/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:28:15,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:28:15,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:28:15,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 19:28:15,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:28:15,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:28:15,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:28:15,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:28:15,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:28:15,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:28:15,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:28:15,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:28:15,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:28:15,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:28:15,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:28:15,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:28:15,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 19:28:15,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:28:15,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:28:15,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:28:15,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:28:15,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:28:15,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:28:15,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:28:15,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:28:15,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:28:15,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:28:15,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:28:15,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:28:15,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:28:15,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:28:15,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:28:15,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:28:15,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:28:15,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:28:15,892 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:28:15,892 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:28:16,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:28:16,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:28:16,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:28:16,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:28:16,084 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:28:16,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-02-23 19:28:16,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/254628595/d86e5b95793e408d96e3e227bdf7a064/FLAG6b698fd06 [2022-02-23 19:28:16,475 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:28:16,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-02-23 19:28:16,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/254628595/d86e5b95793e408d96e3e227bdf7a064/FLAG6b698fd06 [2022-02-23 19:28:16,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/254628595/d86e5b95793e408d96e3e227bdf7a064 [2022-02-23 19:28:16,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:28:16,498 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:28:16,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:28:16,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:28:16,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:28:16,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8e83f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16, skipping insertion in model container [2022-02-23 19:28:16,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:28:16,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:28:16,649 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/ps4-ll_unwindbound50.c[458,471] [2022-02-23 19:28:16,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:28:16,679 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:28:16,687 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/ps4-ll_unwindbound50.c[458,471] [2022-02-23 19:28:16,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:28:16,701 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:28:16,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16 WrapperNode [2022-02-23 19:28:16,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:28:16,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:28:16,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:28:16,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:28:16,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:28:16,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:28:16,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:28:16,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:28:16,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:28:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:16,751 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) [2022-02-23 19:28:16,756 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 [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:28:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:28:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:28:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:28:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:28:16,819 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:28:16,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:28:16,929 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:28:16,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:28:16,933 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:28:16,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:16 BoogieIcfgContainer [2022-02-23 19:28:16,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:28:16,935 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:28:16,935 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:28:16,936 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:28:16,938 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:16" (1/1) ... [2022-02-23 19:28:16,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:28:16 BasicIcfg [2022-02-23 19:28:16,951 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:28:16,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:28:16,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:28:16,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:28:16,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:28:16" (1/4) ... [2022-02-23 19:28:16,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b1ea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:28:16, skipping insertion in model container [2022-02-23 19:28:16,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:16" (2/4) ... [2022-02-23 19:28:16,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b1ea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:28:16, skipping insertion in model container [2022-02-23 19:28:16,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:16" (3/4) ... [2022-02-23 19:28:16,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b1ea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:28:16, skipping insertion in model container [2022-02-23 19:28:16,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:28:16" (4/4) ... [2022-02-23 19:28:16,956 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.cJordan [2022-02-23 19:28:16,959 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:28:16,959 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:28:16,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:28:16,992 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:28:16,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:28:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 19:28:17,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:17,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:17,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2022-02-23 19:28:17,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:17,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521581191] [2022-02-23 19:28:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:17,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:28:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:17,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:17,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521581191] [2022-02-23 19:28:17,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521581191] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:28:17,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:28:17,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:28:17,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670091558] [2022-02-23 19:28:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:17,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:28:17,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:28:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:28:17,203 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:17,256 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-23 19:28:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:28:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 19:28:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:17,263 INFO L225 Difference]: With dead ends: 24 [2022-02-23 19:28:17,263 INFO L226 Difference]: Without dead ends: 19 [2022-02-23 19:28:17,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:28:17,269 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:17,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-23 19:28:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-02-23 19:28:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 19:28:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-02-23 19:28:17,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-02-23 19:28:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:17,294 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-02-23 19:28:17,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-02-23 19:28:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 19:28:17,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:17,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:17,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:28:17,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2022-02-23 19:28:17,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:17,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360746312] [2022-02-23 19:28:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:17,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:17,332 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:17,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429357669] [2022-02-23 19:28:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:17,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:17,347 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) [2022-02-23 19:28:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 19:28:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:17,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 19:28:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:17,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:28:17,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:17,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360746312] [2022-02-23 19:28:17,469 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:17,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429357669] [2022-02-23 19:28:17,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429357669] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:28:17,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:28:17,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:28:17,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344900156] [2022-02-23 19:28:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:28:17,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:28:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:28:17,477 