/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:28:55,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:28:55,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:28:55,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 19:28:55,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 19:28:55,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 19:28:55,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 19:28:55,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 19:28:55,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 19:28:55,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 19:28:55,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 19:28:55,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 19:28:55,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:28:55,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:28:55,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:28:55,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:28:55,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:28:55,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:28:55,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:28:55,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:28:55,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:28:55,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:28:55,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:28:55,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:28:55,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 19:28:55,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:28:55,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:28:55,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:28:55,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:28:55,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:28:55,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:28:55,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:28:55,453 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:28:55,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:28:55,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:28:55,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:28:55,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:28:55,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:28:55,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:28:55,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:28:55,456 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:28:55,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:28:55,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:28:55,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:28:55,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:28:55,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:28:55,665 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:28:55,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-02-23 19:28:55,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91451c98/6bc565d27e1349f6bd990a856b743f71/FLAG9d4c40394 [2022-02-23 19:28:56,058 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:28:56,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-02-23 19:28:56,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91451c98/6bc565d27e1349f6bd990a856b743f71/FLAG9d4c40394 [2022-02-23 19:28:56,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91451c98/6bc565d27e1349f6bd990a856b743f71 [2022-02-23 19:28:56,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:28:56,493 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:28:56,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:28:56,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:28:56,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:28:56,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12323cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56, skipping insertion in model container [2022-02-23 19:28:56,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:28:56,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:28:56,654 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_valuebound100.c[458,471] [2022-02-23 19:28:56,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:28:56,669 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:28:56,679 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_valuebound100.c[458,471] [2022-02-23 19:28:56,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:28:56,703 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:28:56,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56 WrapperNode [2022-02-23 19:28:56,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:28:56,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:28:56,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:28:56,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:28:56,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:28:56,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:28:56,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:28:56,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:28:56,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:28:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:56,760 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 19:28:56,767 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 19:28:56,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:28:56,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:28:56,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:28:56,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:28:56,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:28:56,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:28:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:28:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:28:56,851 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:28:56,852 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:28:56,946 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:28:56,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:28:56,950 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:28:56,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:56 BoogieIcfgContainer [2022-02-23 19:28:56,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:28:56,952 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:28:56,952 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:28:56,953 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:28:56,955 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:56" (1/1) ... [2022-02-23 19:28:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:28:56 BasicIcfg [2022-02-23 19:28:56,968 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:28:56,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:28:56,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:28:56,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:28:56,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:28:56" (1/4) ... [2022-02-23 19:28:56,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77189a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:28:56, skipping insertion in model container [2022-02-23 19:28:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:28:56" (2/4) ... [2022-02-23 19:28:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77189a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:28:56, skipping insertion in model container [2022-02-23 19:28:56,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:28:56" (3/4) ... [2022-02-23 19:28:56,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77189a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:28:56, skipping insertion in model container [2022-02-23 19:28:56,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:28:56" (4/4) ... [2022-02-23 19:28:56,992 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.cJordan [2022-02-23 19:28:56,996 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:28:56,996 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:28:57,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:28:57,076 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 19:28:57,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:28:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:28:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 19:28:57,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:57,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:57,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-02-23 19:28:57,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:57,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919781779] [2022-02-23 19:28:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:57,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:28:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:57,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 19:28:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:57,275 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 19:28:57,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:57,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919781779] [2022-02-23 19:28:57,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919781779] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:28:57,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:28:57,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:28:57,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365657990] [2022-02-23 19:28:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:57,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:28:57,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:28:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:28:57,310 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:28:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:57,362 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-02-23 19:28:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:28:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 19:28:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:57,373 INFO L225 Difference]: With dead ends: 28 [2022-02-23 19:28:57,373 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 19:28:57,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 19:28:57,378 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:57,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 19:28:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-23 19:28:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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 19:28:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-02-23 19:28:57,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-02-23 19:28:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:57,407 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-02-23 19:28:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:28:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-02-23 19:28:57,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 19:28:57,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:57,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:57,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:28:57,410 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-02-23 19:28:57,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:57,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278648314] [2022-02-23 19:28:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:57,444 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:57,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033865698] [2022-02-23 19:28:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:57,456 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 19:28:57,491 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 19:28:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:28:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:57,641 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 19:28:57,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:28:57,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:57,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278648314] [2022-02-23 19:28:57,642 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:57,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033865698] [2022-02-23 19:28:57,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033865698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:28:57,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:28:57,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:28:57,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993175732] [2022-02-23 19:28:57,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:57,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:28:57,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:28:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:28:57,646 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:28:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:57,683 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-02-23 19:28:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:28:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 19:28:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:57,685 INFO L225 Difference]: With dead ends: 32 [2022-02-23 