440648] [2022-04-06 16:29:36,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323440648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:36,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:36,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721039572] [2022-04-06 16:29:36,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:36,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:29:36,945 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:29:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:36,985 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-04-06 16:29:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 16:29:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:36,987 INFO L225 Difference]: With dead ends: 52 [2022-04-06 16:29:36,987 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 16:29:36,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:29:36,988 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:36,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 16:29:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 16:29:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:29:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-04-06 16:29:36,996 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-04-06 16:29:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:36,996 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-04-06 16:29:36,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:29:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-04-06 16:29:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:29:36,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:36,998 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-04-06 16:29:37,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:37,211 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 [2022-04-06 16:29:37,212 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-04-06 16:29:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220315357] [2022-04-06 16:29:37,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-04-06 16:29:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:37,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764874945] [2022-04-06 16:29:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:37,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981772888] [2022-04-06 16:29:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:37,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:37,226 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) [2022-04-06 16:29:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:29:37,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:37,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:37,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:29:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:29:37,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:29:37,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764874945] [2022-04-06 16:29:37,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981772888] [2022-04-06 16:29:37,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981772888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:37,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:37,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:37,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:37,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220315357] [2022-04-06 16:29:37,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220315357] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:37,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:37,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222416148] [2022-04-06 16:29:37,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:37,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:37,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:37,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:29:37,380 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:29:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:37,434 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-04-06 16:29:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 16:29:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:37,438 INFO L225 Difference]: With dead ends: 74 [2022-04-06 16:29:37,438 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 16:29:37,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:29:37,439 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:37,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 16:29:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 16:29:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:29:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-04-06 16:29:37,464 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-04-06 16:29:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:37,466 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-04-06 16:29:37,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:29:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-04-06 16:29:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 16:29:37,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:37,469 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 16:29:37,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:37,687 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 [2022-04-06 16:29:37,687 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-04-06 16:29:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134750565] [2022-04-06 16:29:37,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-04-06 16:29:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:37,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797216511] [2022-04-06 16:29:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:37,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351580971] [2022-04-06 16:29:37,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:37,715 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) [2022-04-06 16:29:37,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:29:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:29:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:29:37,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:29:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:37,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797216511] [2022-04-06 16:29:37,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:37,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351580971] [2022-04-06 16:29:37,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351580971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:37,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:37,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:37,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:37,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134750565] [2022-04-06 16:29:37,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134750565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:37,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:37,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780986304] [2022-04-06 16:29:37,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:37,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:29:37,851 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:29:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:37,888 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 16:29:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-04-06 16:29:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:37,892 INFO L225 Difference]: With dead ends: 76 [2022-04-06 16:29:37,892 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 16:29:37,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:29:37,893 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:37,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 16:29:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 16:29:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:29:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-04-06 16:29:37,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-04-06 16:29:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:37,907 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-04-06 16:29:37,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:29:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-04-06 16:29:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 16:29:37,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:37,909 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-04-06 16:29:37,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:38,127 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 [2022-04-06 16:29:38,127 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:38,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-04-06 16:29:38,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:38,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803837197] [2022-04-06 16:29:38,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-04-06 16:29:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:38,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819959994] [2022-04-06 16:29:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:38,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:38,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:38,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355467043] [2022-04-06 16:29:38,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:38,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:38,144 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) [2022-04-06 16:29:38,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:29:38,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:29:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 16:29:38,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:29:38,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819959994] [2022-04-06 16:29:38,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355467043] [2022-04-06 16:29:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355467043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:38,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:38,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803837197] [2022-04-06 16:29:38,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803837197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:38,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080753918] [2022-04-06 16:29:38,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:38,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:29:38,314 INFO L87 Difference]: Start difference. First operand 74 states and 101 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) [2022-04-06 16:29:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:38,351 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-04-06 16:29:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:38,351 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 51 [2022-04-06 16:29:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:38,352 INFO L225 Difference]: With dead ends: 84 [2022-04-06 16:29:38,352 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 16:29:38,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:29:38,353 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:38,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 16:29:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 16:29:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:29:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-04-06 16:29:38,363 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-04-06 16:29:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:38,363 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-04-06 16:29:38,363 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) [2022-04-06 16:29:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-04-06 16:29:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 16:29:38,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:38,364 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-06 16:29:38,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:38,570 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 [2022-04-06 16:29:38,570 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-04-06 16:29:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153751564] [2022-04-06 16:29:38,571 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-04-06 16:29:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584343194] [2022-04-06 16:29:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:38,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274400704] [2022-04-06 16:29:38,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:38,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:38,585 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) [2022-04-06 16:29:38,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:29:38,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:29:38,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:29:38,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:29:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584343194] [2022-04-06 16:29:38,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274400704] [2022-04-06 16:29:38,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274400704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:38,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:38,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:29:38,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153751564] [2022-04-06 16:29:38,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153751564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:38,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:38,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:29:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754604107] [2022-04-06 16:29:38,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:38,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:29:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:29:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:29:38,869 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:29:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:38,965 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-04-06 16:29:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:29:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-04-06 16:29:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:38,968 INFO L225 Difference]: With dead ends: 88 [2022-04-06 16:29:38,968 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 16:29:38,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:29:38,970 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:38,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 129 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:29:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 16:29:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 16:29:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 16:29:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-04-06 16:29:38,988 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-04-06 16:29:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:38,988 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-04-06 16:29:38,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:29:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-04-06 16:29:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 16:29:38,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:38,994 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:39,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:39,210 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 [2022-04-06 16:29:39,211 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-04-06 16:29:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702184021] [2022-04-06 16:29:39,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-04-06 16:29:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020773881] [2022-04-06 16:29:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:39,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:39,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:39,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954913716] [2022-04-06 16:29:39,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:39,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:39,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:39,221 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) [2022-04-06 16:29:39,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:29:39,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:39,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:29:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:29:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:29:39,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020773881] [2022-04-06 16:29:39,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954913716] [2022-04-06 16:29:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954913716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:39,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:39,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 16:29:39,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702184021] [2022-04-06 16:29:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702184021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:39,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:39,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:29:39,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775261668] [2022-04-06 16:29:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:39,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:29:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:29:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:29:39,499 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:29:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:39,581 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-04-06 16:29:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:29:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-04-06 16:29:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:39,584 INFO L225 Difference]: With dead ends: 118 [2022-04-06 16:29:39,584 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 