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:17,503 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-02-23 19:28:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:28:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 19:28:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:17,504 INFO L225 Difference]: With dead ends: 20 [2022-02-23 19:28:17,504 INFO L226 Difference]: Without dead ends: 20 [2022-02-23 19:28:17,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:28:17,505 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:17,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-23 19:28:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-23 19:28:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 19:28:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-23 19:28:17,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-02-23 19:28:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:17,508 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-23 19:28:17,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-23 19:28:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 19:28:17,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:17,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:17,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 19:28:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:17,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2022-02-23 19:28:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832917342] [2022-02-23 19:28:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:17,753 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:17,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108188953] [2022-02-23 19:28:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:17,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:17,767 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) [2022-02-23 19:28:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 19:28:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:28:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:17,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:28:17,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:17,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832917342] [2022-02-23 19:28:17,864 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:17,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108188953] [2022-02-23 19:28:17,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108188953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:28:17,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:28:17,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:28:17,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554906426] [2022-02-23 19:28:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:17,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:28:17,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:28:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:28:17,865 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:17,903 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-02-23 19:28:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:28:17,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 19:28:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:17,904 INFO L225 Difference]: With dead ends: 28 [2022-02-23 19:28:17,904 INFO L226 Difference]: Without dead ends: 26 [2022-02-23 19:28:17,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:28:17,905 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:17,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-23 19:28:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-23 19:28:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:28:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-02-23 19:28:17,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2022-02-23 19:28:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-02-23 19:28:17,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:28:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-02-23 19:28:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 19:28:17,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:17,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:18,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 19:28:18,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:18,151 INFO L85 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2022-02-23 19:28:18,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:18,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513284041] [2022-02-23 19:28:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:18,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:18,168 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:18,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885845213] [2022-02-23 19:28:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:18,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:18,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:18,191 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) [2022-02-23 19:28:18,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 19:28:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:18,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:28:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:18,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:18,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513284041] [2022-02-23 19:28:18,378 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:18,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885845213] [2022-02-23 19:28:18,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885845213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:28:18,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:28:18,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 19:28:18,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374077202] [2022-02-23 19:28:18,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:28:18,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:28:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:28:18,379 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:28:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:18,465 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-02-23 19:28:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 19:28:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-02-23 19:28:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:18,469 INFO L225 Difference]: With dead ends: 52 [2022-02-23 19:28:18,469 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 19:28:18,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:28:18,473 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:18,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 19:28:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-02-23 19:28:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:28:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-02-23 19:28:18,490 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 20 [2022-02-23 19:28:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:18,490 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-02-23 19:28:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:28:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-02-23 19:28:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 19:28:18,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:18,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:18,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 19:28:18,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:18,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2022-02-23 19:28:18,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:18,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267529334] [2022-02-23 19:28:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:18,720 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:18,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172697934] [2022-02-23 19:28:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:18,722 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) [2022-02-23 19:28:18,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 19:28:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 19:28:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:18,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 19:28:19,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:19,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267529334] [2022-02-23 19:28:19,668 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:19,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172697934] [2022-02-23 19:28:19,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172697934] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:19,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:19,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 19:28:19,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193720362] [2022-02-23 19:28:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:19,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:28:19,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:28:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 19:28:19,669 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:28:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:19,690 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-02-23 19:28:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:28:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-23 19:28:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:19,692 INFO L225 Difference]: With dead ends: 60 [2022-02-23 19:28:19,692 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 19:28:19,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:28:19,693 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:19,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 19:28:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-02-23 19:28:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-02-23 19:28:19,699 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 20 [2022-02-23 19:28:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:19,699 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-02-23 19:28:19,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:28:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-02-23 19:28:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:28:19,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:19,700 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:19,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 19:28:19,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:19,901 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2022-02-23 19:28:19,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:19,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122310359] [2022-02-23 19:28:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:19,910 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:19,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008593271] [2022-02-23 19:28:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:19,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:19,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:19,914 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) [2022-02-23 19:28:19,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 19:28:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 19:28:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 19:28:20,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:40,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:40,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122310359] [2022-02-23 19:28:40,137 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:40,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008593271] [2022-02-23 