/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:55:16,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:55:16,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:55:16,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:55:16,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 14:55:16,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 14:55:16,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 14:55:16,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 14:55:16,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 14:55:16,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 14:55:16,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 14:55:16,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 14:55:16,853 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 14:55:16,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 14:55:16,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 14:55:16,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 14:55:16,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 14:55:16,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 14:55:16,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:55:16,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:55:16,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:55:16,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:55:16,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:55:16,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:55:16,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:55:16,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:55:16,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:55:16,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:55:16,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:55:16,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:55:16,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:55:16,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:55:16,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:55:16,879 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:55:17,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:55:17,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:55:17,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:55:17,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:55:17,077 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:55:17,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2022-03-20 14:55:17,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68753748/5efa655be54c404188345cc2f002a698/FLAG675a5bae9 [2022-03-20 14:55:17,445 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:55:17,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2022-03-20 14:55:17,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68753748/5efa655be54c404188345cc2f002a698/FLAG675a5bae9 [2022-03-20 14:55:17,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68753748/5efa655be54c404188345cc2f002a698 [2022-03-20 14:55:17,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:55:17,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:55:17,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:55:17,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:55:17,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:55:17,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:55:17" (1/1) ... [2022-03-20 14:55:17,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a95ebfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:17, skipping insertion in model container [2022-03-20 14:55:17,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:55:17" (1/1) ... [2022-03-20 14:55:17,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:55:17,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:55:18,021 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_valuebound100.c[489,502] [2022-03-20 14:55:18,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:55:18,037 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:55:18,044 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_valuebound100.c[489,502] [2022-03-20 14:55:18,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:55:18,063 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:55:18,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18 WrapperNode [2022-03-20 14:55:18,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:55:18,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:55:18,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:55:18,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:55:18,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:55:18,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:55:18,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:55:18,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:55:18,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (1/1) ... [2022-03-20 14:55:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:55:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:18,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 14:55:18,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 14:55:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:55:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:55:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:55:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:55:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:55:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:55:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:55:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:55:18,205 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:55:18,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:55:18,285 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:55:18,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:55:18,289 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:55:18,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:55:18 BoogieIcfgContainer [2022-03-20 14:55:18,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:55:18,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:55:18,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:55:18,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:55:18,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:55:17" (1/3) ... [2022-03-20 14:55:18,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a650159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:55:18, skipping insertion in model container [2022-03-20 14:55:18,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:55:18" (2/3) ... [2022-03-20 14:55:18,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a650159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:55:18, skipping insertion in model container [2022-03-20 14:55:18,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:55:18" (3/3) ... [2022-03-20 14:55:18,298 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.c [2022-03-20 14:55:18,301 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:55:18,302 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:55:18,332 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:55:18,336 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 14:55:18,337 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:55:18,345 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) [2022-03-20 14:55:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:55:18,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:18,351 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] [2022-03-20 14:55:18,351 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-20 14:55:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:18,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856652352] [2022-03-20 14:55:18,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-20 14:55:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:18,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488516222] [2022-03-20 14:55:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:55:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:55:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 14:55:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 14:55:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 14:55:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:55:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488516222] [2022-03-20 14:55:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488516222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:18,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:18,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:55:18,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856652352] [2022-03-20 14:55:18,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856652352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:18,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:18,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:55:18,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216443106] [2022-03-20 14:55:18,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:18,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:55:18,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:55:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:55:18,638 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) [2022-03-20 14:55:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:18,733 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-20 14:55:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:55:18,735 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 [2022-03-20 14:55:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:18,750 INFO L225 Difference]: With dead ends: 67 [2022-03-20 14:55:18,750 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 14:55:18,753 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 [2022-03-20 14:55:18,757 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 [2022-03-20 14:55:18,758 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] [2022-03-20 14:55:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 14:55:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 14:55:18,788 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) [2022-03-20 14:55:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 14:55:18,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-20 14:55:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:18,790 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 14:55:18,791 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) [2022-03-20 14:55:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 14:55:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:55:18,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:18,792 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] [2022-03-20 14:55:18,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:55:18,793 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-20 14:55:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:18,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483395377] [2022-03-20 14:55:18,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-20 14:55:18,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:18,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951460086] [2022-03-20 14:55:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:18,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:18,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896162119] [2022-03-20 14:55:18,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:18,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:18,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:18,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:18,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:55:18,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:55:18,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:18,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951460086] [2022-03-20 14:55:18,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896162119] [2022-03-20 14:55:18,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896162119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:18,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:18,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:18,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483395377] [2022-03-20 14:55:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483395377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:19,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640403830] [2022-03-20 14:55:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:19,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:19,006 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) [2022-03-20 14:55:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:19,059 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-20 14:55:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:19,060 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 [2022-03-20 14:55:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:19,063 INFO L225 Difference]: With dead ends: 48 [2022-03-20 14:55:19,063 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 14:55:19,064 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 [2022-03-20 14:55:19,064 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:19,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:19,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 14:55:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 14:55:19,074 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) [2022-03-20 14:55:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-20 14:55:19,076 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-20 14:55:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:19,079 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-20 14:55:19,079 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) [2022-03-20 14:55:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-20 14:55:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 14:55:19,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:19,083 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] [2022-03-20 14:55:19,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:19,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:19,289 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-20 14:55:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:19,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028150894] [2022-03-20 14:55:19,290 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-20 14:55:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:19,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672882999] [2022-03-20 14:55:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:19,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894311775] [2022-03-20 14:55:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:19,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:19,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:55:19,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:19,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:19,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:55:19,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672882999] [2022-03-20 14:55:19,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894311775] [2022-03-20 14:55:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894311775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:19,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:19,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:19,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:19,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028150894] [2022-03-20 14:55:19,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028150894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:19,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:19,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114487571] [2022-03-20 14:55:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:19,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:19,431 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) [2022-03-20 14:55:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:19,477 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-20 14:55:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:19,477 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 [2022-03-20 14:55:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:19,478 INFO L225 Difference]: With dead ends: 52 [2022-03-20 14:55:19,479 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 14:55:19,479 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 [2022-03-20 14:55:19,480 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:19,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 14:55:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 14:55:19,488 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) [2022-03-20 14:55:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-20 14:55:19,489 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-20 14:55:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:19,490 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-20 14:55:19,490 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) [2022-03-20 14:55:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-20 14:55:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 14:55:19,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:19,491 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] [2022-03-20 14:55:19,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:19,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 14:55:19,709 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-20 14:55:19,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:19,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [254226953] [2022-03-20 14:55:19,710 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-20 14:55:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:19,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119146181] [2022-03-20 14:55:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:19,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:19,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:19,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119798246] [2022-03-20 14:55:19,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:19,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:19,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:19,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:55:19,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:19,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:55:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:55:19,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119146181] [2022-03-20 14:55:19,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119798246] [2022-03-20 14:55:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119798246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:19,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:19,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:19,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [254226953] [2022-03-20 14:55:19,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [254226953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:19,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:19,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326010371] [2022-03-20 14:55:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:19,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:19,884 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) [2022-03-20 14:55:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:19,929 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-20 