19:28:57,685 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 19:28:57,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 19:28:57,686 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:57,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 19:28:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-23 19:28:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-23 19:28:57,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-02-23 19:28:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:57,692 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-23 19:28:57,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:28:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-23 19:28:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:28:57,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:57,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:57,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:57,908 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 19:28:57,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-02-23 19:28:57,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:57,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890114319] [2022-02-23 19:28:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:57,918 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:57,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476901420] [2022-02-23 19:28:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:57,919 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 19:28:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:57,962 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 19:28:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 19:28:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:58,072 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 19:28:58,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 19:28:58,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:58,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890114319] [2022-02-23 19:28:58,432 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:58,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476901420] [2022-02-23 19:28:58,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476901420] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:58,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:58,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 19:28:58,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688035017] [2022-02-23 19:28:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:28:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:28:58,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:28:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 19:28:58,434 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:28:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:58,457 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-02-23 19:28:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:28:58,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-23 19:28:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:58,458 INFO L225 Difference]: With dead ends: 34 [2022-02-23 19:28:58,458 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 19:28:58,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:28:58,459 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:58,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 19:28:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-23 19:28:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:28:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-23 19:28:58,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-02-23 19:28:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:58,462 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-23 19:28:58,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:28:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-23 19:28:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:28:58,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:58,463 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:58,495 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 19:28:58,664 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 19:28:58,664 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-02-23 19:28:58,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:58,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625562345] [2022-02-23 19:28:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:58,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:58,675 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:58,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118274820] [2022-02-23 19:28:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:58,677 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 19:28:58,678 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 19:28:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:28:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 19:28:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:28:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:59,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:59,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625562345] [2022-02-23 19:28:59,019 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:59,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118274820] [2022-02-23 19:28:59,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118274820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:59,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:59,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 19:28:59,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927091610] [2022-02-23 19:28:59,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:59,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 19:28:59,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 19:28:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 19:28:59,020 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:28:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:59,072 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-02-23 19:28:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 19:28:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-02-23 19:28:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:59,073 INFO L225 Difference]: With dead ends: 37 [2022-02-23 19:28:59,073 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 19:28:59,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:28:59,074 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:59,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 19:28:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-23 19:28:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:28:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-02-23 19:28:59,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-02-23 19:28:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:59,078 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-02-23 19:28:59,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:28:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-02-23 19:28:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 19:28:59,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:59,079 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:59,117 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 19:28:59,326 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 19:28:59,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-02-23 19:28:59,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:59,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144320498] [2022-02-23 19:28:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:59,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:59,334 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:59,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775830101] [2022-02-23 19:28:59,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:28:59,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:59,335 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 19:28:59,336 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 19:28:59,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:28:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:28:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 19:28:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:28:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 19:28:59,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:28:59,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:28:59,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144320498] [2022-02-23 19:28:59,676 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:28:59,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775830101] [2022-02-23 19:28:59,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775830101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:28:59,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:28:59,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 19:28:59,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192142393] [2022-02-23 19:28:59,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:28:59,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:28:59,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:28:59,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:28:59,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:28:59,679 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 19:28:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:28:59,736 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-02-23 19:28:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 19:28:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-02-23 19:28:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:28:59,737 INFO L225 Difference]: With dead ends: 40 [2022-02-23 19:28:59,737 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 19:28:59,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 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 19:28:59,738 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:28:59,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:28:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 19:28:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 19:28:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:28:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-02-23 19:28:59,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-02-23 19:28:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:28:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-02-23 19:28:59,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 19:28:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-02-23 19:28:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 19:28:59,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:28:59,742 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:28:59,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 19:28:59,943 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 19:28:59,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:28:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:28:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-02-23 19:28:59,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:28:59,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510140559] [2022-02-23 19:28:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:28:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:28:59,951 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:28:59,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707712135] [2022-02-23 19:28:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:28:59,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:28:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:28:59,955 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 19:28:59,967 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 19:29:00,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 19:29:00,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:00,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 19:29:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 19:29:00,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:00,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:00,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510140559] [2022-02-23 19:29:00,365 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:00,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707712135] [2022-02-23 19:29:00,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707712135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:00,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:00,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 19:29:00,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670085350] [2022-02-23 19:29:00,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:00,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 19:29:00,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 19:29:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:29:00,367 INFO L87 Difference]: Start difference. First operand 37 states and 39 