19:28:40,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008593271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:40,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:40,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 19:28:40,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191892722] [2022-02-23 19:28:40,138 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:40,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 19:28:40,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 19:28:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=161, Unknown=3, NotChecked=0, Total=210 [2022-02-23 19:28:40,138 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 19:28:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:40,227 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-02-23 19:28:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:28:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-02-23 19:28:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:40,231 INFO L225 Difference]: With dead ends: 48 [2022-02-23 19:28:40,231 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 19:28:40,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=67, Invalid=236, Unknown=3, NotChecked=0, Total=306 [2022-02-23 19:28:40,232 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:40,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 19:28:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-23 19:28:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-02-23 19:28:40,235 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2022-02-23 19:28:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:40,237 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-02-23 19:28:40,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 19:28:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-02-23 19:28:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:28:40,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:40,238 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:40,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 19:28:40,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:40,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2022-02-23 19:28:40,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:40,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671790339] [2022-02-23 19:28:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:40,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:40,446 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:40,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339404966] [2022-02-23 19:28:40,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:28:40,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:40,448 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) [2022-02-23 19:28:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 19:28:40,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:28:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 19:28:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 19:28:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:40,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:40,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671790339] [2022-02-23 19:28:40,741 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:40,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339404966] [2022-02-23 19:28:40,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339404966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:40,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:40,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 19:28:40,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834774107] [2022-02-23 19:28:40,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:40,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:28:40,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:28:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:28:40,742 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:28:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:40,790 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-02-23 19:28:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 19:28:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-02-23 19:28:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:40,791 INFO L225 Difference]: With dead ends: 48 [2022-02-23 19:28:40,791 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 19:28:40,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:28:40,791 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:40,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 19:28:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-23 19:28:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-02-23 19:28:40,794 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-02-23 19:28:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-02-23 19:28:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:28:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-02-23 19:28:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 19:28:40,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:40,797 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:40,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:41,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:41,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2022-02-23 19:28:41,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:41,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389187624] [2022-02-23 19:28:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:41,049 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:41,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909012671] [2022-02-23 19:28:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:28:41,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:41,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:41,054 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) [2022-02-23 19:28:41,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 19:28:41,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 19:28:41,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 19:28:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 19:28:41,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:41,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:41,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389187624] [2022-02-23 19:28:41,418 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:41,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909012671] [2022-02-23 19:28:41,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909012671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:41,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:41,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 19:28:41,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270168087] [2022-02-23 19:28:41,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:41,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 19:28:41,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:41,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 19:28:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:28:41,419 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:41,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:41,479 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-02-23 19:28:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:28:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2022-02-23 19:28:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:41,480 INFO L225 Difference]: With dead ends: 50 [2022-02-23 19:28:41,480 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 19:28:41,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:28:41,481 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 19:28:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-23 19:28:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:28:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-02-23 19:28:41,484 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2022-02-23 19:28:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-02-23 19:28:41,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-02-23 19:28:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 19:28:41,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:41,485 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:41,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:41,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:41,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 2 times [2022-02-23 19:28:41,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:41,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476175194] [2022-02-23 19:28:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:41,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:41,692 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:41,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509047087] [2022-02-23 19:28:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:28:41,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:41,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:41,701 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) [2022-02-23 19:28:41,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 19:28:41,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:28:41,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:41,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 19:28:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 19:28:41,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:41,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476175194] [2022-02-23 19:28:41,983 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:41,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509047087] [2022-02-23 19:28:41,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509047087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:28:41,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:28:41,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 19:28:41,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691283978] [2022-02-23 19:28:41,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:41,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 19:28:41,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:41,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 19:28:41,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:28:41,986 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 19:28:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:42,142 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-02-23 19:28:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 19:28:42,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 44 [2022-02-23 19:28:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:42,144 INFO L225 Difference]: With dead ends: 118 [2022-02-23 19:28:42,144 INFO L226 Difference]: Without dead ends: 118 [2022-02-23 19:28:42,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 19:28:42,146 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:42,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 114 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-23 19:28:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-02-23 19:28:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-02-23 19:28:42,163 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 44 [2022-02-23 19:28:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:42,163 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-02-23 19:28:42,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 19:28:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-02-23 19:28:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 19:28:42,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:42,164 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:42,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 19:28:42,365 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2022-02-23 