14:55:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:19,930 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 [2022-03-20 14:55:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:19,932 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:55:19,932 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 14:55:19,932 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 [2022-03-20 14:55:19,933 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:19,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 14:55:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 14:55:19,943 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) [2022-03-20 14:55:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-20 14:55:19,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-20 14:55:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:19,945 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-20 14:55:19,945 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) [2022-03-20 14:55:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-20 14:55:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 14:55:19,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:19,946 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] [2022-03-20 14:55:19,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:20,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:20,156 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-20 14:55:20,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:20,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472786] [2022-03-20 14:55:20,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-20 14:55:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:20,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681825156] [2022-03-20 14:55:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:20,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956711381] [2022-03-20 14:55:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:20,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:20,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:20,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:20,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:55:20,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:55:20,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 14:55:20,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681825156] [2022-03-20 14:55:20,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956711381] [2022-03-20 14:55:20,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956711381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:20,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:20,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:20,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:20,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472786] [2022-03-20 14:55:20,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:20,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:20,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:20,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573136980] [2022-03-20 14:55:20,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:20,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:20,265 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) [2022-03-20 14:55:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:20,289 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-20 14:55:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:20,289 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 [2022-03-20 14:55:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:20,290 INFO L225 Difference]: With dead ends: 76 [2022-03-20 14:55:20,290 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 14:55:20,290 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 [2022-03-20 14:55:20,291 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:20,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 14:55:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 14:55:20,311 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) [2022-03-20 14:55:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-20 14:55:20,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-20 14:55:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:20,313 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-20 14:55:20,313 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) [2022-03-20 14:55:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-20 14:55:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 14:55:20,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:20,314 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] [2022-03-20 14:55:20,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:20,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:20,514 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-20 14:55:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:20,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1512663924] [2022-03-20 14:55:20,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-20 14:55:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916335549] [2022-03-20 14:55:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:20,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:20,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534549079] [2022-03-20 14:55:20,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:20,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:20,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:20,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:55:20,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:55:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 14:55:20,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:55:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916335549] [2022-03-20 14:55:20,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534549079] [2022-03-20 14:55:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534549079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:20,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:20,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:20,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1512663924] [2022-03-20 14:55:20,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1512663924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:20,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:20,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117950402] [2022-03-20 14:55:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:20,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:55:20,731 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) [2022-03-20 14:55:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:20,776 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-20 14:55:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:20,776 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 [2022-03-20 14:55:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:20,778 INFO L225 Difference]: With dead ends: 84 [2022-03-20 14:55:20,778 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 14:55:20,778 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 [2022-03-20 14:55:20,779 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:20,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 14:55:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-20 14:55:20,787 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) [2022-03-20 14:55:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-20 14:55:20,788 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-20 14:55:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:20,788 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-20 14:55:20,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:55:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-20 14:55:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 14:55:20,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:20,789 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] [2022-03-20 14:55:20,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:20,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:20,996 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-20 14:55:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891548520] [2022-03-20 14:55:20,997 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-20 14:55:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:20,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696024258] [2022-03-20 14:55:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:20,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:21,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998728883] [2022-03-20 14:55:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:21,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:21,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:21,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:55:21,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 14:55:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:55:21,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:55:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696024258] [2022-03-20 14:55:21,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998728883] [2022-03-20 14:55:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998728883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:21,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:21,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 14:55:21,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891548520] [2022-03-20 14:55:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891548520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:21,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:55:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261480286] [2022-03-20 14:55:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:21,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:55:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:55:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:55:21,344 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) [2022-03-20 14:55:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:21,430 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-20 14:55:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:55:21,430 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 [2022-03-20 14:55:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:21,431 INFO L225 Difference]: With dead ends: 88 [2022-03-20 14:55:21,431 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 14:55:21,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:55:21,432 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:21,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 14:55:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-20 14:55:21,450 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) [2022-03-20 14:55:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-20 14:55:21,451 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-20 14:55:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:21,451 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-20 14:55:21,451 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) [2022-03-20 14:55:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-20 14:55:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 14:55:21,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:21,452 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] [2022-03-20 14:55:21,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:21,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:21,665 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-20 14:55:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920323641] [2022-03-20 14:55:21,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-20 14:55:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562376277] [2022-03-20 14:55:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:21,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280319806] [2022-03-20 14:55:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:21,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:21,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:21,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:55:21,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:21,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:55:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:55:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:55:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562376277] [2022-03-20 14:55:21,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280319806] [2022-03-20 14:55:21,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280319806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:21,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:21,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:55:21,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920323641] [2022-03-20 14:55:21,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920323641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:21,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:21,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:55:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448089856] [2022-03-20 14:55:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:21,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:55:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:55:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:55:21,992 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) [2022-03-20 14:55:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:22,054 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-20 14:55:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:55:22,055 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 [2022-03-20 14:55:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:22,056 INFO L225 Difference]: With dead ends: 118 [2022-03-20 14:55:22,056 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 14:55:22,056 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 [2022-03-20 14:55:22,057 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:22,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 216 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 14:55:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-20 14:55:22,071 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) [2022-03-20 14:55:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-20 14:55:22,073 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-20 14:55:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:22,073 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-20 14:55:22,073 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) [2022-03-20 14:55:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-20 14:55:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 14:55:22,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:22,075 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] [2022-03-20 14:55:22,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:22,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:22,295 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-20 14:55:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:22,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856686656] [2022-03-20 14:55:22,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-20 14:55:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658121000] [2022-03-20 14:55:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:22,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:22,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88221670] [2022-03-20 14:55:22,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:22,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:22,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:22,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:22,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:55:22,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 14:55:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:55:22,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:55:22,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658121000] [2022-03-20 14:55:22,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88221670] [2022-03-20 14:55:22,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88221670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:22,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:22,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:55:22,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856686656] [2022-03-20 14:55:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856686656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:22,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:22,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:55:22,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697919507] [2022-03-20 14:55:22,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:22,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:55:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:55:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:55:22,608 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) [2022-03-20 14:55:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:22,688 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-20 14:55:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:55:22,688 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 [2022-03-20 14:55:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:22,689 INFO L225 Difference]: With dead ends: 137 [2022-03-20 14:55:22,690 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 14:55:22,690 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 [2022-03-20 14:55:22,690 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:22,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 14:55:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 14:55:22,704 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) [2022-03-20 14:55:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-20 14:55:22,704 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-20 14:55:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:22,705 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-20 14:55:22,705 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) [2022-03-20 14:55:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-20 14:55:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 14:55:22,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:22,706 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] [2022-03-20 14:55:22,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:22,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 14:55:22,916 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-20 14:55:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:22,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820968775] [2022-03-20 14:55:22,918 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-20 14:55:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:22,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979805182] [2022-03-20 14:55:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:22,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:22,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:22,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901533704] [2022-03-20 14:55:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:22,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:22,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:22,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 