16:29:39,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:29:39,585 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:39,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 170 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:29:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 16:29:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-04-06 16:29:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 16:29:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-04-06 16:29:39,595 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-04-06 16:29:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:39,596 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-04-06 16:29:39,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:29:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-04-06 16:29:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:29:39,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:39,596 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-04-06 16:29:39,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:39,811 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 [2022-04-06 16:29:39,812 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-04-06 16:29:39,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:39,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119439268] [2022-04-06 16:29:39,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-04-06 16:29:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:39,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059679708] [2022-04-06 16:29:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:39,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:39,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672639456] [2022-04-06 16:29:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:39,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:39,823 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) [2022-04-06 16:29:39,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:29:39,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:29:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:29:40,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:29:40,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059679708] [2022-04-06 16:29:40,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672639456] [2022-04-06 16:29:40,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672639456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:40,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:40,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 16:29:40,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119439268] [2022-04-06 16:29:40,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119439268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:40,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:40,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:29:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169966775] [2022-04-06 16:29:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:40,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:29:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:29:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:29:40,120 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:29:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:40,193 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-04-06 16:29:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:29:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-04-06 16:29:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:40,195 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:29:40,195 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 16:29:40,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:29:40,196 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:40,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:29:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 16:29:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 16:29:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 16:29:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-04-06 16:29:40,207 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-04-06 16:29:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:40,207 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-04-06 16:29:40,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:29:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-04-06 16:29:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:29:40,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:40,208 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:40,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 16:29:40,433 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 [2022-04-06 16:29:40,434 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-04-06 16:29:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1785156163] [2022-04-06 16:29:40,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:40,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-04-06 16:29:40,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:40,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102588877] [2022-04-06 16:29:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:40,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:40,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810667465] [2022-04-06 16:29:40,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:40,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:40,453 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) [2022-04-06 16:29:40,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:29:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:29:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 16:29:40,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 16:29:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102588877] [2022-04-06 16:29:40,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810667465] [2022-04-06 16:29:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810667465] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:29:40,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:29:40,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 16:29:40,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1785156163] [2022-04-06 16:29:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1785156163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:40,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:40,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:29:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279949116] [2022-04-06 16:29:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:40,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:29:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:29:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:29:40,795 INFO L87 Difference]: Start difference. First operand 131 states and 167 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, (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) [2022-04-06 16:29:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:40,830 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-04-06 16:29:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:29:40,830 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, (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 69 [2022-04-06 16:29:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:40,831 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:29:40,831 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 16:29:40,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:29:40,832 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:40,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:29:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 16:29:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 16:29:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:29:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-04-06 16:29:40,842 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-04-06 16:29:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:40,843 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-04-06 16:29:40,843 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, (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) [2022-04-06 16:29:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-04-06 16:29:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:29:40,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:40,843 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:40,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:41,059 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 [2022-04-06 16:29:41,059 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-04-06 16:29:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072020702] [2022-04-06 16:29:41,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-04-06 16:29:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:41,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325889730] [2022-04-06 16:29:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:41,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:41,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204508818] [2022-04-06 16:29:41,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:29:41,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:41,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:41,075 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) [2022-04-06 16:29:41,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:29:41,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:29:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:29:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 16:29:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 16:29:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325889730] [2022-04-06 16:29:41,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204508818] [2022-04-06 16:29:41,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204508818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:41,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:41,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-04-06 16:29:41,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072020702] [2022-04-06 16:29:41,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072020702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:41,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:41,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:29:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545496016] [2022-04-06 16:29:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:41,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:29:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:29:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:29:41,879 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:42,127 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-04-06 16:29:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:29:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-04-06 16:29:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:42,128 INFO L225 Difference]: With dead ends: 166 [2022-04-06 16:29:42,129 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 16:29:42,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:29:42,129 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:42,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:29:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 16:29:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-04-06 16:29:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 91 states have internal predecessors, (101), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 16:29:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-04-06 16:29:42,140 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-04-06 16:29:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:42,141 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-04-06 16:29:42,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-04-06 16:29:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:29:42,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:42,142 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:42,358 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 [2022-04-06 16:29:42,359 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-04-06 16:29:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:42,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739587492] [2022-04-06 16:29:42,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-04-06 16:29:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667057067] [2022-04-06 16:29:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:42,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:42,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310062147] [2022-04-06 16:29:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:42,368 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) [2022-04-06 16:29:42,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:29:42,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:29:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 16:29:43,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:43,533 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:29:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667057067] [2022-04-06 16:29:44,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310062147] [2022-04-06 16:29:44,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310062147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:29:44,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:29:44,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 16:29:44,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739587492] [2022-04-06 16:29:44,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739587492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:44,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:44,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:29:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138503878] [2022-04-06 16:29:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:44,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:29:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:29:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:29:44,189 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:45,048 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-04-06 16:29:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:29:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-04-06 16:29:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:45,049 INFO L225 Difference]: With dead ends: 184 [2022-04-06 16:29:45,049 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 16:29:45,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:29:45,050 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:45,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 196 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:29:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 16:29:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-04-06 16:29:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.14) internal successors, (114), 103 states have internal predecessors, (114), 45 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 16:29:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2022-04-06 16:29:45,066 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 74 [2022-04-06 16:29:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:45,066 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2022-04-06 16:29:45,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2022-04-06 16:29:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 16:29:45,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:45,067 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-04-06 16:29:45,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 16:29:45,282 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 [2022-04-06 16:29:45,283 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-04-06 16:29:45,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:45,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159133312] [2022-04-06 16:29:45,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-04-06 16:29:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:45,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657856518] [2022-04-06 16:29:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:45,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499191880] [2022-04-06 16:29:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:29:45,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:45,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:45,296 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) [2022-04-06 16:29:45,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:29:45,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:29:45,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 16:29:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 16:29:45,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-04-06 16:29:45,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657856518] [2022-04-06 16:29:45,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499191880] [2022-04-06 16:29:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499191880] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:45,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:45,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 16:29:45,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159133312] [2022-04-06 16:29:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159133312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:45,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:45,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:29:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791439242] [2022-04-06 16:29:45,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:45,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:29:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:29:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:29:45,647 INFO L87 Difference]: Start difference. First operand 168 states and 202 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:45,878 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2022-04-06 