19:28:42,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:42,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489956818] [2022-02-23 19:28:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:42,371 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:42,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811376533] [2022-02-23 19:28:42,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:28:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:42,379 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) [2022-02-23 19:28:42,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 19:28:42,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:28:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 19:28:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 19:28:42,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:42,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:42,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489956818] [2022-02-23 19:28:42,761 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:42,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811376533] [2022-02-23 19:28:42,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811376533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:42,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:42,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 19:28:42,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763931777] [2022-02-23 19:28:42,762 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:42,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 19:28:42,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 19:28:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:28:42,762 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:28:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:42,842 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-02-23 19:28:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 19:28:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-02-23 19:28:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:42,843 INFO L225 Difference]: With dead ends: 96 [2022-02-23 19:28:42,843 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 19:28:42,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:28:42,844 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:42,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 250 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 19:28:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 19:28:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-02-23 19:28:42,861 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 50 [2022-02-23 19:28:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:42,861 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-02-23 19:28:42,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:28:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-02-23 19:28:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 19:28:42,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:42,862 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:42,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:43,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 19:28:43,071 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2022-02-23 19:28:43,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:43,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810946153] [2022-02-23 19:28:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:43,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:43,078 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:43,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306717277] [2022-02-23 19:28:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:28:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:43,079 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) [2022-02-23 19:28:43,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 19:28:43,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-23 19:28:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 19:28:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 19:28:43,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:43,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:43,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810946153] [2022-02-23 19:28:43,699 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:43,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306717277] [2022-02-23 19:28:43,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306717277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:43,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:43,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 19:28:43,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496890819] [2022-02-23 19:28:43,699 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:43,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 19:28:43,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 19:28:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:28:43,700 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:28:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:43,798 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-02-23 19:28:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 19:28:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2022-02-23 19:28:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:43,799 INFO L225 Difference]: With dead ends: 96 [2022-02-23 19:28:43,799 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 19:28:43,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-23 19:28:43,799 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:43,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 19:28:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 19:28:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-02-23 19:28:43,802 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 58 [2022-02-23 19:28:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:43,803 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-02-23 19:28:43,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:28:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-02-23 19:28:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-23 19:28:43,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:43,804 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:43,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 19:28:44,004 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2022-02-23 19:28:44,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:44,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933677265] [2022-02-23 19:28:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:44,010 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:44,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466127438] [2022-02-23 19:28:44,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:28:44,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:44,011 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) [2022-02-23 19:28:44,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 19:28:44,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 19:28:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-23 19:28:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 19:28:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:44,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:44,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933677265] [2022-02-23 19:28:44,695 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:44,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466127438] [2022-02-23 19:28:44,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466127438] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:44,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:44,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 19:28:44,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087365329] [2022-02-23 19:28:44,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:44,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 19:28:44,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 19:28:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:28:44,697 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:28:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:44,815 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-02-23 19:28:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 19:28:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2022-02-23 19:28:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:44,816 INFO L225 Difference]: With dead ends: 96 [2022-02-23 19:28:44,816 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 19:28:44,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:28:44,817 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:44,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 372 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 19:28:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 19:28:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-02-23 19:28:44,820 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 66 [2022-02-23 19:28:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:44,820 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-02-23 19:28:44,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:28:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-02-23 19:28:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 19:28:44,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:44,821 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:44,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:45,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 19:28:45,022 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2022-02-23 19:28:45,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:45,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129281022] [2022-02-23 19:28:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:45,029 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:45,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016233961] [2022-02-23 19:28:45,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:28:45,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:45,030 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) [2022-02-23 19:28:45,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 19:28:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 19:28:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 19:28:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:46,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:46,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129281022] [2022-02-23 19:28:46,353 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:46,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016233961] [2022-02-23 19:28:46,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016233961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:46,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:46,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 19:28:46,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003573478] [2022-02-23 19:28:46,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:46,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 19:28:46,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 19:28:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-23 19:28:46,354 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 19:28:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:46,508 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-02-23 19:28:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 19:28:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2022-02-23 19:28:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:46,510 INFO L225 Difference]: With dead ends: 96 [2022-02-23 19:28:46,510 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 19:28:46,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-23 19:28:46,510 