14:55:22,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:55:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:55:23,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 14:55:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979805182] [2022-03-20 14:55:23,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901533704] [2022-03-20 14:55:23,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901533704] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:55:23,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:55:23,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 14:55:23,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820968775] [2022-03-20 14:55:23,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820968775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:23,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:23,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:55:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956850979] [2022-03-20 14:55:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:23,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:55:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:55:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:55:23,251 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) [2022-03-20 14:55:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:23,298 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-20 14:55:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:55:23,299 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 [2022-03-20 14:55:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:23,301 INFO L225 Difference]: With dead ends: 137 [2022-03-20 14:55:23,301 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 14:55:23,302 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 [2022-03-20 14:55:23,302 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:23,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:55:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 14:55:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 14:55:23,322 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) [2022-03-20 14:55:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-20 14:55:23,323 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-20 14:55:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:23,325 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-20 14:55:23,325 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) [2022-03-20 14:55:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-20 14:55:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 14:55:23,329 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:23,329 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] [2022-03-20 14:55:23,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:23,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 14:55:23,547 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-20 14:55:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1633417924] [2022-03-20 14:55:23,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-20 14:55:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632144765] [2022-03-20 14:55:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:23,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:23,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209402375] [2022-03-20 14:55:23,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:23,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:23,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 14:55:23,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:55:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 14:55:23,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 14:55:24,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632144765] [2022-03-20 14:55:24,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209402375] [2022-03-20 14:55:24,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209402375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:24,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:24,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-20 14:55:24,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:24,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1633417924] [2022-03-20 14:55:24,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1633417924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:24,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:24,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:55:24,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992102956] [2022-03-20 14:55:24,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:24,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:55:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:55:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:55:24,225 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) [2022-03-20 14:55:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:24,460 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-03-20 14:55:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:55:24,461 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 [2022-03-20 14:55:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:24,462 INFO L225 Difference]: With dead ends: 166 [2022-03-20 14:55:24,462 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 14:55:24,462 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 [2022-03-20 14:55:24,463 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:24,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 244 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 14:55:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-03-20 14:55:24,491 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) [2022-03-20 14:55:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-03-20 14:55:24,492 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-03-20 14:55:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:24,492 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-03-20 14:55:24,493 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) [2022-03-20 14:55:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-03-20 14:55:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 14:55:24,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:24,493 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] [2022-03-20 14:55:24,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:24,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 14:55:24,713 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-20 14:55:24,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:24,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254943946] [2022-03-20 14:55:24,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-20 14:55:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139233314] [2022-03-20 14:55:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:24,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:24,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052444415] [2022-03-20 14:55:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:24,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:24,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:24,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 14:55:24,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 14:55:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 14:55:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:25,394 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:55:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139233314] [2022-03-20 14:55:25,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052444415] [2022-03-20 14:55:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052444415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:55:25,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:55:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 14:55:25,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254943946] [2022-03-20 14:55:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254943946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:25,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:55:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661843166] [2022-03-20 14:55:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:25,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:55:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:55:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:55:25,999 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) [2022-03-20 14:55:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:26,321 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-03-20 14:55:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:55:26,321 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 [2022-03-20 14:55:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:26,323 INFO L225 Difference]: With dead ends: 184 [2022-03-20 14:55:26,323 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 14:55:26,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:55:26,324 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:26,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 293 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:55:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 14:55:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-03-20 14:55:26,347 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) [2022-03-20 14:55:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2022-03-20 14:55:26,348 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 74 [2022-03-20 14:55:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:26,348 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2022-03-20 14:55:26,348 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) [2022-03-20 14:55:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2022-03-20 14:55:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 14:55:26,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:26,349 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] [2022-03-20 14:55:26,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:26,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 14:55:26,563 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-20 14:55:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:26,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630931392] [2022-03-20 14:55:26,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-20 14:55:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328666604] [2022-03-20 14:55:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:26,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:26,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136742419] [2022-03-20 14:55:26,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:26,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:26,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:26,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:26,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 14:55:26,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:26,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:55:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 14:55:26,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-20 14:55:26,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:26,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328666604] [2022-03-20 14:55:26,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:26,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136742419] [2022-03-20 14:55:26,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136742419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:26,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:26,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-20 14:55:26,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630931392] [2022-03-20 14:55:26,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630931392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:26,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:26,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:55:26,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724580008] [2022-03-20 14:55:26,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:26,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:55:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:55:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:55:26,949 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) [2022-03-20 14:55:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:27,132 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2022-03-20 14:55:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:55:27,133 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 [2022-03-20 14:55:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:27,134 INFO L225 Difference]: With dead ends: 182 [2022-03-20 14:55:27,134 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 14:55:27,134 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 [2022-03-20 14:55:27,135 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:27,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 186 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 14:55:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-03-20 14:55:27,148 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) [2022-03-20 14:55:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-03-20 14:55:27,149 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 79 [2022-03-20 14:55:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:27,149 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-03-20 14:55:27,149 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) [2022-03-20 14:55:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-03-20 14:55:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 14:55:27,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:27,150 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] [2022-03-20 14:55:27,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:27,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 14:55:27,363 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-20 14:55:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:27,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032886873] [2022-03-20 14:55:27,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-20 14:55:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:27,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733269244] [2022-03-20 14:55:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:27,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:27,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:27,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618179852] [2022-03-20 14:55:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:27,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:27,372 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:27,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 14:55:27,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:27,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:27,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 14:55:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 14:55:27,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 14:55:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733269244] [2022-03-20 14:55:28,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618179852] [2022-03-20 14:55:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618179852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:28,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:28,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 14:55:28,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032886873] [2022-03-20 14:55:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032886873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:28,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:28,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:55:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753765933] [2022-03-20 14:55:28,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:28,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:55:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:55:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:55:28,144 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) [2022-03-20 14:55:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:28,522 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-03-20 14:55:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:55:28,523 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 [2022-03-20 14:55:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:28,524 INFO L225 Difference]: With dead ends: 171 [2022-03-20 14:55:28,524 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 14:55:28,525 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 [2022-03-20 14:55:28,525 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:28,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 241 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:55:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 14:55:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-03-20 14:55:28,540 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) [2022-03-20 14:55:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2022-03-20 14:55:28,541 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 79 [2022-03-20 14:55:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:28,542 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2022-03-20 14:55:28,542 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) [2022-03-20 14:55:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2022-03-20 14:55:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:55:28,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:28,543 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] [2022-03-20 14:55:28,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:28,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 14:55:28,759 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-20 14:55:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1507517334] [2022-03-20 14:55:28,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-20 14:55:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458490118] [2022-03-20 14:55:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:28,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:28,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750781532] [2022-03-20 14:55:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:28,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:28,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 14:55:28,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:28,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 14:55:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 14:55:33,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 14:55:34,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458490118] [2022-03-20 14:55:34,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750781532] [2022-03-20 14:55:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750781532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:34,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:34,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 20 [2022-03-20 14:55:34,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:34,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1507517334] [2022-03-20 14:55:34,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1507517334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:34,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:34,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 