16:29:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:29:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-04-06 16:29:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:45,880 INFO L225 Difference]: With dead ends: 182 [2022-04-06 16:29:45,880 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 16:29:45,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:29:45,880 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:45,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:29:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 16:29:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-04-06 16:29:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 16:29:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-04-06 16:29:45,921 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 79 [2022-04-06 16:29:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:45,922 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-04-06 16:29:45,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:29:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-04-06 16:29:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 16:29:45,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:45,923 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-04-06 16:29:45,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:46,143 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 [2022-04-06 16:29:46,143 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-04-06 16:29:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81433065] [2022-04-06 16:29:46,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-04-06 16:29:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106450387] [2022-04-06 16:29:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:46,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:46,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:46,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882494381] [2022-04-06 16:29:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:46,152 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) [2022-04-06 16:29:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:29:46,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:46,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 16:29:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 16:29:46,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 16:29:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106450387] [2022-04-06 16:29:46,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882494381] [2022-04-06 16:29:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882494381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:46,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:46,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 16:29:46,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81433065] [2022-04-06 16:29:46,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81433065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:46,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:46,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:29:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738037318] [2022-04-06 16:29:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:46,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:29:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:29:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:29:46,926 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:29:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:47,376 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-04-06 16:29:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:29:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-04-06 16:29:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:47,386 INFO L225 Difference]: With dead ends: 171 [2022-04-06 16:29:47,386 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 16:29:47,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:29:47,387 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:47,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 16:29:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-04-06 16:29:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.092783505154639) internal successors, (106), 101 states have internal predecessors, (106), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 16:29:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2022-04-06 16:29:47,409 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 79 [2022-04-06 16:29:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:47,409 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2022-04-06 16:29:47,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:29:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2022-04-06 16:29:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:29:47,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:47,411 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:47,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:47,623 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 [2022-04-06 16:29:47,623 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-04-06 16:29:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871378006] [2022-04-06 16:29:47,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-04-06 16:29:47,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:47,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443649925] [2022-04-06 16:29:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:47,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:47,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:47,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178298793] [2022-04-06 16:29:47,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:47,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:47,635 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) [2022-04-06 16:29:47,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:29:47,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:47,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 16:29:47,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 16:29:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 16:29:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:49,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443649925] [2022-04-06 16:29:49,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:49,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178298793] [2022-04-06 16:29:49,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178298793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:49,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:49,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 16:29:49,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871378006] [2022-04-06 16:29:49,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871378006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:49,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:49,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:29:49,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021573761] [2022-04-06 16:29:49,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:49,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:29:49,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:29:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:29:49,342 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 16:29:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:50,282 INFO L93 Difference]: Finished difference Result 189 states and 221 transitions. [2022-04-06 16:29:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:29:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-04-06 16:29:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:50,299 INFO L225 Difference]: With dead ends: 189 [2022-04-06 16:29:50,299 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 16:29:50,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:29:50,302 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:50,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:29:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 16:29:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-04-06 16:29:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 118 states have internal predecessors, (124), 48 states have call successors, (48), 26 states have call predecessors, (48), 25 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 16:29:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 219 transitions. [2022-04-06 16:29:50,329 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 219 transitions. Word has length 92 [2022-04-06 16:29:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:50,330 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 219 transitions. [2022-04-06 16:29:50,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 16:29:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 219 transitions. [2022-04-06 16:29:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:29:50,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:50,331 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:50,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:50,547 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 [2022-04-06 16:29:50,547 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-04-06 16:29:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763465000] [2022-04-06 16:29:50,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-04-06 16:29:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931044759] [2022-04-06 16:29:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:50,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:50,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:50,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999024347] [2022-04-06 16:29:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:50,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:50,560 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) [2022-04-06 16:29:50,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:29:50,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:29:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 16:29:51,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 16:29:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931044759] [2022-04-06 16:29:51,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999024347] [2022-04-06 16:29:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999024347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:51,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 16:29:51,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763465000] [2022-04-06 16:29:51,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763465000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:51,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:29:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860428724] [2022-04-06 16:29:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:51,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:29:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:29:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:29:51,584 INFO L87 Difference]: Start difference. First operand 187 states and 219 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:29:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:51,989 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-04-06 16:29:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:29:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-04-06 16:29:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:51,991 INFO L225 Difference]: With dead ends: 224 [2022-04-06 16:29:51,991 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 16:29:51,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:29:51,991 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:51,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 16:29:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-04-06 16:29:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 140 states have internal predecessors, (150), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:29:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-04-06 16:29:52,033 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 92 [2022-04-06 16:29:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:52,033 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-04-06 16:29:52,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:29:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-04-06 16:29:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 16:29:52,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:52,034 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:52,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 16:29:52,250 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 [2022-04-06 16:29:52,250 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-04-06 16:29:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:52,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908031497] [2022-04-06 16:29:52,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-04-06 16:29:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:52,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109568553] [2022-04-06 16:29:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:52,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894372353] [2022-04-06 16:29:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:29:52,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:52,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:52,258 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) [2022-04-06 16:29:52,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:29:52,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:29:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:52,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 16:29:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:52,508 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:29:52,509 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:29:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 16:29:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:55,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:10,504 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) is different from true [2022-04-06 16:32:14,413 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 16:32:32,453 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0))))) is different from true [2022-04-06 16:32:35,432 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0))) (and (or (not (= (mod (+ (- 1) (* c_main_~p~0 c_main_~r~0)) c_main_~r~0) 0)) (= c_main_~r~0 0) .cse0) (or (= c_main_~p~0 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* (+ (* (- 1) c_main_~p~0) main_~q~0) c_main_~r~0) 1) c_main_~p~0) 0))) .cse0))) is different from true [2022-04-06 16:32:35,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:35,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109568553] [2022-04-06 16:32:35,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894372353] [2022-04-06 16:32:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894372353] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:32:35,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:32:35,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:32:35,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908031497] [2022-04-06 16:32:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908031497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:35,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:35,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:32:35,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621555578] [2022-04-06 16:32:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:35,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:32:35,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:32:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=168, Unknown=7, NotChecked=116, Total=342 [2022-04-06 16:32:35,889 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:32:38,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:33:04,566 WARN L232 SmtUtils]: Spent 26.42s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:33:06,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:33:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:07,082 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2022-04-06 16:33:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:33:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-04-06 16:33:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:07,083 INFO L225 Difference]: With dead ends: 254 [2022-04-06 16:33:07,083 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 16:33:07,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=71, Invalid=244, Unknown=7, NotChecked=140, Total=462 [2022-04-06 16:33:07,084 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:07,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 16:33:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 16:33:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 226. [2022-04-06 16:33:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 144 states have internal predecessors, (151), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 16:33:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 262 transitions. [2022-04-06 16:33:07,125 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 262 transitions. Word has length 92 [2022-04-06 16:33:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:07,125 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 262 transitions. [2022-04-06 16:33:07,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:33:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 262 transitions. [2022-04-06 16:33:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:33:07,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:07,126 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:33:07,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 16:33:07,332 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 [2022-04-06 16:33:07,332 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-04-06 16:33:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406428726] [2022-04-06 16:33:07,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-04-06 16:33:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:07,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362114097] [2022-04-06 