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:46,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 442 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 19:28:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 19:28:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-02-23 19:28:46,513 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 74 [2022-02-23 19:28:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-02-23 19:28:46,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 19:28:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-02-23 19:28:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-23 19:28:46,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:46,514 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:46,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:46,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 19:28:46,715 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2022-02-23 19:28:46,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:46,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811864696] [2022-02-23 19:28:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:46,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:46,721 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:46,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037630280] [2022-02-23 19:28:46,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:28:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:46,734 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) [2022-02-23 19:28:46,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 19:28:47,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:28:47,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-23 19:28:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-23 19:28:47,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:47,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:47,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811864696] [2022-02-23 19:28:47,693 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:47,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037630280] [2022-02-23 19:28:47,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037630280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:47,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:47,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-23 19:28:47,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176063670] [2022-02-23 19:28:47,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:47,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 19:28:47,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 19:28:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:28:47,694 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 19:28:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:47,852 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-02-23 19:28:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 19:28:47,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2022-02-23 19:28:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:47,853 INFO L225 Difference]: With dead ends: 96 [2022-02-23 19:28:47,853 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 19:28:47,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-23 19:28:47,854 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:47,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:28:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 19:28:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 19:28:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-02-23 19:28:47,856 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2022-02-23 19:28:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:47,856 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-02-23 19:28:47,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 19:28:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-02-23 19:28:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-23 19:28:47,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:47,857 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:47,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 19:28:48,058 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2022-02-23 19:28:48,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:48,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993841061] [2022-02-23 19:28:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:48,064 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:48,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312928462] [2022-02-23 19:28:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:28:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:48,070 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) [2022-02-23 19:28:48,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 19:28:48,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-23 19:28:48,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-23 19:28:48,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-02-23 19:28:49,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:53,254 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 13) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 .cse3 (- 4)) (- 4)))) (not (= (mod (+ .cse1 .cse2 .cse3) 4) 0)))) is different from false [2022-02-23 19:28:57,313 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-02-23 19:28:57,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993841061] [2022-02-23 19:28:57,315 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312928462] [2022-02-23 19:28:57,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312928462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:57,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:57,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-02-23 19:28:57,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653405465] [2022-02-23 19:28:57,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:57,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 19:28:57,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 19:28:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=446, Unknown=2, NotChecked=86, Total=600 [2022-02-23 19:28:57,317 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:57,549 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-02-23 19:28:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 19:28:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2022-02-23 19:28:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:57,550 INFO L225 Difference]: With dead ends: 98 [2022-02-23 19:28:57,550 INFO L226 Difference]: Without dead ends: 95 [2022-02-23 19:28:57,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=87, Invalid=569, Unknown=2, NotChecked=98, Total=756 [2022-02-23 19:28:57,551 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:57,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 559 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:28:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-23 19:28:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-23 19:28:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 19:28:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-02-23 19:28:57,555 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-02-23 19:28:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:57,556 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-02-23 19:28:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:28:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-02-23 19:28:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-23 19:28:57,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:57,556 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:57,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:57,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:57,757 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 3 times [2022-02-23 19:28:57,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:57,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92909376] [2022-02-23 19:28:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:57,763 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:57,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136844826] [2022-02-23 19:28:57,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:28:57,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:57,767 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) [2022-02-23 19:28:57,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 19:28:57,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 19:28:57,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 19:28:57,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:28:58,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 19:28:58,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:58,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92909376] [2022-02-23 19:28:58,304 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:58,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136844826] [2022-02-23 19:28:58,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136844826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:28:58,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:28:58,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 19:28:58,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012600282] [2022-02-23 19:28:58,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:58,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 19:28:58,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 19:28:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 19:28:58,307 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-02-23 19:28:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:58,681 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2022-02-23 19:28:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 19:28:58,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 92 [2022-02-23 19:28:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:58,682 INFO L225 Difference]: With dead ends: 244 [2022-02-23 19:28:58,682 INFO L226 Difference]: Without dead ends: 244 [2022-02-23 19:28:58,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 19:28:58,683 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 286 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:58,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 213 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:28:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-23 19:28:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 189. [2022-02-23 19:28:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0928571428571427) internal successors, (153), 140 states have internal predecessors, (153), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:28:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2022-02-23 19:28:58,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 92 [2022-02-23 19:28:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:58,688 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2022-02-23 19:28:58,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-02-23 19:28:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2022-02-23 19:28:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-23 19:28:58,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:58,688 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:58,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:58,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 19:28:58,889 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2022-02-23 19:28:58,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:58,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312100513] [2022-02-23 19:28:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:58,896 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:58,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958635629] [2022-02-23 