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 19:29:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:00,430 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-02-23 19:29:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:29:00,430 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-02-23 19:29:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:00,431 INFO L225 Difference]: With dead ends: 43 [2022-02-23 19:29:00,431 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 19:29:00,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 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 19:29:00,432 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:00,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:29:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 19:29:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-23 19:29:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:29:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-02-23 19:29:00,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-02-23 19:29:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:00,436 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-02-23 19:29:00,436 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 19:29:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-02-23 19:29:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-23 19:29:00,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:00,437 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:00,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 19:29:00,641 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 19:29:00,642 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-02-23 19:29:00,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:00,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433441428] [2022-02-23 19:29:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:00,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:00,649 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:00,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413162597] [2022-02-23 19:29:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:29:00,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:00,650 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 19:29:00,672 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 19:29:00,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:29:00,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 19:29:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 19:29:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:01,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:01,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433441428] [2022-02-23 19:29:01,207 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:01,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413162597] [2022-02-23 19:29:01,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413162597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:01,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:01,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 19:29:01,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150874878] [2022-02-23 19:29:01,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 19:29:01,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 19:29:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:29:01,208 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-23 19:29:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:01,286 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-02-23 19:29:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 19:29:01,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-02-23 19:29:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:01,287 INFO L225 Difference]: With dead ends: 46 [2022-02-23 19:29:01,287 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 19:29:01,288 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 19:29:01,288 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:01,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 19:29:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-23 19:29:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:29:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-02-23 19:29:01,291 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-02-23 19:29:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:01,292 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-02-23 19:29:01,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-23 19:29:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-02-23 19:29:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 19:29:01,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:01,293 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:01,311 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 19:29:01,493 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 19:29:01,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-02-23 19:29:01,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:01,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216031133] [2022-02-23 19:29:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:01,500 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:01,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823761749] [2022-02-23 19:29:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:29:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:01,503 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 19:29:01,524 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 19:29:01,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-23 19:29:01,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 19:29:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 19:29:01,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:01,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:01,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216031133] [2022-02-23 19:29:01,914 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:01,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823761749] [2022-02-23 19:29:01,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823761749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:01,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:01,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 19:29:01,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603467083] [2022-02-23 19:29:01,915 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:01,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 19:29:01,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 19:29:01,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:29:01,916 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 19:29:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:02,034 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-02-23 19:29:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 19:29:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-02-23 19:29:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:02,035 INFO L225 Difference]: With dead ends: 49 [2022-02-23 19:29:02,035 INFO L226 Difference]: Without dead ends: 46 [2022-02-23 19:29:02,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-23 19:29:02,036 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:02,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-23 19:29:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-23 19:29:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 19:29:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-02-23 19:29:02,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-02-23 19:29:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:02,040 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-02-23 19:29:02,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 19:29:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-02-23 19:29:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-23 19:29:02,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:02,041 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:02,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 19:29:02,247 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 19:29:02,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-02-23 19:29:02,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:02,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163607684] [2022-02-23 19:29:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:02,255 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:02,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642741100] [2022-02-23 19:29:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:29:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:02,256 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 19:29:02,257 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 19:29:02,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 19:29:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-23 19:29:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 19:29:02,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:02,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:02,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163607684] [2022-02-23 19:29:02,745 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:02,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642741100] [2022-02-23 19:29:02,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642741100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:02,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:02,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 19:29:02,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186658129] [2022-02-23 19:29:02,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 19:29:02,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 19:29:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:29:02,747 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-02-23 19:29:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:02,853 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-02-23 19:29:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 19:29:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-02-23 19:29:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:02,854 INFO L225 Difference]: With dead ends: 52 [2022-02-23 19:29:02,854 INFO L226 Difference]: Without dead ends: 49 [2022-02-23 19:29:02,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 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 19:29:02,855 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:02,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-23 19:29:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-23 19:29:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 19:29:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-02-23 19:29:02,859 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-02-23 19:29:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:02,859 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-02-23 19:29:02,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-02-23 19:29:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-02-23 19:29:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-23 19:29:02,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:02,860 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:02,874 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 19:29:03,060 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 19:29:03,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-02-23 19:29:03,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:03,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452763781] [2022-02-23 19:29:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:03,069 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:03,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975944903] [2022-02-23 19:29:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:29:03,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:03,077 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 19:29:03,078 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 19:29:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:29:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 19:29:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 19:29:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:03,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452763781] [2022-02-23 19:29:03,803 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975944903] [2022-02-23 19:29:03,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975944903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:03,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:03,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 19:29:03,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232721149] [2022-02-23 19:29:03,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:03,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 19:29:03,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 19:29:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-23 19:29:03,804 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 19:29:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:03,931 