16:33:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:07,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:07,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:07,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133091169] [2022-04-06 16:33:07,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:33:07,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:07,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:07,339 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) [2022-04-06 16:33:07,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:33:07,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:33:07,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:33:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-04-06 16:33:18,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-04-06 16:33:19,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362114097] [2022-04-06 16:33:19,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133091169] [2022-04-06 16:33:19,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133091169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:33:19,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:33:19,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 16:33:19,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406428726] [2022-04-06 16:33:19,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406428726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:19,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:19,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:33:19,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858101901] [2022-04-06 16:33:19,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:19,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:33:19,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:33:19,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:33:19,303 INFO L87 Difference]: Start difference. First operand 226 states and 262 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 16:33:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:20,027 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2022-04-06 16:33:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:33:20,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-04-06 16:33:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:20,042 INFO L225 Difference]: With dead ends: 248 [2022-04-06 16:33:20,042 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 16:33:20,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:33:20,043 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:20,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 209 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2022-04-06 16:33:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 16:33:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-04-06 16:33:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 150 states have (on average 1.1) internal successors, (165), 156 states have internal predecessors, (165), 62 states have call successors, (62), 34 states have call predecessors, (62), 33 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:33:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 288 transitions. [2022-04-06 16:33:20,089 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 288 transitions. Word has length 97 [2022-04-06 16:33:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:20,089 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 288 transitions. [2022-04-06 16:33:20,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 16:33:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 288 transitions. [2022-04-06 16:33:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:33:20,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:20,091 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:33:20,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:33:20,299 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 [2022-04-06 16:33:20,299 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-04-06 16:33:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892855877] [2022-04-06 16:33:20,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-04-06 16:33:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393015481] [2022-04-06 16:33:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:20,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:20,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008714675] [2022-04-06 16:33:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:33:20,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:20,309 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) [2022-04-06 16:33:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:33:20,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:33:20,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:20,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:33:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 16:33:21,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 16:33:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393015481] [2022-04-06 16:33:21,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008714675] [2022-04-06 16:33:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008714675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:33:21,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:33:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-04-06 16:33:21,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892855877] [2022-04-06 16:33:21,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892855877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:21,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:21,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:33:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321927826] [2022-04-06 16:33:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:21,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:33:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:33:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:33:21,345 INFO L87 Difference]: Start difference. First operand 246 states and 288 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:33:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:22,149 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-04-06 16:33:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:33:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-04-06 16:33:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:22,151 INFO L225 Difference]: With dead ends: 276 [2022-04-06 16:33:22,151 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 16:33:22,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:33:22,151 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:22,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:33:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 16:33:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 257. [2022-04-06 16:33:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 164 states have internal predecessors, (172), 64 states have call successors, (64), 36 states have call predecessors, (64), 35 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 16:33:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 299 transitions. [2022-04-06 16:33:22,201 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 299 transitions. Word has length 97 [2022-04-06 16:33:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:22,202 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 299 transitions. [2022-04-06 16:33:22,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:33:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 299 transitions. [2022-04-06 16:33:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:33:22,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:22,203 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:33:22,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:33:22,419 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 [2022-04-06 16:33:22,419 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-04-06 16:33:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2039195717] [2022-04-06 16:33:22,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-04-06 16:33:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411612269] [2022-04-06 16:33:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:22,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664241936] [2022-04-06 16:33:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:33:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:22,426 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) [2022-04-06 16:33:22,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:33:22,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:33:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 16:33:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 16:33:22,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:22,909 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411612269] [2022-04-06 16:33:27,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664241936] [2022-04-06 16:33:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664241936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:33:27,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:33:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:33:27,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2039195717] [2022-04-06 16:33:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2039195717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:27,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:33:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212910844] [2022-04-06 16:33:27,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:27,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:33:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:33:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=165, Unknown=2, NotChecked=0, Total=210 [2022-04-06 16:33:27,173 INFO L87 Difference]: Start difference. First operand 257 states and 299 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:33:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:27,509 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-04-06 16:33:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:33:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-04-06 16:33:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:27,511 INFO L225 Difference]: With dead ends: 276 [2022-04-06 16:33:27,511 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 16:33:27,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-04-06 16:33:27,511 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:27,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 137 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:33:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 16:33:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-04-06 16:33:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 149 states have (on average 1.0939597315436242) internal successors, (163), 154 states have internal predecessors, (163), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 16:33:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2022-04-06 16:33:27,554 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 97 [2022-04-06 16:33:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:27,555 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2022-04-06 16:33:27,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:33:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2022-04-06 16:33:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:33:27,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:27,556 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:33:27,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:33:27,759 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 [2022-04-06 16:33:27,760 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-04-06 16:33:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:27,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203563781] [2022-04-06 16:33:27,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-04-06 16:33:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:27,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216067001] [2022-04-06 16:33:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:27,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:27,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47365543] [2022-04-06 16:33:27,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:33:27,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:27,767 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) [2022-04-06 16:33:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:33:28,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:33:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:28,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 16:33:28,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:40,611 WARN L232 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:36:10,984 WARN L833 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~r~0_BEFORE_CALL_171_49 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 Int) (aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95 Int) (aux_div_v_main_~p~0_BEFORE_CALL_174_45 Int) (aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 Int) (aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 Int) (v_main_~x~0_BEFORE_CALL_204 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69 Int) (aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 Int) (v_main_~y~0_BEFORE_CALL_184 Int)) (let ((.cse2 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 2)) (.cse8 (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69))) (let ((.cse3 (+ (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 2) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151)) (.cse4 (+ aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 (* 2 aux_div_v_main_~r~0_BEFORE_CALL_171_49))) (.cse6 (* 2 aux_div_v_main_~p~0_BEFORE_CALL_174_45)) (.cse1 (+ .cse8 (* 2 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (.cse0 (* 2 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95)) (.cse7 (+ (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 2) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151)) (.cse5 (+ 2 .cse2))) (and (<= 0 (+ (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 v_main_~y~0_BEFORE_CALL_184) (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69) (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (<= .cse0 .cse1) (<= .cse2 .cse3) (< .cse4 .cse5) (<= .cse6 .cse1) (<= 1 |c___VERIFIER_assert_#in~cond|) (< .cse3 .cse5) (<= .cse2 .cse4) (= (+ (* (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69) 2) (* aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151) aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 1) 0) (< (+ (* (* aux_div_v_main_~p~0_BEFORE_CALL_174_45 v_main_~x~0_BEFORE_CALL_204) 2) (* (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 v_main_~y~0_BEFORE_CALL_184) 2)) v_main_~y~0_BEFORE_CALL_184) (< .cse1 (+ 2 .cse6)) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151) (< v_main_~y~0_BEFORE_CALL_184 v_main_~x~0_BEFORE_CALL_204) (< .cse1 (+ 2 .cse0)) (<= .cse2 .cse7) (< .cse8 2) (not (= (+ (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95) (* v_main_~y~0_BEFORE_CALL_184 aux_div_v_main_~r~0_BEFORE_CALL_171_49)) 0)) (< .cse7 .cse5))))) is different from false [2022-04-06 16:36:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 16:36:14,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216067001] [2022-04-06 16:36:27,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47365543] [2022-04-06 16:36:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47365543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:36:27,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:36:27,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 16:36:27,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:27,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203563781] [2022-04-06 16:36:27,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203563781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:27,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:27,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:36:27,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622036760] [2022-04-06 16:36:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:27,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:36:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:36:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=314, Unknown=3, NotChecked=36, Total=420 [2022-04-06 16:36:27,662 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 16:36:40,250 WARN L232 SmtUtils]: Spent 10.27s on a formula simplification. DAG size of input: 60 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:36:42,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:43,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:45,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:48,345 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (exists ((aux_div_v_main_~r~0_BEFORE_CALL_171_49 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 Int) (aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95 Int) (aux_div_v_main_~p~0_BEFORE_CALL_174_45 Int) (aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 Int) (aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 Int) (v_main_~x~0_BEFORE_CALL_204 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69 Int) (aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 Int) (v_main_~y~0_BEFORE_CALL_184 Int)) (let ((.cse2 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 2)) (.cse8 (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69))) (let ((.cse3 (+ (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 2) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151)) (.cse4 (+ aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 (* 2 aux_div_v_main_~r~0_BEFORE_CALL_171_49))) (.cse6 (* 2 aux_div_v_main_~p~0_BEFORE_CALL_174_45)) (.cse1 (+ .cse8 (* 2 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (.cse0 (* 2 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95)) (.cse7 (+ (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 2) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151)) (.cse5 (+ 2 .cse2))) (and (<= 0 (+ (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103 v_main_~y~0_BEFORE_CALL_184) (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69) (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (<= .cse0 .cse1) (<= .cse2 .cse3) (< .cse4 .cse5) (<= .cse6 .cse1) (<= 1 |c___VERIFIER_assert_#in~cond|) (< .cse3 .cse5) (<= .cse2 .cse4) (= (+ (* (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69) 2) (* aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151) aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 1) 0) (< (+ (* (* aux_div_v_main_~p~0_BEFORE_CALL_174_45 v_main_~x~0_BEFORE_CALL_204) 2) (* (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127 v_main_~y~0_BEFORE_CALL_184) 2)) v_main_~y~0_BEFORE_CALL_184) (< .cse1 (+ 2 .cse6)) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_49_103_127_151) (< v_main_~y~0_BEFORE_CALL_184 v_main_~x~0_BEFORE_CALL_204) (< .cse1 (+ 2 .cse0)) (<= .cse2 .cse7) (< .cse8 2) (not (= (+ (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95) (* v_main_~y~0_BEFORE_CALL_184 aux_div_v_main_~r~0_BEFORE_CALL_171_49)) 0)) (< .cse7 .cse5)))))) is different from false [2022-04-06 16:36:51,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:53,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:54,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:56,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:36:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:56,969 INFO L93 Difference]: Finished difference Result 255 states and 293 transitions. [2022-04-06 16:36:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:36:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 110 [2022-04-06 16:36:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:56,971 INFO L225 Difference]: With dead ends: 255 [2022-04-06 16:36:56,971 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 16:36:56,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=89, Invalid=421, Unknown=4, NotChecked=86, Total=600 [2022-04-06 16:36:56,972 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:56,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 265 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 429 Invalid, 5 Unknown, 56 Unchecked, 15.3s Time] [2022-04-06 16:36:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 16:36:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2022-04-06 16:36:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 155 states have (on average 1.096774193548387) internal successors, (170), 160 states have internal predecessors, (170), 60 states have call successors, (60), 36 states have call predecessors, (60), 35 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 16:36:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2022-04-06 16:36:57,018 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 110 [2022-04-06 16:36:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:57,018 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2022-04-06 16:36:57,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 16:36:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2022-04-06 16:36:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:36:57,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:57,019 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:57,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:57,231 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 [2022-04-06 16:36:57,231 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-04-06 16:36:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994619215] [2022-04-06 16:36:57,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-04-06 16:36:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73044206] [2022-04-06 16:36:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:57,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:57,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:57,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964703635] [2022-04-06 16:36:57,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:57,239 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) [2022-04-06 16:36:57,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:36:57,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:57,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:57,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 16:36:57,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-04-06 16:36:58,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:00,487 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 70 proven. 40 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 16:37:00,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73044206] [2022-04-06 16:37:00,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964703635] [2022-04-06 16:37:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964703635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:00,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-04-06 16:37:00,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994619215] [2022-04-06 16:37:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994619215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:00,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:37:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560557663] [2022-04-06 16:37:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:00,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:37:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:37:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:37:00,547 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:37:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:01,189 INFO L93 Difference]: Finished difference Result 277 states and 320 transitions. [2022-04-06 16:37:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:37:01,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-04-06 16:37:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:01,192 INFO L225 Difference]: With dead ends: 277 [2022-04-06 16:37:01,192 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 16:37:01,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:37:01,193 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:01,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 214 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:37:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 16:37:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-04-06 16:37:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 170 states have (on average 1.1) internal successors, (187), 175 states have internal predecessors, (187), 66 states have call successors, (66), 39 states have call predecessors, (66), 38 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 16:37:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 318 transitions. [2022-04-06 16:37:01,245 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 318 transitions. Word has length 110 [2022-04-06 16:37:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:01,245 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 318 transitions. [2022-04-06 16:37:01,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:37:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 318 transitions. [2022-04-06 16:37:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:37:01,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:01,246 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:01,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:01,459 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 [2022-04-06 16:37:01,459 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-04-06 16:37:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671141894] [2022-04-06 16:37:01,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-04-06 16:37:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073383746] [2022-04-06 16:37:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:01,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:01,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084892692] [2022-04-06 16:37:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:01,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:01,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:01,467 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) [2022-04-06 16:37:01,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:37:01,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:01,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 16:37:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 80 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-04-06 16:37:03,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 33 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-04-06 16:37:04,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073383746] [2022-04-06 16:37:04,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084892692] [2022-04-06 16:37:04,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084892692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:04,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:04,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-04-06 16:37:04,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671141894] [2022-04-06 16:37:04,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671141894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:04,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:04,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:37:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793254985] [2022-04-06 16:37:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:04,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:37:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:37:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:37:04,343 INFO L87 Difference]: Start difference. First operand 275 states and 318 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:37:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:05,358 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2022-04-06 16:37:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:37:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-04-06 16:37:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:05,360 INFO L225 Difference]: With dead ends: 312 [2022-04-06 16:37:05,360 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 16:37:05,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:37:05,361 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:05,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:37:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 16:37:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 268. [2022-04-06 16:37:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 167 states have (on average 1.089820359281437) internal successors, (182), 172 states have internal predecessors, (182), 61 states have call successors, (61), 40 states have call predecessors, (61), 39 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-04-06 16:37:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 303 transitions. [2022-04-06 16:37:05,417 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 303 transitions. Word has length 110 [2022-04-06 16:37:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:05,417 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 303 transitions. [2022-04-06 16:37:05,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 16:37:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 303 transitions. [2022-04-06 16:37:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:37:05,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:05,418 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:05,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:05,619 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 [2022-04-06 16:37:05,619 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-04-06 16:37:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:05,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923807917] [2022-04-06 16:37:05,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-04-06 16:37:05,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527099674] [2022-04-06 16:37:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:05,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:05,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:05,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184936586] [2022-04-06 16:37:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:37:05,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:05,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:05,628 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) [2022-04-06 16:37:05,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:37:05,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:37:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 16:37:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 67 proven. 40 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-04-06 16:37:06,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:06,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:06,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527099674] [2022-04-06 16:37:06,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:06,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184936586] [2022-04-06 16:37:06,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184936586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:37:06,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:37:06,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 16:37:06,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:06,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923807917] [2022-04-06 16:37:06,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923807917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:06,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:06,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:37:06,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235631187] [2022-04-06 16:37:06,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:06,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:37:06,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:37:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:37:06,644 INFO L87 Difference]: Start difference. First operand 268 states and 303 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:37:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:07,175 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2022-04-06 16:37:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:37:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 110 [2022-04-06 16:37:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:07,177 INFO L225 Difference]: With dead ends: 316 [2022-04-06 16:37:07,177 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 16:37:07,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:37:07,177 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:07,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 147 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:37:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 16:37:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 282. [2022-04-06 16:37:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.0909090909090908) internal successors, (192), 181 states have internal predecessors, (192), 64 states have call successors, (64), 42 states have call predecessors, (64), 41 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 16:37:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 319 transitions. [2022-04-06 16:37:07,238 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 319 transitions. Word has length 110 [2022-04-06 16:37:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:07,239 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 319 transitions. [2022-04-06 16:37:07,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:37:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 319 transitions. [2022-04-06 16:37:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:37:07,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:07,239 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:07,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:07,444 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 [2022-04-06 16:37:07,444 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 25 times [2022-04-06 16:37:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:07,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105481742] [2022-04-06 16:37:07,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:07,445 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 26 times [2022-04-06 16:37:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:07,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710671783] [2022-04-06 16:37:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:07,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:07,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:07,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428306189] [2022-04-06 16:37:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:37:07,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:07,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:07,453 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) [2022-04-06 16:37:07,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:37:07,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:37:07,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:07,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 16:37:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 31 proven. 