14:55:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514706145] [2022-03-20 14:55:34,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:34,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 14:55:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:34,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 14:55:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-03-20 14:55:34,273 INFO L87 Difference]: Start difference. First operand 159 states and 183 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, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 14:55:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:37,125 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2022-03-20 14:55:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:55:37,126 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, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-03-20 14:55:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:37,127 INFO L225 Difference]: With dead ends: 188 [2022-03-20 14:55:37,127 INFO L226 Difference]: Without dead ends: 186 [2022-03-20 14:55:37,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=81, Invalid=424, Unknown=1, NotChecked=0, Total=506 [2022-03-20 14:55:37,128 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:37,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 214 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 346 Invalid, 0 Unknown, 56 Unchecked, 0.8s Time] [2022-03-20 14:55:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-20 14:55:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2022-03-20 14:55:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 109 states have internal predecessors, (114), 44 states have call successors, (44), 24 states have call predecessors, (44), 23 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 14:55:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 201 transitions. [2022-03-20 14:55:37,147 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 201 transitions. Word has length 92 [2022-03-20 14:55:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:37,147 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 201 transitions. [2022-03-20 14:55:37,147 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, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 14:55:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 201 transitions. [2022-03-20 14:55:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:55:37,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:37,148 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] [2022-03-20 14:55:37,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:37,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:37,364 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-20 14:55:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:37,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235455963] [2022-03-20 14:55:37,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-20 14:55:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157191960] [2022-03-20 14:55:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:37,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:37,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:37,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331406117] [2022-03-20 14:55:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:37,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:37,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:37,378 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:37,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 14:55:37,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:37,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 14:55:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 14:55:38,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 14:55:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157191960] [2022-03-20 14:55:38,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331406117] [2022-03-20 14:55:38,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331406117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:38,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:38,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-20 14:55:38,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235455963] [2022-03-20 14:55:38,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235455963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:38,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:38,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:55:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164776107] [2022-03-20 14:55:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:38,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:55:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:55:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:55:38,523 INFO L87 Difference]: Start difference. First operand 172 states and 201 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) [2022-03-20 14:55:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:38,801 INFO L93 Difference]: Finished difference Result 209 states and 243 transitions. [2022-03-20 14:55:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:55:38,802 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 [2022-03-20 14:55:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:38,804 INFO L225 Difference]: With dead ends: 209 [2022-03-20 14:55:38,804 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 14:55:38,804 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 [2022-03-20 14:55:38,805 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:38,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 188 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 14:55:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-20 14:55:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 131 states have internal predecessors, (140), 51 states have call successors, (51), 29 states have call predecessors, (51), 28 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 14:55:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 241 transitions. [2022-03-20 14:55:38,831 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 241 transitions. Word has length 92 [2022-03-20 14:55:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:38,831 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 241 transitions. [2022-03-20 14:55:38,831 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) [2022-03-20 14:55:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 241 transitions. [2022-03-20 14:55:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 14:55:38,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:38,832 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] [2022-03-20 14:55:38,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 14:55:39,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 14:55:39,048 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-20 14:55:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:39,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [50586515] [2022-03-20 14:55:39,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-20 14:55:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:39,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229717431] [2022-03-20 14:55:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:39,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:39,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517534597] [2022-03-20 14:55:39,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:39,057 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:39,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 14:55:39,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 14:55:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:39,315 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:55:39,331 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:55:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 14:55:45,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:47,355 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:57:00,514 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1) (* v_main_~s~0_BEFORE_CALL_112 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))))) (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)))))) is different from true [2022-03-20 14:58:05,924 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1) (* v_main_~s~0_BEFORE_CALL_112 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))))) (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)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 14:58:27,398 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~s~0_BEFORE_CALL_112 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 (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1) (* v_main_~s~0_BEFORE_CALL_112 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0))))) is different from true [2022-03-20 14:58:39,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229717431] [2022-03-20 14:58:39,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517534597] [2022-03-20 14:58:39,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517534597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:58:39,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:58:39,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 14:58:39,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [50586515] [2022-03-20 14:58:39,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [50586515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:39,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:39,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:58:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351088888] [2022-03-20 14:58:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:39,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:58:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:58:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=190, Unknown=7, NotChecked=90, Total=342 [2022-03-20 14:58:39,980 INFO L87 Difference]: Start difference. First operand 207 states and 241 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) [2022-03-20 14:59:05,504 WARN L232 SmtUtils]: Spent 25.36s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:59:07,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:59:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:08,114 INFO L93 Difference]: Finished difference Result 235 states and 279 transitions. [2022-03-20 14:59:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:59:08,115 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 [2022-03-20 14:59:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:08,116 INFO L225 Difference]: With dead ends: 235 [2022-03-20 14:59:08,116 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 14:59:08,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=76, Invalid=271, Unknown=7, NotChecked=108, Total=462 [2022-03-20 14:59:08,117 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:08,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 228 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 14:59:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 14:59:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2022-03-20 14:59:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 140 states have (on average 1.1071428571428572) internal successors, (155), 145 states have internal predecessors, (155), 60 states have call successors, (60), 31 states have call predecessors, (60), 30 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 14:59:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 274 transitions. [2022-03-20 14:59:08,148 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 274 transitions. Word has length 92 [2022-03-20 14:59:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:08,148 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 274 transitions. [2022-03-20 14:59:08,148 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) [2022-03-20 14:59:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 274 transitions. [2022-03-20 14:59:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:08,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:08,149 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] [2022-03-20 14:59:08,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:08,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 14:59:08,355 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-20 14:59:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:08,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346654673] [2022-03-20 14:59:08,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-20 14:59:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129475721] [2022-03-20 14:59:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:08,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:08,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991389519] [2022-03-20 14:59:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:08,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:08,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:08,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 14:59:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 14:59:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 14:59:08,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 14:59:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129475721] [2022-03-20 14:59:09,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991389519] [2022-03-20 14:59:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991389519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:09,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:09,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-20 14:59:09,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:09,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346654673] [2022-03-20 14:59:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346654673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:09,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:09,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:59:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43923077] [2022-03-20 14:59:09,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:09,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:59:09,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:59:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:59:09,166 INFO L87 Difference]: Start difference. First operand 231 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 14:59:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:09,517 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2022-03-20 14:59:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:59:09,517 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-20 14:59:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:09,518 INFO L225 Difference]: With dead ends: 265 [2022-03-20 14:59:09,518 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 14:59:09,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:59:09,519 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:09,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 254 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:59:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 14:59:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-20 14:59:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 166 states have internal predecessors, (178), 66 states have call successors, (66), 36 states have call predecessors, (66), 35 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 14:59:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 309 transitions. [2022-03-20 14:59:09,555 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 309 transitions. Word has length 97 [2022-03-20 14:59:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:09,555 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 309 transitions. [2022-03-20 14:59:09,555 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 14:59:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 309 transitions. [2022-03-20 14:59:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:09,556 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:09,556 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] [2022-03-20 14:59:09,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:09,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 14:59:09,767 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-20 14:59:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555795847] [2022-03-20 14:59:09,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-20 14:59:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471330434] [2022-03-20 14:59:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:09,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:09,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223623675] [2022-03-20 14:59:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:09,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:09,776 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:09,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 14:59:09,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:09,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 14:59:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 14:59:10,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 14:59:10,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471330434] [2022-03-20 14:59:10,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223623675] [2022-03-20 14:59:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223623675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:10,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:10,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-03-20 14:59:10,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555795847] [2022-03-20 14:59:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555795847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:10,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:10,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:59:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335918927] [2022-03-20 14:59:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:10,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:59:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:59:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:59:10,808 INFO L87 Difference]: Start difference. First operand 263 states and 309 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) [2022-03-20 14:59:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:11,430 INFO L93 Difference]: Finished difference Result 293 states and 343 transitions. [2022-03-20 14:59:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:59:11,430 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 [2022-03-20 14:59:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:11,432 INFO L225 Difference]: With dead ends: 293 [2022-03-20 14:59:11,432 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 14:59:11,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:59:11,432 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:11,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 324 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:59:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 14:59:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-03-20 14:59:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 179 states have (on average 1.106145251396648) internal successors, (198), 184 states have internal predecessors, (198), 72 states have call successors, (72), 40 states have call predecessors, (72), 39 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 14:59:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 341 transitions. [2022-03-20 14:59:11,473 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 341 transitions. Word has length 97 [2022-03-20 14:59:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:11,474 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 341 transitions. [2022-03-20 14:59:11,474 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) [2022-03-20 14:59:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 341 transitions. [2022-03-20 14:59:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 14:59:11,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:11,475 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] [2022-03-20 14:59:11,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:11,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:11,691 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-20 14:59:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168205632] [2022-03-20 14:59:11,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-20 14:59:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688823091] [2022-03-20 14:59:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:11,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99600207] [2022-03-20 14:59:11,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:11,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:11,699 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:11,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 14:59:11,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:11,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 14:59:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 97 proven. 