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-02-23 19:29:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 19:29:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-02-23 19:29:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:03,932 INFO L225 Difference]: With dead ends: 55 [2022-02-23 19:29:03,932 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 19:29:03,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-23 19:29:03,933 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:03,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 19:29:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-23 19:29:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:29:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-02-23 19:29:03,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-02-23 19:29:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:03,937 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-02-23 19:29:03,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 19:29:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-02-23 19:29:03,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-23 19:29:03,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:03,938 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:03,943 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 19:29:04,140 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 19:29:04,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-02-23 19:29:04,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:04,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073127817] [2022-02-23 19:29:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:04,147 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:04,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255005683] [2022-02-23 19:29:04,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:29:04,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:04,149 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 19:29:04,179 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 19:29:04,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:29:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-23 19:29:04,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-23 19:29:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:05,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:05,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073127817] [2022-02-23 19:29:05,108 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:05,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255005683] [2022-02-23 19:29:05,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255005683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:05,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:05,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-23 19:29:05,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530107169] [2022-02-23 19:29:05,109 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:05,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 19:29:05,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 19:29:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:29:05,111 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-02-23 19:29:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:05,265 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-02-23 19:29:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 19:29:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-02-23 19:29:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:05,266 INFO L225 Difference]: With dead ends: 58 [2022-02-23 19:29:05,266 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 19:29:05,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 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 19:29:05,267 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:05,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 19:29:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 19:29:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 19:29:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-02-23 19:29:05,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-02-23 19:29:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:05,271 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-02-23 19:29:05,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-02-23 19:29:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-02-23 19:29:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-23 19:29:05,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:05,272 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:05,279 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 19:29:05,477 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 19:29:05,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-02-23 19:29:05,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:05,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511412070] [2022-02-23 19:29:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:05,485 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:05,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178884139] [2022-02-23 19:29:05,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:29:05,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:05,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:05,487 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 19:29:05,491 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 19:29:05,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-23 19:29:05,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-23 19:29:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 19:29:06,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:06,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:06,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511412070] [2022-02-23 19:29:06,390 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:06,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178884139] [2022-02-23 19:29:06,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178884139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:06,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:06,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-23 19:29:06,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494548737] [2022-02-23 19:29:06,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:06,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 19:29:06,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 19:29:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-23 19:29:06,391 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 19:29:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:06,565 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-02-23 19:29:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 19:29:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-02-23 19:29:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:06,566 INFO L225 Difference]: With dead ends: 61 [2022-02-23 19:29:06,566 INFO L226 Difference]: Without dead ends: 58 [2022-02-23 19:29:06,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-23 19:29:06,567 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:06,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:29:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-23 19:29:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-23 19:29:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 19:29:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-02-23 19:29:06,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-02-23 19:29:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:06,571 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-02-23 19:29:06,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 19:29:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-02-23 19:29:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-23 19:29:06,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:06,572 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:06,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 19:29:06,776 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 19:29:06,776 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-02-23 19:29:06,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:06,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679566950] [2022-02-23 19:29:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:06,784 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:06,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444928754] [2022-02-23 19:29:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:29:06,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:06,802 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 19:29:06,803 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 19:29:07,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:29:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-23 19:29:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 19:29:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:07,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:07,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679566950] [2022-02-23 19:29:07,797 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:07,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444928754] [2022-02-23 19:29:07,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444928754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:07,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:07,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-23 19:29:07,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915708806] [2022-02-23 19:29:07,814 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 19:29:07,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 19:29:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-23 19:29:07,816 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-02-23 19:29:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:08,019 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-02-23 19:29:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 19:29:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-02-23 19:29:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:08,020 INFO L225 Difference]: With dead ends: 64 [2022-02-23 19:29:08,020 INFO L226 Difference]: Without dead ends: 61 [2022-02-23 19:29:08,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 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 19:29:08,020 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:08,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:29:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-23 19:29:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-23 19:29:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 19:29:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-02-23 19:29:08,024 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-02-23 19:29:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:08,024 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-02-23 19:29:08,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-02-23 19:29:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-02-23 19:29:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-23 19:29:08,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:08,025 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:08,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-23 19:29:08,231 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 19:29:08,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-02-23 19:29:08,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:08,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681944608] [2022-02-23 19:29:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:08,239 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:08,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268983910] [2022-02-23 19:29:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:29:08,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:08,256 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 19:29:08,257 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 19:29:08,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-23 19:29:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-23 19:29:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-23 19:29:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:09,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:29:09,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681944608] [2022-02-23 19:29:09,946 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:29:09,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268983910] [2022-02-23 19:29:09,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268983910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:29:09,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:29:09,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-02-23 19:29:09,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248126282] [2022-02-23 19:29:09,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:29:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 19:29:09,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:29:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 