79 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 16:37:08,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 16:37:09,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710671783] [2022-04-06 16:37:09,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428306189] [2022-04-06 16:37:09,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428306189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:09,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:09,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 16:37:09,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105481742] [2022-04-06 16:37:09,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105481742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:09,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:09,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:37:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23658342] [2022-04-06 16:37:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:09,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:37:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:37:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:37:09,047 INFO L87 Difference]: Start difference. First operand 282 states and 319 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:37:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:09,910 INFO L93 Difference]: Finished difference Result 306 states and 350 transitions. [2022-04-06 16:37:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:37:09,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-04-06 16:37:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:09,912 INFO L225 Difference]: With dead ends: 306 [2022-04-06 16:37:09,912 INFO L226 Difference]: Without dead ends: 304 [2022-04-06 16:37:09,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:37:09,913 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:09,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 271 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:37:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-04-06 16:37:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 272. [2022-04-06 16:37:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 170 states have (on average 1.0941176470588236) internal successors, (186), 175 states have internal predecessors, (186), 62 states have call successors, (62), 40 states have call predecessors, (62), 39 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:37:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 309 transitions. [2022-04-06 16:37:09,975 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 309 transitions. Word has length 110 [2022-04-06 16:37:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:09,975 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 309 transitions. [2022-04-06 16:37:09,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:37:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 309 transitions. [2022-04-06 16:37:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:37:09,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:09,976 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:09,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:10,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:37:10,190 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:10,190 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 27 times [2022-04-06 16:37:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:10,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431076107] [2022-04-06 16:37:10,191 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 28 times [2022-04-06 16:37:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:10,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525824322] [2022-04-06 16:37:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:10,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:10,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937676440] [2022-04-06 16:37:10,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:10,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:10,199 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:10,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:37:10,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:37:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 16:37:10,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-04-06 16:37:11,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:11,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525824322] [2022-04-06 16:37:11,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:11,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937676440] [2022-04-06 16:37:11,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937676440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:11,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:11,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 16:37:11,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:11,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431076107] [2022-04-06 16:37:11,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431076107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:11,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:11,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:37:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785548130] [2022-04-06 16:37:11,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:11,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:37:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:37:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:37:11,262 INFO L87 Difference]: Start difference. First operand 272 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:37:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:11,924 INFO L93 Difference]: Finished difference Result 322 states and 369 transitions. [2022-04-06 16:37:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:37:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-04-06 16:37:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:11,930 INFO L225 Difference]: With dead ends: 322 [2022-04-06 16:37:11,930 INFO L226 Difference]: Without dead ends: 320 [2022-04-06 16:37:11,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:37:11,935 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:11,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 246 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:37:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-04-06 16:37:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 288. [2022-04-06 16:37:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 180 states have (on average 1.0944444444444446) internal successors, (197), 186 states have internal predecessors, (197), 66 states have call successors, (66), 42 states have call predecessors, (66), 41 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 16:37:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 328 transitions. [2022-04-06 16:37:12,009 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 328 transitions. Word has length 110 [2022-04-06 16:37:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:12,010 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 328 transitions. [2022-04-06 16:37:12,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 16:37:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 328 transitions. [2022-04-06 16:37:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:37:12,010 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:12,011 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:12,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:12,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:37:12,216 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 29 times [2022-04-06 16:37:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237032136] [2022-04-06 16:37:12,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 30 times [2022-04-06 16:37:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100656898] [2022-04-06 16:37:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:12,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:12,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049644845] [2022-04-06 16:37:12,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:37:12,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:12,235 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:37:12,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:37:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:12,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:37:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-04-06 16:37:15,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:37:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100656898] [2022-04-06 16:37:22,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049644845] [2022-04-06 16:37:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049644845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:22,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:37:22,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237032136] [2022-04-06 16:37:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237032136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:22,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:37:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424090996] [2022-04-06 16:37:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:22,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:37:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:37:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=140, Unknown=3, NotChecked=0, Total=182 [2022-04-06 16:37:22,012 INFO L87 Difference]: Start difference. First operand 288 states and 328 transitions. Second operand has 11 states, 10 states have (on average 2.5) 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), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:37:24,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:25,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:31,716 WARN L232 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 47 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:37:33,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:35,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:37,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:39,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:41,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:43,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:46,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:48,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:50,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:37:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:50,711 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2022-04-06 16:37:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:37:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) 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), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-04-06 16:37:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:50,712 INFO L225 Difference]: With dead ends: 346 [2022-04-06 16:37:50,712 INFO L226 Difference]: Without dead ends: 344 [2022-04-06 16:37:50,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=3, NotChecked=0, Total=272 [2022-04-06 16:37:50,713 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 15 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:50,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 186 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 273 Invalid, 7 Unknown, 0 Unchecked, 22.8s Time] [2022-04-06 16:37:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-04-06 16:37:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 310. [2022-04-06 16:37:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 193 states have (on average 1.0932642487046633) internal successors, (211), 200 states have internal predecessors, (211), 72 states have call successors, (72), 45 states have call predecessors, (72), 44 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2022-04-06 16:37:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 354 transitions. [2022-04-06 16:37:50,787 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 354 transitions. Word has length 115 [2022-04-06 16:37:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:50,787 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 354 transitions. [2022-04-06 16:37:50,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) 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), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:37:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 354 transitions. [2022-04-06 16:37:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:37:50,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:50,788 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:51,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:37:51,003 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 31 times [2022-04-06 16:37:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:51,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1717182113] [2022-04-06 16:37:51,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 32 times [2022-04-06 16:37:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:51,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745550834] [2022-04-06 16:37:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:51,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:51,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879543319] [2022-04-06 16:37:51,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:37:51,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:51,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:51,010 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:51,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:37:51,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:37:51,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:37:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 16:37:51,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:37:52,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745550834] [2022-04-06 16:37:52,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879543319] [2022-04-06 16:37:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879543319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:52,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 16:37:52,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1717182113] [2022-04-06 16:37:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1717182113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:52,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:37:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685743420] [2022-04-06 16:37:52,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:52,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:37:52,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:37:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:37:52,030 INFO L87 Difference]: Start difference. First operand 310 states and 354 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:37:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:53,183 INFO L93 Difference]: Finished difference Result 336 states and 385 transitions. [2022-04-06 16:37:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:37:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 16:37:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:53,185 INFO L225 Difference]: With dead ends: 336 [2022-04-06 16:37:53,185 INFO L226 Difference]: Without dead ends: 334 [2022-04-06 16:37:53,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:37:53,185 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:53,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 241 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 16:37:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-04-06 16:37:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-04-06 16:37:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 208 states have (on average 1.0961538461538463) internal successors, (228), 215 states have internal predecessors, (228), 78 states have call successors, (78), 48 states have call predecessors, (78), 47 states have return successors, (77), 70 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:37:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 383 transitions. [2022-04-06 16:37:53,269 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 383 transitions. Word has length 115 [2022-04-06 16:37:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:53,270 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 383 transitions. [2022-04-06 16:37:53,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:37:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 383 transitions. [2022-04-06 16:37:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:37:53,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:53,270 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:53,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:53,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:37:53,481 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 33 times [2022-04-06 16:37:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:53,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414661120] [2022-04-06 16:37:53,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 34 times [2022-04-06 16:37:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:53,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267894831] [2022-04-06 16:37:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:53,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092766613] [2022-04-06 16:37:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:53,500 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:53,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:37:53,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 16:37:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 16:37:54,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:37:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267894831] [2022-04-06 16:37:54,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:54,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092766613] [2022-04-06 16:37:54,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092766613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:54,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:54,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-04-06 16:37:54,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:54,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414661120] [2022-04-06 16:37:54,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414661120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:54,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:54,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:37:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941931341] [2022-04-06 16:37:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:54,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:37:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:37:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:37:54,539 