33 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-03-20 14:59:12,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 14:59:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688823091] [2022-03-20 14:59:12,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99600207] [2022-03-20 14:59:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99600207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:12,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:12,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 14:59:12,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168205632] [2022-03-20 14:59:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168205632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:12,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:12,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:59:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171731260] [2022-03-20 14:59:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:12,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:59:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:59:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:59:12,495 INFO L87 Difference]: Start difference. First operand 291 states and 341 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 14:59:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:12,638 INFO L93 Difference]: Finished difference Result 309 states and 362 transitions. [2022-03-20 14:59:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:59:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2022-03-20 14:59:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:12,640 INFO L225 Difference]: With dead ends: 309 [2022-03-20 14:59:12,640 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 14:59:12,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:59:12,641 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:12,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 160 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:59:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 14:59:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-03-20 14:59:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 194 states have internal predecessors, (211), 75 states have call successors, (75), 42 states have call predecessors, (75), 41 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-20 14:59:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 360 transitions. [2022-03-20 14:59:12,685 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 360 transitions. Word has length 97 [2022-03-20 14:59:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:12,685 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 360 transitions. [2022-03-20 14:59:12,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 14:59:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 360 transitions. [2022-03-20 14:59:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 14:59:12,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:12,686 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] [2022-03-20 14:59:12,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:12,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:12,898 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-20 14:59:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:12,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203259421] [2022-03-20 14:59:12,899 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-20 14:59:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:12,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847038042] [2022-03-20 14:59:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:12,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193872513] [2022-03-20 14:59:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:12,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:12,906 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:12,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 14:59:13,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:13,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 14:59:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:18,726 WARN L232 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 15:03:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-20 15:03:38,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:04:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:04:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847038042] [2022-03-20 15:04:03,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:04:03,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193872513] [2022-03-20 15:04:03,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193872513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:04:03,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:04:03,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 15:04:03,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:04:03,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203259421] [2022-03-20 15:04:03,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203259421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:04:03,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:04:03,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:04:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199251944] [2022-03-20 15:04:03,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:04:03,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:04:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:04:03,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=463, Unknown=5, NotChecked=0, Total=552 [2022-03-20 15:04:03,909 INFO L87 Difference]: Start difference. First operand 307 states and 360 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:04:14,233 WARN L232 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 56 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:04:15,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:26,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:28,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:30,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:33,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:38,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:41,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:42,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:46,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:04:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:04:46,748 INFO L93 Difference]: Finished difference Result 332 states and 393 transitions. [2022-03-20 15:04:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:04:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-03-20 15:04:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:04:46,752 INFO L225 Difference]: With dead ends: 332 [2022-03-20 15:04:46,752 INFO L226 Difference]: Without dead ends: 330 [2022-03-20 15:04:46,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 74.7s TimeCoverageRelationStatistics Valid=110, Invalid=641, Unknown=5, NotChecked=0, Total=756 [2022-03-20 15:04:46,753 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:04:46,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 292 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 4 Unknown, 42 Unchecked, 25.7s Time] [2022-03-20 15:04:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-20 15:04:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 311. [2022-03-20 15:04:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 192 states have (on average 1.1145833333333333) internal successors, (214), 195 states have internal predecessors, (214), 77 states have call successors, (77), 42 states have call predecessors, (77), 41 states have return successors, (76), 73 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-20 15:04:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 367 transitions. [2022-03-20 15:04:46,806 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 367 transitions. Word has length 110 [2022-03-20 15:04:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:04:46,806 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 367 transitions. [2022-03-20 15:04:46,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:04:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 367 transitions. [2022-03-20 15:04:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:04:46,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:04:46,807 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] [2022-03-20 15:04:46,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:04:47,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 15:04:47,008 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:04:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:04:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-20 15:04:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:47,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555210106] [2022-03-20 15:04:47,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:04:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-20 15:04:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:04:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112135772] [2022-03-20 15:04:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:04:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:04:47,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:04:47,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396942860] [2022-03-20 15:04:47,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:04:47,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:04:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:04:47,019 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:04:47,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:04:47,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:04:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:04:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 15:04:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:04:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 15:04:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:04:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 15:04:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:04:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112135772] [2022-03-20 15:04:54,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:04:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396942860] [2022-03-20 15:04:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396942860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:04:54,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:04:54,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-03-20 15:04:54,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:04:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555210106] [2022-03-20 15:04:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555210106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:04:54,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:04:54,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:04:54,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821875206] [2022-03-20 15:04:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:04:54,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:04:54,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:54,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:04:54,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=353, Unknown=1, NotChecked=0, Total=420 [2022-03-20 15:04:54,569 INFO L87 Difference]: Start difference. First operand 311 states and 367 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-03-20 15:04:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:04:58,360 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2022-03-20 15:04:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:04:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 110 [2022-03-20 15:04:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:04:58,362 INFO L225 Difference]: With dead ends: 341 [2022-03-20 15:04:58,362 INFO L226 Difference]: Without dead ends: 339 [2022-03-20 15:04:58,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=84, Invalid=467, Unknown=1, NotChecked=0, Total=552 [2022-03-20 15:04:58,363 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:04:58,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 293 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 536 Invalid, 0 Unknown, 6 Unchecked, 1.8s Time] [2022-03-20 15:04:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-20 15:04:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 324. [2022-03-20 15:04:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 203 states have internal predecessors, (222), 82 states have call successors, (82), 43 states have call predecessors, (82), 42 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-20 15:04:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 385 transitions. [2022-03-20 15:04:58,427 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 385 transitions. Word has length 110 [2022-03-20 15:04:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:04:58,427 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 385 transitions. [2022-03-20 15:04:58,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-03-20 15:04:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 385 transitions. [2022-03-20 15:04:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:04:58,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:04:58,428 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] [2022-03-20 15:04:58,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:04:58,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 15:04:58,631 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:04:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:04:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-20 15:04:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299493545] [2022-03-20 15:04:58,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:04:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-20 15:04:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:04:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764218342] [2022-03-20 15:04:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:04:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:04:58,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:04:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133708550] [2022-03-20 15:04:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:04:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:04:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:04:58,640 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:04:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:04:58,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:04:58,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:04:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 15:04:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 80 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 15:05:00,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 33 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-03-20 15:05:01,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764218342] [2022-03-20 15:05:01,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133708550] [2022-03-20 15:05:01,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133708550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:01,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:01,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-20 15:05:01,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299493545] [2022-03-20 15:05:01,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299493545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:01,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:01,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:05:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551707123] [2022-03-20 15:05:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:01,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:05:01,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:05:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:05:01,326 INFO L87 Difference]: Start difference. First operand 324 states and 385 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) [2022-03-20 15:05:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:02,350 INFO L93 Difference]: Finished difference Result 358 states and 422 transitions. [2022-03-20 15:05:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:05:02,351 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 [2022-03-20 15:05:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:02,353 INFO L225 Difference]: With dead ends: 358 [2022-03-20 15:05:02,353 INFO L226 Difference]: Without dead ends: 356 [2022-03-20 15:05:02,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:05:02,353 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:02,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 283 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 15:05:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-03-20 15:05:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 280. [2022-03-20 15:05:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 175 states have (on average 1.0971428571428572) internal successors, (192), 179 states have internal predecessors, (192), 64 states have call successors, (64), 41 states have call predecessors, (64), 40 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 15:05:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 319 transitions. [2022-03-20 15:05:02,406 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 319 transitions. Word has length 110 [2022-03-20 15:05:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:02,406 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 319 transitions. [2022-03-20 15:05:02,406 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) [2022-03-20 15:05:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 319 transitions. [2022-03-20 15:05:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:05:02,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:02,407 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] [2022-03-20 15:05:02,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:02,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:02,608 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-20 15:05:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:02,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [939156552] [2022-03-20 15:05:02,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-20 15:05:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:02,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317958890] [2022-03-20 15:05:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:02,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461603060] [2022-03-20 15:05:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:05:02,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:02,616 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:05:02,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:05:02,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:05:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:05:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 67 proven. 