19:29:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-02-23 19:29:09,947 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-23 19:29:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:29:10,181 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-02-23 19:29:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 19:29:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-02-23 19:29:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:29:10,182 INFO L225 Difference]: With dead ends: 67 [2022-02-23 19:29:10,182 INFO L226 Difference]: Without dead ends: 64 [2022-02-23 19:29:10,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-02-23 19:29:10,183 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:29:10,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 19:29:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-23 19:29:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-23 19:29:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 19:29:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-02-23 19:29:10,186 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-02-23 19:29:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:29:10,187 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-02-23 19:29:10,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-23 19:29:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-02-23 19:29:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 19:29:10,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:29:10,188 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:29:10,192 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 19:29:10,388 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 19:29:10,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:29:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:29:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-02-23 19:29:10,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:29:10,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208683362] [2022-02-23 19:29:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:29:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:29:10,395 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:29:10,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760637587] [2022-02-23 19:29:10,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:29:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:29:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:29:10,396 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 19:29:10,425 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 19:29:10,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-23 19:29:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:29:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-23 19:29:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:29:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-02-23 19:29:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:29:15,777 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 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .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 4 .cse3) 4))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-02-23 19:29:19,822 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 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))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-02-23 19:29:25,859 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 1)) (not (= (mod (+ (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 .cse0) (* 13 .cse0 .cse0)) 4) 0)))) is different from false [2022-02-23 19:30:08,136 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 c_main_~y~0))) (or (not (= (mod (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0)) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 9 (* .cse0 .cse0))) (<= c_main_~k~0 (+ c_main_~c~0 4)) (< (+ 5 c_main_~c~0) c_main_~k~0))) is different from false [2022-02-23 19:30:54,002 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-02-23 19:30:56,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:30:56,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208683362] [2022-02-23 19:30:56,022 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:30:56,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760637587] [2022-02-23 19:30:56,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760637587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:30:56,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:30:56,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-02-23 19:30:56,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122531584] [2022-02-23 19:30:56,023 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:30:56,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 19:30:56,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:30:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 19:30:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=695, Unknown=12, NotChecked=290, Total=1122 [2022-02-23 19:30:56,024 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 19:31:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:31:00,401 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-02-23 19:31:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 19:31:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-02-23 19:31:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:31:00,402 INFO L225 Difference]: With dead ends: 70 [2022-02-23 19:31:00,402 INFO L226 Difference]: Without dead ends: 67 [2022-02-23 19:31:00,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=146, Invalid=852, Unknown=14, NotChecked=320, Total=1332 [2022-02-23 19:31:00,403 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:31:00,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:31:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-23 19:31:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-23 19:31:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 19:31:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-02-23 19:31:00,406 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-02-23 19:31:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:31:00,407 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-02-23 19:31:00,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 19:31:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-02-23 19:31:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-23 19:31:00,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:31:00,407 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:31:00,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-23 19:31:00,611 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 19:31:00,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:31:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:31:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-02-23 19:31:00,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:31:00,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386431664] [2022-02-23 19:31:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:31:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:31:00,618 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:31:00,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860902518] [2022-02-23 19:31:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:31:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:31:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:31:00,620 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 19:31:00,620 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 19:31:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:31:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-02-23 19:31:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:31:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-02-23 19:31:01,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:33:13,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:33:13,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386431664] [2022-02-23 19:33:13,544 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:33:13,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860902518] [2022-02-23 19:33:13,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860902518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:33:13,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:33:13,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-02-23 19:33:13,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719757061] [2022-02-23 19:33:13,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:33:13,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 19:33:13,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:33:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 19:33:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=688, Unknown=21, NotChecked=0, Total=812 [2022-02-23 19:33:13,545 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-23 19:33:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:33:17,947 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-02-23 19:33:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 19:33:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-02-23 19:33:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:33:17,948 INFO L225 Difference]: With dead ends: 73 [2022-02-23 19:33:17,948 INFO L226 Difference]: Without dead ends: 70 [2022-02-23 19:33:17,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 131.5s TimeCoverageRelationStatistics Valid=124, Invalid=845, Unknown=23, NotChecked=0, Total=992 [2022-02-23 19:33:17,949 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:33:17,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 826 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:33:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-23 19:33:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-23 19:33:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 19:33:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-02-23 19:33:17,953 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-02-23 19:33:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:33:17,953 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-02-23 19:33:17,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-23 19:33:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-02-23 19:33:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-23 19:33:17,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:33:17,954 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:33:17,961 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 19:33:18,159 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 19:33:18,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:33:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:33:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-02-23 19:33:18,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:33:18,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134758045] [2022-02-23 19:33:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:33:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:33:18,166 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:33:18,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103345079] [2022-02-23 19:33:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:33:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:33:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:33:18,168 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 19:33:18,169 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 19:33:18,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:33:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:33:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-23 19:33:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:33:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-23 19:33:19,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:33:19,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:33:19,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134758045] [2022-02-23 19:33:19,253 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:33:19,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103345079] [2022-02-23 19:33:19,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103345079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:33:19,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:33:19,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-02-23 19:33:19,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251001536] [2022-02-23 19:33:19,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:33:19,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 19:33:19,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:33:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 19:33:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-23 19:33:19,255 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-23 19:33:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:33:19,560 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-02-23 19:33:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 19:33:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-02-23 19:33:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:33:19,561 INFO L225 