INFO L87 Difference]: Start difference. First operand 334 states and 383 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:37:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:55,295 INFO L93 Difference]: Finished difference Result 380 states and 433 transitions. [2022-04-06 16:37:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:37:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 16:37:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:55,296 INFO L225 Difference]: With dead ends: 380 [2022-04-06 16:37:55,296 INFO L226 Difference]: Without dead ends: 378 [2022-04-06 16:37:55,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:37:55,297 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:55,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 196 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:37:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-04-06 16:37:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 356. [2022-04-06 16:37:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 223 states have (on average 1.094170403587444) internal successors, (244), 230 states have internal predecessors, (244), 81 states have call successors, (81), 52 states have call predecessors, (81), 51 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-04-06 16:37:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 405 transitions. [2022-04-06 16:37:55,393 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 405 transitions. Word has length 115 [2022-04-06 16:37:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:55,393 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 405 transitions. [2022-04-06 16:37:55,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 16:37:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 405 transitions. [2022-04-06 16:37:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:37:55,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:55,394 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:55,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:55,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:37:55,607 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 35 times [2022-04-06 16:37:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472398495] [2022-04-06 16:37:55,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 36 times [2022-04-06 16:37:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161736931] [2022-04-06 16:37:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:55,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:55,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:55,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533327871] [2022-04-06 16:37:55,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:37:55,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:55,622 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:55,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:37:55,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:37:55,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:37:55,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 99 proven. 39 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-06 16:37:55,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:37:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:58,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161736931] [2022-04-06 16:37:58,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:58,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533327871] [2022-04-06 16:37:58,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533327871] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:58,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:58,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:37:58,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:58,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472398495] [2022-04-06 16:37:58,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472398495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:58,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:58,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:37:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294185513] [2022-04-06 16:37:58,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:58,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:37:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:37:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2022-04-06 16:37:58,198 INFO L87 Difference]: Start difference. First operand 356 states and 405 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:37:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:58,602 INFO L93 Difference]: Finished difference Result 372 states and 424 transitions. [2022-04-06 16:37:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:37:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 115 [2022-04-06 16:37:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:58,604 INFO L225 Difference]: With dead ends: 372 [2022-04-06 16:37:58,604 INFO L226 Difference]: Without dead ends: 370 [2022-04-06 16:37:58,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2022-04-06 16:37:58,604 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:58,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 188 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-04-06 16:37:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-04-06 16:37:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 364. [2022-04-06 16:37:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 227 states have (on average 1.092511013215859) internal successors, (248), 235 states have internal predecessors, (248), 84 states have call successors, (84), 53 states have call predecessors, (84), 52 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:37:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 415 transitions. [2022-04-06 16:37:58,709 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 415 transitions. Word has length 115 [2022-04-06 16:37:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:58,709 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 415 transitions. [2022-04-06 16:37:58,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:37:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 415 transitions. [2022-04-06 16:37:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:37:58,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:58,710 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:58,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:58,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:58,917 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 37 times [2022-04-06 16:37:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:58,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [781097138] [2022-04-06 16:37:58,918 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 38 times [2022-04-06 16:37:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:58,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406817281] [2022-04-06 16:37:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:58,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:58,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469264317] [2022-04-06 16:37:58,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:37:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:58,924 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:58,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:37:58,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:37:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:37:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 112 proven. 67 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 16:38:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:38:00,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406817281] [2022-04-06 16:38:00,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469264317] [2022-04-06 16:38:00,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469264317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:00,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:00,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 16:38:00,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:00,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [781097138] [2022-04-06 16:38:00,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [781097138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:00,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:00,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:38:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944387709] [2022-04-06 16:38:00,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:00,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:38:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:38:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:38:00,413 INFO L87 Difference]: Start difference. First operand 364 states and 415 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:38:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:02,514 INFO L93 Difference]: Finished difference Result 402 states and 459 transitions. [2022-04-06 16:38:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:38:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-04-06 16:38:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:02,516 INFO L225 Difference]: With dead ends: 402 [2022-04-06 16:38:02,516 INFO L226 Difference]: Without dead ends: 400 [2022-04-06 16:38:02,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:38:02,517 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:02,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 222 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 16:38:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-04-06 16:38:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 376. [2022-04-06 16:38:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 235 states have (on average 1.0936170212765957) internal successors, (257), 242 states have internal predecessors, (257), 86 states have call successors, (86), 55 states have call predecessors, (86), 54 states have return successors, (85), 78 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-06 16:38:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 428 transitions. [2022-04-06 16:38:02,633 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 428 transitions. Word has length 115 [2022-04-06 16:38:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:02,633 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 428 transitions. [2022-04-06 16:38:02,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:38:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 428 transitions. [2022-04-06 16:38:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 16:38:02,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:38:02,634 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:38:02,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 16:38:02,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 16:38:02,847 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:38:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:38:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 39 times [2022-04-06 16:38:02,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855605805] [2022-04-06 16:38:02,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:38:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 40 times [2022-04-06 16:38:02,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:38:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992229540] [2022-04-06 16:38:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:38:02,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:38:02,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:38:02,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112918149] [2022-04-06 16:38:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:38:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:38:02,854 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:38:02,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:38:02,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:38:02,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:38:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 16:38:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 57 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:38:04,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 16:38:05,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992229540] [2022-04-06 16:38:05,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112918149] [2022-04-06 16:38:05,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112918149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:05,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:05,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-04-06 16:38:05,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:05,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855605805] [2022-04-06 16:38:05,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855605805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:05,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:05,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:38:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074209384] [2022-04-06 16:38:05,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:05,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:38:05,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:38:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:38:05,023 INFO L87 Difference]: Start difference. First operand 376 states and 428 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:38:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:06,769 INFO L93 Difference]: Finished difference Result 406 states and 462 transitions. [2022-04-06 16:38:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:38:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-04-06 16:38:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:06,771 INFO L225 Difference]: With dead ends: 406 [2022-04-06 16:38:06,771 INFO L226 Difference]: Without dead ends: 404 [2022-04-06 16:38:06,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:38:06,772 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:06,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 283 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 16:38:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-04-06 16:38:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 364. [2022-04-06 16:38:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 227 states have (on average 1.092511013215859) internal successors, (248), 235 states have internal predecessors, (248), 84 states have call successors, (84), 53 states have call predecessors, (84), 52 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:38:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 415 transitions. [2022-04-06 16:38:06,877 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 415 transitions. Word has length 115 [2022-04-06 16:38:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:06,878 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 415 transitions. [2022-04-06 16:38:06,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:38:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 415 transitions. [2022-04-06 16:38:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:38:06,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:38:06,879 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:38:06,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 16:38:07,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:07,079 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:38:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:38:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 41 times [2022-04-06 16:38:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459287502] [2022-04-06 16:38:07,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:38:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 42 times [2022-04-06 16:38:07,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:38:07,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21998146] [2022-04-06 16:38:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:38:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:38:07,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:38:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103561259] [2022-04-06 16:38:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:38:07,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:38:07,091 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:38:07,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:38:07,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:38:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:38:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 16:38:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 138 proven. 