40 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-03-20 15:05:03,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317958890] [2022-03-20 15:05:03,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461603060] [2022-03-20 15:05:03,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461603060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:05:03,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:05:03,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 15:05:03,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [939156552] [2022-03-20 15:05:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [939156552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:03,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:03,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:05:03,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789496021] [2022-03-20 15:05:03,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:03,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:05:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:05:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:05:03,665 INFO L87 Difference]: Start difference. First operand 280 states and 319 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) [2022-03-20 15:05:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:04,087 INFO L93 Difference]: Finished difference Result 326 states and 376 transitions. [2022-03-20 15:05:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:05:04,087 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 [2022-03-20 15:05:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:04,088 INFO L225 Difference]: With dead ends: 326 [2022-03-20 15:05:04,089 INFO L226 Difference]: Without dead ends: 324 [2022-03-20 15:05:04,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:05:04,089 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:04,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 216 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:05:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-20 15:05:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 294. [2022-03-20 15:05:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 184 states have (on average 1.0978260869565217) internal successors, (202), 188 states have internal predecessors, (202), 67 states have call successors, (67), 43 states have call predecessors, (67), 42 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-20 15:05:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 335 transitions. [2022-03-20 15:05:04,150 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 335 transitions. Word has length 110 [2022-03-20 15:05:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:04,151 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 335 transitions. [2022-03-20 15:05:04,151 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) [2022-03-20 15:05:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 335 transitions. [2022-03-20 15:05:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:05:04,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:04,152 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] [2022-03-20 15:05:04,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:04,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:04,357 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:04,357 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 25 times [2022-03-20 15:05:04,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:04,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1723408957] [2022-03-20 15:05:04,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 26 times [2022-03-20 15:05:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:04,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453101892] [2022-03-20 15:05:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:04,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800105317] [2022-03-20 15:05:04,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:05:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:04,367 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:05:04,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:05:04,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:05:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:04,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 15:05:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 90 proven. 59 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-20 15:05:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 15:05:05,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453101892] [2022-03-20 15:05:05,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800105317] [2022-03-20 15:05:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800105317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:05,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:05,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2022-03-20 15:05:05,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:05,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1723408957] [2022-03-20 15:05:05,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1723408957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:05,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:05,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:05:05,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709425296] [2022-03-20 15:05:05,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:05,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:05:05,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:05:05,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:05:05,597 INFO L87 Difference]: Start difference. First operand 294 states and 335 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:05:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:06,262 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2022-03-20 15:05:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:05:06,263 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), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-20 15:05:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:06,264 INFO L225 Difference]: With dead ends: 316 [2022-03-20 15:05:06,264 INFO L226 Difference]: Without dead ends: 314 [2022-03-20 15:05:06,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:05:06,265 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:06,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 245 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:05:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-20 15:05:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 266. [2022-03-20 15:05:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 166 states have (on average 1.0963855421686748) internal successors, (182), 170 states have internal predecessors, (182), 61 states have call successors, (61), 39 states have call predecessors, (61), 38 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 15:05:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 303 transitions. [2022-03-20 15:05:06,323 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 303 transitions. Word has length 110 [2022-03-20 15:05:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:06,323 INFO L478 AbstractCegarLoop]: Abstraction has 266 states and 303 transitions. [2022-03-20 15:05:06,324 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), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:05:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 303 transitions. [2022-03-20 15:05:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 15:05:06,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:06,324 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] [2022-03-20 15:05:06,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:06,527 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 [2022-03-20 15:05:06,527 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 27 times [2022-03-20 15:05:06,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:06,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359524111] [2022-03-20 15:05:06,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 28 times [2022-03-20 15:05:06,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:06,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965929657] [2022-03-20 15:05:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:06,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:06,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035061763] [2022-03-20 15:05:06,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:05:06,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:06,539 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) [2022-03-20 15:05:06,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:05:06,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:05:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 15:05:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 15:05:07,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 15:05:07,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965929657] [2022-03-20 15:05:07,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035061763] [2022-03-20 15:05:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035061763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:07,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:07,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 15:05:07,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:07,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359524111] [2022-03-20 15:05:07,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359524111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:07,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:07,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:05:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428825932] [2022-03-20 15:05:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:07,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:05:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:05:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:05:07,665 INFO L87 Difference]: Start difference. First operand 266 states and 303 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) [2022-03-20 15:05:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:08,308 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2022-03-20 15:05:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:05:08,309 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 [2022-03-20 15:05:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:08,310 INFO L225 Difference]: With dead ends: 316 [2022-03-20 15:05:08,310 INFO L226 Difference]: Without dead ends: 314 [2022-03-20 15:05:08,311 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 [2022-03-20 15:05:08,313 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:08,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 356 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:05:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-20 15:05:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 282. [2022-03-20 15:05:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 181 states have internal predecessors, (193), 65 states have call successors, (65), 41 states have call predecessors, (65), 40 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 15:05:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 322 transitions. [2022-03-20 15:05:08,382 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 322 transitions. Word has length 110 [2022-03-20 15:05:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:08,383 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 322 transitions. [2022-03-20 15:05:08,383 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) [2022-03-20 15:05:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 322 transitions. [2022-03-20 15:05:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:08,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:08,384 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] [2022-03-20 15:05:08,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:08,604 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 [2022-03-20 15:05:08,604 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 29 times [2022-03-20 15:05:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834596035] [2022-03-20 15:05:08,605 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 30 times [2022-03-20 15:05:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911771886] [2022-03-20 15:05:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:08,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:08,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396238770] [2022-03-20 15:05:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:05:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:08,625 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) [2022-03-20 15:05:08,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:05:08,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:05:08,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:05:08,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-20 15:05:11,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:05:15,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911771886] [2022-03-20 15:05:15,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396238770] [2022-03-20 15:05:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396238770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:15,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:15,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 15:05:15,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834596035] [2022-03-20 15:05:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834596035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:15,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:15,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:05:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898066672] [2022-03-20 15:05:15,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:15,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:05:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:05:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-03-20 15:05:15,623 INFO L87 Difference]: Start difference. First operand 282 states and 322 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) [2022-03-20 15:05:17,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:05:21,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:05:24,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:05:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:24,916 INFO L93 Difference]: Finished difference Result 342 states and 399 transitions. [2022-03-20 15:05:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:05:24,916 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 [2022-03-20 15:05:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:24,918 INFO L225 Difference]: With dead ends: 342 [2022-03-20 15:05:24,918 INFO L226 Difference]: Without dead ends: 340 [2022-03-20 15:05:24,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2022-03-20 15:05:24,918 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:24,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-03-20 15:05:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-03-20 15:05:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 304. [2022-03-20 15:05:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 189 states have (on average 1.0952380952380953) internal successors, (207), 195 states have internal predecessors, (207), 71 states have call successors, (71), 44 states have call predecessors, (71), 43 states have return successors, (70), 64 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-20 15:05:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 348 transitions. [2022-03-20 15:05:24,991 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 348 transitions. Word has length 115 [2022-03-20 15:05:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:24,992 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 348 transitions. [2022-03-20 15:05:24,992 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) [2022-03-20 15:05:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 348 transitions. [2022-03-20 15:05:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:24,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:24,992 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] [2022-03-20 15:05:25,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:25,212 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 [2022-03-20 15:05:25,212 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 31 times [2022-03-20 15:05:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496112062] [2022-03-20 15:05:25,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 32 times [2022-03-20 15:05:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:25,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426068231] [2022-03-20 15:05:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:25,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140910760] [2022-03-20 15:05:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:05:25,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:25,221 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) [2022-03-20 15:05:25,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:05:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:05:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:25,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 15:05:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 83 proven. 69 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:05:29,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 120 proven. 