Difference]: With dead ends: 76 [2022-02-23 19:33:19,561 INFO L226 Difference]: Without dead ends: 73 [2022-02-23 19:33:19,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 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 19:33:19,561 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:33:19,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:33:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-23 19:33:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-23 19:33:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 19:33:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-02-23 19:33:19,565 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-02-23 19:33:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:33:19,565 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-02-23 19:33:19,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-23 19:33:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-02-23 19:33:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-23 19:33:19,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:33:19,566 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:33:19,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-23 19:33:19,767 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 19:33:19,768 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:33:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:33:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-02-23 19:33:19,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:33:19,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652610457] [2022-02-23 19:33:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:33:19,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:33:19,774 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:33:19,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161564714] [2022-02-23 19:33:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:33:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:33:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:33:19,775 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 19:33:19,776 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 19:33:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-23 19:33:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:33:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-02-23 19:33:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:33:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 19:33:20,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:33:21,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:33:21,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652610457] [2022-02-23 19:33:21,966 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:33:21,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161564714] [2022-02-23 19:33:21,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161564714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:33:21,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:33:21,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-02-23 19:33:21,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640821288] [2022-02-23 19:33:21,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:33:21,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 19:33:21,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:33:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 19:33:21,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 19:33:21,968 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-02-23 19:33:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:33:22,351 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-02-23 19:33:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 19:33:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-02-23 19:33:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:33:22,352 INFO L225 Difference]: With dead ends: 79 [2022-02-23 19:33:22,352 INFO L226 Difference]: Without dead ends: 76 [2022-02-23 19:33:22,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 19:33:22,353 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:33:22,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 19:33:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-23 19:33:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-23 19:33:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 19:33:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-02-23 19:33:22,356 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-02-23 19:33:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:33:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-02-23 19:33:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-02-23 19:33:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-02-23 19:33:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-23 19:33:22,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:33:22,357 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:33:22,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 19:33:22,563 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 19:33:22,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:33:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:33:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-02-23 19:33:22,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:33:22,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376219876] [2022-02-23 19:33:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:33:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:33:22,569 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:33:22,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876434829] [2022-02-23 19:33:22,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:33:22,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:33:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:33:22,571 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 19:33:22,572 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 19:33:22,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:33:22,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:33:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-02-23 19:33:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:33:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-02-23 19:33:23,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:01,128 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 (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 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)))) is different from false [2022-02-23 19:34:01,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:01,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376219876] [2022-02-23 19:34:01,130 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:01,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876434829] [2022-02-23 19:34:01,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876434829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:01,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:01,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-02-23 19:34:01,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095059277] [2022-02-23 19:34:01,130 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:01,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 19:34:01,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 19:34:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=826, Unknown=11, NotChecked=58, Total=992 [2022-02-23 19:34:01,131 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-02-23 19:34:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:01,634 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-02-23 19:34:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 19:34:01,635 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-02-23 19:34:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:01,635 INFO L225 Difference]: With dead ends: 82 [2022-02-23 19:34:01,635 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 19:34:01,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=118, Invalid=997, Unknown=11, NotChecked=64, Total=1190 [2022-02-23 19:34:01,636 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:01,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 19:34:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 19:34:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-23 19:34:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-23 19:34:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-02-23 19:34:01,639 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-02-23 19:34:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:01,639 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-02-23 19:34:01,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-02-23 19:34:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-02-23 19:34:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-23 19:34:01,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:01,640 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:01,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-23 19:34:01,845 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 19:34:01,845 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-02-23 19:34:01,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:01,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468440275] [2022-02-23 19:34:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:01,851 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:01,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760320465] [2022-02-23 19:34:01,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:34:01,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:01,868 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 19:34:01,871 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 19:34:03,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-02-23 19:34:03,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-02-23 19:34:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-02-23 19:34:03,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:03,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:03,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468440275] [2022-02-23 19:34:03,662 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:03,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760320465] [2022-02-23 19:34:03,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760320465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:03,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:03,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-02-23 19:34:03,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142499923] [2022-02-23 19:34:03,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:03,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 19:34:03,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 19:34:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-02-23 19:34:03,664 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-02-23 19:34:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:04,098 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-02-23 19:34:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 19:34:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-02-23 19:34:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:04,099 INFO L225 Difference]: With dead ends: 85 [2022-02-23 19:34:04,099 INFO L226 Difference]: Without dead ends: 82 [2022-02-23 19:34:04,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-02-23 19:34:04,100 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:04,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 19:34:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-23 19:34:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-23 19:34:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 19:34:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-02-23 19:34:04,103 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-02-23 19:34:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:04,103 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-02-23 19:34:04,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-02-23 19:34:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-02-23 19:34:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-23 19:34:04,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:04,104 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:04,119 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 19:34:04,311 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 19:34:04,311 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-02-23 19:34:04,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:04,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128258004] [2022-02-23 19:34:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:04,327 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:04,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965193466] [2022-02-23 19:34:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:34:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:04,329 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 19:34:04,330 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 19:34:13,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-02-23 