19:28:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:28:58,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:58,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:58,897 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) [2022-02-23 19:28:58,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 19:29:00,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:29:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-23 19:29:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 19:29:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:00,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:00,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312100513] [2022-02-23 19:29:00,621 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:00,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958635629] [2022-02-23 19:29:00,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958635629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:00,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:00,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-23 19:29:00,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40685046] [2022-02-23 19:29:00,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:00,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 19:29:00,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 19:29:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-23 19:29:00,622 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 19:29:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:00,817 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2022-02-23 19:29:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 19:29:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2022-02-23 19:29:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:00,819 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:00,819 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:00,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-23 19:29:00,819 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:00,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 688 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:29:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 140 states have internal predecessors, (152), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2022-02-23 19:29:00,823 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 98 [2022-02-23 19:29:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:00,823 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2022-02-23 19:29:00,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 19:29:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2022-02-23 19:29:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-23 19:29:00,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:00,824 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:00,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:01,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 19:29:01,026 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2022-02-23 19:29:01,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:01,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491427108] [2022-02-23 19:29:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:01,034 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:01,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452865209] [2022-02-23 19:29:01,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:29:01,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:01,035 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) [2022-02-23 19:29:01,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 19:29:01,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-23 19:29:01,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-23 19:29:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-23 19:29:01,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:02,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:02,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491427108] [2022-02-23 19:29:02,084 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:02,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452865209] [2022-02-23 19:29:02,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452865209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:02,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:02,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-02-23 19:29:02,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288470945] [2022-02-23 19:29:02,084 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:02,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 19:29:02,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 19:29:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-23 19:29:02,085 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 19:29:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:02,326 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2022-02-23 19:29:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 19:29:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2022-02-23 19:29:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:02,327 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:02,327 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:02,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-23 19:29:02,328 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:02,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 782 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:29:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 140 states have internal predecessors, (151), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2022-02-23 19:29:02,331 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 106 [2022-02-23 19:29:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:02,332 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2022-02-23 19:29:02,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 19:29:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2022-02-23 19:29:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-23 19:29:02,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:02,333 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:02,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-23 19:29:02,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 19:29:02,537 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2022-02-23 19:29:02,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:02,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980156899] [2022-02-23 19:29:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:02,544 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:02,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883424162] [2022-02-23 19:29:02,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:29:02,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:02,547 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) [2022-02-23 19:29:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 19:29:03,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-23 19:29:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2022-02-23 19:29:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 19:29:03,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:03,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:03,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980156899] [2022-02-23 19:29:03,536 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:03,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883424162] [2022-02-23 19:29:03,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883424162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:03,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:03,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-02-23 19:29:03,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234543487] [2022-02-23 19:29:03,536 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 19:29:03,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 19:29:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-23 19:29:03,537 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 19:29:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:03,780 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2022-02-23 19:29:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 19:29:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2022-02-23 19:29:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:03,781 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:03,781 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:03,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-02-23 19:29:03,781 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:03,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 882 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:29:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0714285714285714) internal successors, (150), 140 states have internal predecessors, (150), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 198 transitions. [2022-02-23 19:29:03,785 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 198 transitions. Word has length 114 [2022-02-23 19:29:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 198 transitions. [2022-02-23 19:29:03,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 19:29:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 198 transitions. [2022-02-23 19:29:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-23 19:29:03,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:03,786 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:03,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:03,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:03,991 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2022-02-23 19:29:03,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:03,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487368117] [2022-02-23 19:29:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:04,002 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:04,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649939041] [2022-02-23 19:29:04,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:29:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:04,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:04,004 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) [2022-02-23 19:29:04,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 19:29:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:29:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-23 19:29:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-02-23 19:29:05,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:09,715 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-02-23 19:29:11,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:11,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487368117] [2022-02-23 19:29:11,739 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:11,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649939041] [2022-02-23 19:29:11,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649939041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:11,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:11,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-02-23 19:29:11,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705899231] [2022-02-23 19:29:11,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:11,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 19:29:11,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:11,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 19:29:11,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=539, Unknown=1, NotChecked=46, Total=650 [2022-02-23 19:29:11,740 INFO L87 Difference]: Start difference. First operand 189 states and 198 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 19:29:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:12,111 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2022-02-23 