20 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-03-20 15:05:30,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426068231] [2022-03-20 15:05:30,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140910760] [2022-03-20 15:05:30,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140910760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:30,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:30,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-20 15:05:30,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496112062] [2022-03-20 15:05:30,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496112062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:30,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:30,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:05:30,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266932888] [2022-03-20 15:05:30,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:30,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:05:30,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:05:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:05:30,060 INFO L87 Difference]: Start difference. First operand 304 states and 348 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2022-03-20 15:05:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:32,484 INFO L93 Difference]: Finished difference Result 334 states and 382 transitions. [2022-03-20 15:05:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:05:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 [2022-03-20 15:05:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:32,486 INFO L225 Difference]: With dead ends: 334 [2022-03-20 15:05:32,486 INFO L226 Difference]: Without dead ends: 332 [2022-03-20 15:05:32,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:05:32,487 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:32,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 396 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 15:05:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-20 15:05:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-03-20 15:05:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 207 states have (on average 1.0966183574879227) internal successors, (227), 213 states have internal predecessors, (227), 77 states have call successors, (77), 48 states have call predecessors, (77), 47 states have return successors, (76), 70 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-20 15:05:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 380 transitions. [2022-03-20 15:05:32,571 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 380 transitions. Word has length 115 [2022-03-20 15:05:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:32,571 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 380 transitions. [2022-03-20 15:05:32,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2022-03-20 15:05:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 380 transitions. [2022-03-20 15:05:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:32,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:32,572 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] [2022-03-20 15:05:32,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:32,776 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 [2022-03-20 15:05:32,776 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 33 times [2022-03-20 15:05:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015525992] [2022-03-20 15:05:32,777 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 34 times [2022-03-20 15:05:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:32,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253614670] [2022-03-20 15:05:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:32,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:32,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771618405] [2022-03-20 15:05:32,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:05:32,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:32,783 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) [2022-03-20 15:05:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:05:32,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:05:32,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:32,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 15:05:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 15:05:33,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:05:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253614670] [2022-03-20 15:05:33,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771618405] [2022-03-20 15:05:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771618405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:33,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-20 15:05:33,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015525992] [2022-03-20 15:05:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015525992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:33,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:05:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230458791] [2022-03-20 15:05:33,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:33,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:05:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:05:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:05:33,994 INFO L87 Difference]: Start difference. First operand 332 states and 380 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) [2022-03-20 15:05:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:34,654 INFO L93 Difference]: Finished difference Result 380 states and 433 transitions. [2022-03-20 15:05:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:05:34,655 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 [2022-03-20 15:05:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:34,656 INFO L225 Difference]: With dead ends: 380 [2022-03-20 15:05:34,656 INFO L226 Difference]: Without dead ends: 378 [2022-03-20 15:05:34,656 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 [2022-03-20 15:05:34,657 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:34,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 361 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:05:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-20 15:05:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 350. [2022-03-20 15:05:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 219 states have (on average 1.095890410958904) internal successors, (240), 225 states have internal predecessors, (240), 80 states have call successors, (80), 51 states have call predecessors, (80), 50 states have return successors, (79), 73 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 15:05:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 399 transitions. [2022-03-20 15:05:34,746 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 399 transitions. Word has length 115 [2022-03-20 15:05:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:34,746 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 399 transitions. [2022-03-20 15:05:34,747 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) [2022-03-20 15:05:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 399 transitions. [2022-03-20 15:05:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:34,747 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:34,748 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] [2022-03-20 15:05:34,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:34,963 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 [2022-03-20 15:05:34,963 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 35 times [2022-03-20 15:05:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926895438] [2022-03-20 15:05:34,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 36 times [2022-03-20 15:05:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158158049] [2022-03-20 15:05:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:34,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:34,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428423511] [2022-03-20 15:05:34,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:05:34,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:34,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:34,973 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) [2022-03-20 15:05:34,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:05:35,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:05:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:05:35,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 99 proven. 39 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 15:05:35,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:05:37,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158158049] [2022-03-20 15:05:37,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428423511] [2022-03-20 15:05:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428423511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:37,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:37,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 15:05:37,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926895438] [2022-03-20 15:05:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926895438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:37,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:37,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:05:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378201947] [2022-03-20 15:05:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:37,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:05:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:05:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2022-03-20 15:05:37,536 INFO L87 Difference]: Start difference. First operand 350 states and 399 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) [2022-03-20 15:05:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:38,006 INFO L93 Difference]: Finished difference Result 366 states and 418 transitions. [2022-03-20 15:05:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:05:38,007 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 [2022-03-20 15:05:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:38,008 INFO L225 Difference]: With dead ends: 366 [2022-03-20 15:05:38,008 INFO L226 Difference]: Without dead ends: 364 [2022-03-20 15:05:38,008 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 [2022-03-20 15:05:38,009 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:38,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 240 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-03-20 15:05:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-20 15:05:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2022-03-20 15:05:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 223 states have (on average 1.094170403587444) internal successors, (244), 230 states have internal predecessors, (244), 83 states have call successors, (83), 52 states have call predecessors, (83), 51 states have return successors, (82), 75 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 15:05:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 409 transitions. [2022-03-20 15:05:38,106 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 409 transitions. Word has length 115 [2022-03-20 15:05:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:38,106 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 409 transitions. [2022-03-20 15:05:38,106 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) [2022-03-20 15:05:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 409 transitions. [2022-03-20 15:05:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:38,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:38,107 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] [2022-03-20 15:05:38,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:38,319 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 [2022-03-20 15:05:38,319 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 37 times [2022-03-20 15:05:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:38,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943845417] [2022-03-20 15:05:38,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 38 times [2022-03-20 15:05:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:38,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313904959] [2022-03-20 15:05:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:38,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290982767] [2022-03-20 15:05:38,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:05:38,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:38,327 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) [2022-03-20 15:05:38,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:05:38,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:05:38,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 15:05:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 112 proven. 67 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 15:05:39,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:05:39,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313904959] [2022-03-20 15:05:39,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290982767] [2022-03-20 15:05:39,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290982767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:39,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:39,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-20 15:05:39,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943845417] [2022-03-20 15:05:39,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943845417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:39,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:39,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:05:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26672979] [2022-03-20 15:05:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:39,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:05:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:05:39,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:05:39,979 INFO L87 Difference]: Start difference. First operand 358 states and 409 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) [2022-03-20 15:05:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:41,922 INFO L93 Difference]: Finished difference Result 396 states and 453 transitions. [2022-03-20 15:05:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:05:41,922 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 [2022-03-20 15:05:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:41,924 INFO L225 Difference]: With dead ends: 396 [2022-03-20 15:05:41,924 INFO L226 Difference]: Without dead ends: 394 [2022-03-20 15:05:41,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:05:41,924 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:41,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 371 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 15:05:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-20 15:05:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-03-20 15:05:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 232 states have (on average 1.0948275862068966) internal successors, (254), 239 states have internal predecessors, (254), 86 states have call successors, (86), 54 states have call predecessors, (86), 53 states have return successors, (85), 78 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 15:05:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 425 transitions. [2022-03-20 15:05:42,033 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 425 transitions. Word has length 115 [2022-03-20 15:05:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:42,033 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 425 transitions. [2022-03-20 15:05:42,033 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) [2022-03-20 15:05:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 425 transitions. [2022-03-20 15:05:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 15:05:42,034 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:42,034 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] [2022-03-20 15:05:42,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:42,247 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 [2022-03-20 15:05:42,247 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 39 times [2022-03-20 15:05:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:42,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572575655] [2022-03-20 15:05:42,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 40 times [2022-03-20 15:05:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:42,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504433651] [2022-03-20 15:05:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:42,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:42,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949618358] [2022-03-20 15:05:42,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:05:42,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:42,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:42,254 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) [2022-03-20 15:05:42,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:05:42,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:05:42,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 15:05:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 57 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:05:44,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 15:05:44,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504433651] [2022-03-20 15:05:44,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949618358] [2022-03-20 15:05:44,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949618358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:44,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-03-20 15:05:44,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572575655] [2022-03-20 15:05:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572575655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:44,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:05:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714366352] [2022-03-20 15:05:44,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:44,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:05:44,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:05:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:05:44,821 INFO L87 Difference]: Start difference. First operand 372 states and 425 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) [2022-03-20 15:05:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:46,869 INFO L93 Difference]: Finished difference Result 402 states and 459 transitions. [2022-03-20 15:05:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:05:46,870 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 [2022-03-20 15:05:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:46,871 INFO L225 Difference]: With dead ends: 402 [2022-03-20 15:05:46,871 INFO L226 Difference]: Without dead ends: 400 [2022-03-20 15:05:46,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:05:46,872 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:46,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 515 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 15:05:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-20 15:05:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 360. [2022-03-20 15:05:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 224 states have (on average 1.09375) internal successors, (245), 232 states have internal predecessors, (245), 84 states have call successors, (84), 52 states have call predecessors, (84), 51 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 15:05:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 412 transitions. [2022-03-20 15:05:46,980 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 412 transitions. Word has length 115 [2022-03-20 15:05:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:46,980 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 412 transitions. [2022-03-20 15:05:46,980 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) [2022-03-20 