19:34:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-02-23 19:34:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-02-23 19:34:13,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:13,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:13,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128258004] [2022-02-23 19:34:13,719 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:13,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965193466] [2022-02-23 19:34:13,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965193466] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:13,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:13,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-02-23 19:34:13,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874914663] [2022-02-23 19:34:13,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:13,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 19:34:13,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 19:34:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-23 19:34:13,720 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 19:34:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:14,177 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-02-23 19:34:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 19:34:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-02-23 19:34:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:14,178 INFO L225 Difference]: With dead ends: 88 [2022-02-23 19:34:14,178 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 19:34:14,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-02-23 19:34:14,179 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:14,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 19:34:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 19:34:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-23 19:34:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-23 19:34:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-02-23 19:34:14,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-02-23 19:34:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:14,182 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-02-23 19:34:14,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 19:34:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-02-23 19:34:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-02-23 19:34:14,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:14,183 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:14,189 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 19:34:14,389 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 19:34:14,389 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-02-23 19:34:14,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:14,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857243039] [2022-02-23 19:34:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:14,396 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:14,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638919696] [2022-02-23 19:34:14,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:34:14,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:14,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:14,400 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 19:34:14,401 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 19:34:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:34:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-02-23 19:34:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-02-23 19:34:15,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:15,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:15,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857243039] [2022-02-23 19:34:15,772 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:15,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638919696] [2022-02-23 19:34:15,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638919696] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:15,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:15,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-02-23 19:34:15,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781618767] [2022-02-23 19:34:15,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:15,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 19:34:15,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 19:34:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-02-23 19:34:15,773 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-02-23 19:34:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:16,279 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-02-23 19:34:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 19:34:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-02-23 19:34:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:16,281 INFO L225 Difference]: With dead ends: 91 [2022-02-23 19:34:16,281 INFO L226 Difference]: Without dead ends: 88 [2022-02-23 19:34:16,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-02-23 19:34:16,281 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:16,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 19:34:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-23 19:34:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-23 19:34:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 19:34:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-02-23 19:34:16,284 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-02-23 19:34:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:16,284 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-02-23 19:34:16,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-02-23 19:34:16,284 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-02-23 19:34:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-02-23 19:34:16,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:16,285 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:16,292 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 19:34:16,492 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 19:34:16,493 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-02-23 19:34:16,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:16,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180832901] [2022-02-23 19:34:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:16,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:16,499 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:16,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548255891] [2022-02-23 19:34:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:34:16,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:16,501 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 19:34:16,507 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 19:34:17,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:34:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-02-23 19:34:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-02-23 19:34:17,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:17,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:17,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180832901] [2022-02-23 19:34:17,764 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:17,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548255891] [2022-02-23 19:34:17,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548255891] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:17,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:17,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-02-23 19:34:17,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89255814] [2022-02-23 19:34:17,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:17,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 19:34:17,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 19:34:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-02-23 19:34:17,766 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-02-23 19:34:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:18,339 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-02-23 19:34:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 19:34:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-02-23 19:34:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:18,340 INFO L225 Difference]: With dead ends: 94 [2022-02-23 19:34:18,340 INFO L226 Difference]: Without dead ends: 91 [2022-02-23 19:34:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-02-23 19:34:18,341 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:18,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 19:34:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-23 19:34:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-23 19:34:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 19:34:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-02-23 19:34:18,343 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-02-23 19:34:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:18,344 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-02-23 19:34:18,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-02-23 19:34:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-02-23 19:34:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-23 19:34:18,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:18,345 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:18,350 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 19:34:18,550 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 19:34:18,550 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-02-23 19:34:18,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:18,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124069895] [2022-02-23 19:34:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:18,557 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:18,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836087584] [2022-02-23 19:34:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:34:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:18,558 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 19:34:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 19:34:20,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-02-23 19:34:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-02-23 19:34:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-02-23 19:34:21,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:21,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:21,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124069895] [2022-02-23 19:34:21,255 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:21,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836087584] [2022-02-23 19:34:21,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836087584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:21,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:21,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-02-23 19:34:21,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363726763] [2022-02-23 19:34:21,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:21,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 19:34:21,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 19:34:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-23 19:34:21,256 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-02-23 19:34:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:21,881 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-02-23 19:34:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 19:34:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-02-23 19:34:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:21,882 INFO L225 Difference]: With dead ends: 97 [2022-02-23 19:34:21,882 INFO L226 Difference]: Without dead ends: 94 [2022-02-23 19:34:21,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-23 19:34:21,883 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:21,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 19:34:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-23 19:34:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-23 19:34:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 19:34:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-02-23 19:34:21,886 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-02-23 19:34:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:21,887 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-02-23 19:34:21,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-02-23 19:34:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-02-23 19:34:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-02-23 19:34:21,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:21,888 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:21,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:22,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:22,094 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-02-23 19:34:22,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:22,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535192247] [2022-02-23 19:34:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:22,102 