35 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-04-06 16:38:08,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 16:38:08,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21998146] [2022-04-06 16:38:08,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103561259] [2022-04-06 16:38:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103561259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:08,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 16:38:08,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459287502] [2022-04-06 16:38:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459287502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:08,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:38:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534608575] [2022-04-06 16:38:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:08,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:38:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:38:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:38:08,621 INFO L87 Difference]: Start difference. First operand 364 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:38:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:10,117 INFO L93 Difference]: Finished difference Result 456 states and 527 transitions. [2022-04-06 16:38:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:38:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 128 [2022-04-06 16:38:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:10,118 INFO L225 Difference]: With dead ends: 456 [2022-04-06 16:38:10,118 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 16:38:10,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:38:10,119 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:10,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 165 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:38:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 16:38:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2022-04-06 16:38:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 146 states have internal predecessors, (154), 51 states have call successors, (51), 34 states have call predecessors, (51), 33 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2022-04-06 16:38:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 255 transitions. [2022-04-06 16:38:10,197 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 255 transitions. Word has length 128 [2022-04-06 16:38:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:10,197 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 255 transitions. [2022-04-06 16:38:10,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:38:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 255 transitions. [2022-04-06 16:38:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:38:10,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:38:10,198 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:38:10,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:38:10,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:10,405 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:38:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:38:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 43 times [2022-04-06 16:38:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762411378] [2022-04-06 16:38:10,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:38:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 44 times [2022-04-06 16:38:10,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:38:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891793611] [2022-04-06 16:38:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:38:10,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:38:10,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:38:10,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639219289] [2022-04-06 16:38:10,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:38:10,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:10,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:38:10,412 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:38:10,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:38:10,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:38:10,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:38:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:38:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 90 proven. 101 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:38:34,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-04-06 16:38:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891793611] [2022-04-06 16:38:37,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639219289] [2022-04-06 16:38:37,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639219289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:37,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:37,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-04-06 16:38:37,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762411378] [2022-04-06 16:38:37,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762411378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:37,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:37,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:38:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024860182] [2022-04-06 16:38:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:37,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:38:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:38:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=359, Unknown=2, NotChecked=0, Total=462 [2022-04-06 16:38:37,528 INFO L87 Difference]: Start difference. First operand 227 states and 255 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:38:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:42,211 INFO L93 Difference]: Finished difference Result 267 states and 308 transitions. [2022-04-06 16:38:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:38:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-04-06 16:38:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:42,212 INFO L225 Difference]: With dead ends: 267 [2022-04-06 16:38:42,212 INFO L226 Difference]: Without dead ends: 265 [2022-04-06 16:38:42,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=115, Invalid=435, Unknown=2, NotChecked=0, Total=552 [2022-04-06 16:38:42,213 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 12 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:42,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 254 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 592 Invalid, 0 Unknown, 11 Unchecked, 4.2s Time] [2022-04-06 16:38:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-06 16:38:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 246. [2022-04-06 16:38:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 157 states have internal predecessors, (166), 59 states have call successors, (59), 35 states have call predecessors, (59), 34 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 16:38:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 283 transitions. [2022-04-06 16:38:42,310 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 283 transitions. Word has length 128 [2022-04-06 16:38:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:42,311 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 283 transitions. [2022-04-06 16:38:42,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:38:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 283 transitions. [2022-04-06 16:38:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:38:42,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:38:42,311 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:38:42,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:38:42,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 16:38:42,517 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:38:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:38:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 45 times [2022-04-06 16:38:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:42,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534597205] [2022-04-06 16:38:42,518 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:38:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 46 times [2022-04-06 16:38:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:38:42,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609616903] [2022-04-06 16:38:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:38:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:38:42,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:38:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021735037] [2022-04-06 16:38:42,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:38:42,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:38:42,524 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:38:42,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:38:42,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:38:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:38:42,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 16:38:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 140 proven. 156 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 16:38:43,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 16:38:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609616903] [2022-04-06 16:38:44,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021735037] [2022-04-06 16:38:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021735037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:44,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:44,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-04-06 16:38:44,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:44,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534597205] [2022-04-06 16:38:44,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534597205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:44,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:44,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:38:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616561974] [2022-04-06 16:38:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:44,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:38:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:38:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:38:44,345 INFO L87 Difference]: Start difference. First operand 246 states and 283 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:38:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:45,723 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2022-04-06 16:38:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:38:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-04-06 16:38:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:45,725 INFO L225 Difference]: With dead ends: 286 [2022-04-06 16:38:45,725 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 16:38:45,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:38:45,726 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:45,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 197 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 16:38:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 16:38:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 271. [2022-04-06 16:38:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 174 states have internal predecessors, (183), 64 states have call successors, (64), 39 states have call predecessors, (64), 38 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 16:38:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 310 transitions. [2022-04-06 16:38:45,844 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 310 transitions. Word has length 128 [2022-04-06 16:38:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:45,844 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 310 transitions. [2022-04-06 16:38:45,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:38:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 310 transitions. [2022-04-06 16:38:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:38:45,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:38:45,845 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:38:45,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:38:46,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:38:46,049 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:38:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:38:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 47 times [2022-04-06 16:38:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:46,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519258511] [2022-04-06 16:38:46,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:38:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 48 times [2022-04-06 16:38:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:38:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853890526] [2022-04-06 16:38:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:38:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:38:46,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:38:46,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130447155] [2022-04-06 16:38:46,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:38:46,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:38:46,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:38:46,055 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:38:46,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 16:38:46,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:38:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:38:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 16:38:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:38:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-04-06 16:38:46,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 16:38:46,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:38:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853890526] [2022-04-06 16:38:46,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:38:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130447155] [2022-04-06 16:38:46,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130447155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:38:46,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:38:46,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 16:38:46,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:38:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519258511] [2022-04-06 16:38:46,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519258511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:38:46,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:38:46,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:38:46,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060137735] [2022-04-06 16:38:46,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:38:46,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:38:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:38:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:38:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:38:46,563 INFO L87 Difference]: Start difference. First operand 271 states and 310 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:38:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:38:47,144 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-04-06 16:38:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:38:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-04-06 16:38:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:38:47,152 INFO L225 Difference]: With dead ends: 271 [2022-04-06 16:38:47,152 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 16:38:47,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:38:47,153 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:38:47,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-04-06 16:38:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 16:38:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 16:38:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 16:38:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 16:38:47,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-04-06 16:38:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:38:47,155 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 16:38:47,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:38:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 16:38:47,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 16:38:47,157 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:38:47,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 16:38:47,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:38:47,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 16:41:05,101 WARN L232 SmtUtils]: Spent 2.07m on a formula simplification. DAG size of input: 644 DAG size of output: 27 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 16:41:35,082 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-04-06 16:41:35,083 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:256) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeIcfgHoareAnnotation(BasicCegarLoop.java:1164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:856) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:351) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 39 more [2022-04-06 16:41:35,086 INFO L158 Benchmark]: Toolchain (without parser) took 719622.81ms. Allocated memory was 215.0MB in the beginning and 352.3MB in the end (delta: 137.4MB). Free memory was 165.9MB in the beginning and 137.9MB in the end (delta: 28.0MB). Peak memory consumption was 191.4MB. Max. memory is 8.0GB. [2022-04-06 16:41:35,086 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory was 182.1MB in the beginning and 182.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:41:35,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.25ms. Allocated memory is still 215.0MB. Free memory was 165.7MB in the beginning and 191.6MB in the end (delta: -25.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 16:41:35,086 INFO L158 Benchmark]: Boogie Preprocessor took 31.32ms. Allocated memory is still 215.0MB. Free memory was 191.6MB in the beginning and 190.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 16:41:35,086 INFO L158 Benchmark]: RCFGBuilder took 195.79ms. Allocated memory is still 215.0MB. Free memory was 190.0MB in the beginning and 179.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 16:41:35,086 INFO L158 Benchmark]: TraceAbstraction took 719176.94ms. Allocated memory was 215.0MB in the beginning and 352.3MB in the end (delta: 137.4MB). Free memory was 178.5MB in the beginning and 137.9MB in the end (delta: 40.5MB). Peak memory consumption was 203.6MB. Max. memory is 8.0GB. [2022-04-06 16:41:35,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2022-04-06 16:41:35,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory was 182.1MB in the beginning and 182.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.25ms. Allocated memory is still 215.0MB. Free memory was 165.7MB in the beginning and 191.6MB in the end (delta: -25.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.32ms. Allocated memory is still 215.0MB. Free memory was 191.6MB in the beginning and 190.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 195.79ms. Allocated memory is still 215.0MB. Free memory was 190.0MB in the beginning and 179.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 719176.94ms. Allocated memory was 215.0MB in the beginning and 352.3MB in the end (delta: 137.4MB). Free memory was 178.5MB in the beginning and 137.9MB in the end (delta: 40.5MB). Peak memory consumption was 203.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...