15:05:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 412 transitions. [2022-03-20 15:05:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:05:46,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:46,981 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] [2022-03-20 15:05:46,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 15:05:47,191 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 [2022-03-20 15:05:47,191 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 41 times [2022-03-20 15:05:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094539989] [2022-03-20 15:05:47,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 42 times [2022-03-20 15:05:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621749077] [2022-03-20 15:05:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:47,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697099494] [2022-03-20 15:05:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:05:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:47,203 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) [2022-03-20 15:05:47,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:05:47,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:05:47,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:05:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 30 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-03-20 15:05:49,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:51,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:51,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621749077] [2022-03-20 15:05:51,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:51,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697099494] [2022-03-20 15:05:51,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697099494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:05:51,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:05:51,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 15:05:51,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:51,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094539989] [2022-03-20 15:05:51,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094539989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:51,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:51,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:05:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020062580] [2022-03-20 15:05:51,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:51,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:05:51,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:05:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=343, Unknown=1, NotChecked=0, Total=420 [2022-03-20 15:05:51,604 INFO L87 Difference]: Start difference. First operand 360 states and 412 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 15:05:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:05:57,800 INFO L93 Difference]: Finished difference Result 426 states and 506 transitions. [2022-03-20 15:05:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:05:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 128 [2022-03-20 15:05:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:05:57,802 INFO L225 Difference]: With dead ends: 426 [2022-03-20 15:05:57,802 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 15:05:57,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=181, Invalid=748, Unknown=1, NotChecked=0, Total=930 [2022-03-20 15:05:57,804 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:05:57,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 235 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 272 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-03-20 15:05:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 15:05:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2022-03-20 15:05:57,882 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) [2022-03-20 15:05:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 255 transitions. [2022-03-20 15:05:57,882 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 255 transitions. Word has length 128 [2022-03-20 15:05:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:05:57,882 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 255 transitions. [2022-03-20 15:05:57,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 15:05:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 255 transitions. [2022-03-20 15:05:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:05:57,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:05:57,883 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] [2022-03-20 15:05:57,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 15:05:58,089 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 [2022-03-20 15:05:58,089 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:05:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:05:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 43 times [2022-03-20 15:05:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235429035] [2022-03-20 15:05:58,090 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:05:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 44 times [2022-03-20 15:05:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:05:58,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373148551] [2022-03-20 15:05:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:05:58,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:05:58,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:05:58,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695540136] [2022-03-20 15:05:58,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:05:58,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:05:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:05:58,096 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) [2022-03-20 15:05:58,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 15:05:58,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:05:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:05:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 15:05:58,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:05:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 134 proven. 90 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:05:58,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 15:05:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373148551] [2022-03-20 15:05:59,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695540136] [2022-03-20 15:05:59,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695540136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:59,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:59,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 15:05:59,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235429035] [2022-03-20 15:05:59,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235429035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:59,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:59,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:05:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641237940] [2022-03-20 15:05:59,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:59,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:05:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:05:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:05:59,318 INFO L87 Difference]: Start difference. First operand 227 states and 255 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:06:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:06:00,344 INFO L93 Difference]: Finished difference Result 275 states and 312 transitions. [2022-03-20 15:06:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:06:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 128 [2022-03-20 15:06:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:06:00,346 INFO L225 Difference]: With dead ends: 275 [2022-03-20 15:06:00,346 INFO L226 Difference]: Without dead ends: 273 [2022-03-20 15:06:00,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:06:00,346 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 12 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 15:06:00,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 472 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 15:06:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-20 15:06:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 262. [2022-03-20 15:06:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 164 states have (on average 1.0853658536585367) internal successors, (178), 169 states have internal predecessors, (178), 59 states have call successors, (59), 39 states have call predecessors, (59), 38 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 15:06:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 295 transitions. [2022-03-20 15:06:00,444 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 295 transitions. Word has length 128 [2022-03-20 15:06:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:06:00,444 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 295 transitions. [2022-03-20 15:06:00,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:06:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 295 transitions. [2022-03-20 15:06:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:06:00,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:06:00,445 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] [2022-03-20 15:06:00,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 15:06:00,655 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 [2022-03-20 15:06:00,655 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:06:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:06:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 45 times [2022-03-20 15:06:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:06:00,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937438013] [2022-03-20 15:06:00,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:06:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 46 times [2022-03-20 15:06:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:06:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338393968] [2022-03-20 15:06:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:06:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:06:00,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:06:00,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987655234] [2022-03-20 15:06:00,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:06:00,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:06:00,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:06:00,662 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) [2022-03-20 15:06:00,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 15:06:00,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:06:00,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:06:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 15:06:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:06:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 140 proven. 156 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 15:06:02,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:06:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 15:06:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:06:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338393968] [2022-03-20 15:06:02,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:06:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987655234] [2022-03-20 15:06:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987655234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:06:02,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:06:02,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-20 15:06:02,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:06:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937438013] [2022-03-20 15:06:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937438013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:06:02,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:06:02,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:06:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332649750] [2022-03-20 15:06:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:06:02,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:06:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:06:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:06:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:06:02,503 INFO L87 Difference]: Start difference. First operand 262 states and 295 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) [2022-03-20 15:06:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:06:03,257 INFO L93 Difference]: Finished difference Result 302 states and 342 transitions. [2022-03-20 15:06:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:06:03,257 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 [2022-03-20 15:06:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:06:03,258 INFO L225 Difference]: With dead ends: 302 [2022-03-20 15:06:03,258 INFO L226 Difference]: Without dead ends: 300 [2022-03-20 15:06:03,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:06:03,259 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:06:03,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 403 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:06:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-20 15:06:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2022-03-20 15:06:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 180 states have (on average 1.0833333333333333) internal successors, (195), 186 states have internal predecessors, (195), 64 states have call successors, (64), 43 states have call predecessors, (64), 42 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 15:06:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 322 transitions. [2022-03-20 15:06:03,365 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 322 transitions. Word has length 128 [2022-03-20 15:06:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:06:03,365 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 322 transitions. [2022-03-20 15:06:03,365 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) [2022-03-20 15:06:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 322 transitions. [2022-03-20 15:06:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 15:06:03,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:06:03,366 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] [2022-03-20 15:06:03,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 15:06:03,570 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 [2022-03-20 15:06:03,570 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:06:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:06:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 47 times [2022-03-20 15:06:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:06:03,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415242238] [2022-03-20 15:06:03,571 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:06:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 48 times [2022-03-20 15:06:03,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:06:03,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829398546] [2022-03-20 15:06:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:06:03,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:06:03,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:06:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143747742] [2022-03-20 15:06:03,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:06:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:06:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:06:03,579 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) [2022-03-20 15:06:03,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 15:06:03,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:06:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:06:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 15:06:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:06:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-20 15:06:03,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:06:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 15:06:04,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:06:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829398546] [2022-03-20 15:06:04,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:06:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143747742] [2022-03-20 15:06:04,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143747742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:06:04,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:06:04,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 15:06:04,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:06:04,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415242238] [2022-03-20 15:06:04,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415242238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:06:04,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:06:04,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:06:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266243802] [2022-03-20 15:06:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:06:04,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:06:04,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:06:04,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:06:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:06:04,078 INFO L87 Difference]: Start difference. First operand 287 states and 322 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) [2022-03-20 15:06:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:06:04,649 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-03-20 15:06:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:06:04,650 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 [2022-03-20 15:06:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:06:04,651 INFO L225 Difference]: With dead ends: 287 [2022-03-20 15:06:04,651 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 15:06:04,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:06:04,651 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:06:04,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2022-03-20 15:06:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 15:06:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 15:06:04,652 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) [2022-03-20 15:06:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 15:06:04,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-03-20 15:06:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:06:04,652 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 15:06:04,652 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) [2022-03-20 15:06:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 15:06:04,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 15:06:04,654 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:06:04,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 15:06:04,855 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 [2022-03-20 15:06:04,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 15:06:33,609 WARN L232 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 328 DAG size of output: 6 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 15:09:37,297 WARN L232 SmtUtils]: Spent 3.02m on a formula simplification. DAG size of input: 663 DAG size of output: 29 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)