19:29:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 19:29:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2022-02-23 19:29:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:12,113 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:12,113 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2022-02-23 19:29:12,113 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 965 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:29:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0642857142857143) internal successors, (149), 140 states have internal predecessors, (149), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2022-02-23 19:29:12,131 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 122 [2022-02-23 19:29:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2022-02-23 19:29:12,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 19:29:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2022-02-23 19:29:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-23 19:29:12,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:12,133 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:12,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:12,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:12,339 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2022-02-23 19:29:12,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:12,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486648677] [2022-02-23 19:29:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:12,361 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:12,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412707216] [2022-02-23 19:29:12,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:29:12,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:12,363 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) [2022-02-23 19:29:12,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 19:29:13,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:29:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-23 19:29:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-23 19:29:13,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:13,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:13,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486648677] [2022-02-23 19:29:13,807 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:13,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412707216] [2022-02-23 19:29:13,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412707216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:13,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:13,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-02-23 19:29:13,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936244180] [2022-02-23 19:29:13,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:13,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 19:29:13,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 19:29:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-23 19:29:13,809 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 19:29:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:14,124 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2022-02-23 19:29:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 19:29:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2022-02-23 19:29:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:14,125 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:14,125 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:14,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-23 19:29:14,126 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:14,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1100 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:29:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 140 states have internal predecessors, (148), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2022-02-23 19:29:14,129 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 130 [2022-02-23 19:29:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2022-02-23 19:29:14,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 19:29:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2022-02-23 19:29:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 19:29:14,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:14,130 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:14,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:14,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 19:29:14,336 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2022-02-23 19:29:14,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:14,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676087242] [2022-02-23 19:29:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:14,360 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:14,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178159650] [2022-02-23 19:29:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:29:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:14,361 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) [2022-02-23 19:29:14,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 19:29:14,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-23 19:29:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-23 19:29:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 19:29:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:15,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:15,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676087242] [2022-02-23 19:29:15,548 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:15,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178159650] [2022-02-23 19:29:15,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178159650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:15,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:15,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-02-23 19:29:15,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793323171] [2022-02-23 19:29:15,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 19:29:15,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 19:29:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-23 19:29:15,549 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 19:29:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:15,898 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2022-02-23 19:29:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 19:29:15,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2022-02-23 19:29:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:15,899 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:15,899 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:15,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-23 19:29:15,900 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:15,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1218 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:29:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2022-02-23 19:29:15,919 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 138 [2022-02-23 19:29:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:15,919 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2022-02-23 19:29:15,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 19:29:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2022-02-23 19:29:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-23 19:29:15,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:15,920 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:15,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 19:29:16,128 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2022-02-23 19:29:16,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:16,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573500834] [2022-02-23 19:29:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:16,134 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:16,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410150294] [2022-02-23 19:29:16,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:29:16,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:16,141 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) [2022-02-23 19:29:16,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 19:29:17,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:29:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 72 conjunts are in the unsatisfiable core [2022-02-23 19:29:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-23 19:29:17,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:17,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:17,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573500834] [2022-02-23 19:29:17,730 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:17,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410150294] [2022-02-23 19:29:17,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410150294] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:17,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:17,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-02-23 19:29:17,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553247679] [2022-02-23 19:29:17,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:17,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 19:29:17,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 19:29:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-23 19:29:17,731 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 19:29:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:18,138 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-02-23 19:29:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 19:29:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2022-02-23 19:29:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:18,139 INFO L225 Difference]: With dead ends: 192 [2022-02-23 19:29:18,139 INFO L226 Difference]: Without dead ends: 189 [2022-02-23 19:29:18,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-23 19:29:18,140 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:18,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1342 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 19:29:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-23 19:29:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-23 19:29:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:29:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2022-02-23 19:29:18,143 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 146 [2022-02-23 19:29:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:18,143 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2022-02-23 19:29:18,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 19:29:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2022-02-23 19:29:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-23 19:29:18,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:18,144 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:18,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:18,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:18,345 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 75778898, now seen corresponding path program 17 times [2022-02-23 19:29:18,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:18,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896679035] [2022-02-23 19:29:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:18,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:18,351 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:18,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873897101] [2022-02-23 19:29:18,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:29:18,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:18,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:18,353 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) [2022-02-23 19:29:18,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process