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:22,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624925471] [2022-02-23 19:34:22,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:34:22,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:22,103 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-23 19:34:22,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:34:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-02-23 19:34:22,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-02-23 19:34:23,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:23,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:23,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535192247] [2022-02-23 19:34:23,367 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:23,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624925471] [2022-02-23 19:34:23,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624925471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:23,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:23,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-02-23 19:34:23,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351083129] [2022-02-23 19:34:23,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 19:34:23,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:23,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 19:34:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-02-23 19:34:23,368 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-02-23 19:34:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:23,907 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-02-23 19:34:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 19:34:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-02-23 19:34:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:23,908 INFO L225 Difference]: With dead ends: 100 [2022-02-23 19:34:23,908 INFO L226 Difference]: Without dead ends: 97 [2022-02-23 19:34:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 19:34:23,911 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:23,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 19:34:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-23 19:34:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-23 19:34:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-23 19:34:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-02-23 19:34:23,917 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-02-23 19:34:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-02-23 19:34:23,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-02-23 19:34:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-02-23 19:34:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-23 19:34:23,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:23,918 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:23,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-23 19:34:24,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 19:34:24,123 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-02-23 19:34:24,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:24,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120281137] [2022-02-23 19:34:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:24,129 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:24,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965849239] [2022-02-23 19:34:24,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:34:24,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:24,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:24,131 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:24,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-23 19:34:45,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-23 19:34:45,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-02-23 19:34:45,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-02-23 19:34:45,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:46,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:46,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120281137] [2022-02-23 19:34:46,027 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:46,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965849239] [2022-02-23 19:34:46,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965849239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:46,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:46,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-02-23 19:34:46,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409923680] [2022-02-23 19:34:46,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:46,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-23 19:34:46,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-23 19:34:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-02-23 19:34:46,029 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-02-23 19:34:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:46,710 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-02-23 19:34:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 19:34:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-02-23 19:34:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:46,712 INFO L225 Difference]: With dead ends: 103 [2022-02-23 19:34:46,712 INFO L226 Difference]: Without dead ends: 100 [2022-02-23 19:34:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 19:34:46,712 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:46,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 19:34:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-23 19:34:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-23 19:34:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-23 19:34:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-02-23 19:34:46,715 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-02-23 19:34:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:46,715 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-02-23 19:34:46,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-02-23 19:34:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-02-23 19:34:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-23 19:34:46,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:46,716 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:46,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:46,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-23 19:34:46,917 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-02-23 19:34:46,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:46,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154047011] [2022-02-23 19:34:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:46,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:46,923 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:46,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645783544] [2022-02-23 19:34:46,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:34:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:46,925 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:46,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-23 19:34:48,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-02-23 19:34:48,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-02-23 19:34:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-02-23 19:34:49,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:49,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:49,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154047011] [2022-02-23 19:34:49,304 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:49,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645783544] [2022-02-23 19:34:49,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645783544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:49,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:49,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-02-23 19:34:49,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067400364] [2022-02-23 19:34:49,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:49,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 19:34:49,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 19:34:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 19:34:49,306 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-02-23 19:34:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:50,001 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-02-23 19:34:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 19:34:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-02-23 19:34:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:50,002 INFO L225 Difference]: With dead ends: 106 [2022-02-23 19:34:50,002 INFO L226 Difference]: Without dead ends: 103 [2022-02-23 19:34:50,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 19:34:50,002 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:50,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 19:34:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-23 19:34:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-02-23 19:34:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 19:34:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-02-23 19:34:50,005 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-02-23 19:34:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:50,006 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-02-23 19:34:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-02-23 19:34:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-02-23 19:34:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-23 19:34:50,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:50,007 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:50,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:50,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-23 19:34:50,207 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-02-23 19:34:50,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:50,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449483494] [2022-02-23 19:34:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:50,214 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:50,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028119150] [2022-02-23 19:34:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:34:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:50,215 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:50,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-23 19:34:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:34:51,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-02-23 19:34:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-02-23 19:34:51,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:52,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:52,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449483494] [2022-02-23 19:34:52,073 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:52,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028119150] [2022-02-23 19:34:52,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028119150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:52,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:52,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-02-23 19:34:52,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368800380] [2022-02-23 19:34:52,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:52,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-23 19:34:52,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-23 19:34:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 19:34:52,075 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-02-23 19:34:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:52,858 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-02-23 19:34:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-23 19:34:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-02-23 19:34:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:52,859 INFO L225 Difference]: With dead ends: 109 [2022-02-23 19:34:52,859 INFO L226 Difference]: Without dead ends: 106 [2022-02-23 19:34:52,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 19:34:52,859 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:52,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 19:34:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-23 19:34:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-02-23 19:34:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-23 19:34:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-02-23 19:34:52,862 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-02-23 19:34:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:52,862 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-02-23 19:34:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-02-23 19:34:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-02-23 19:34:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-02-23 19:34:52,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:52,863 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:52,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:53,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-23 19:34:53,070 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-02-23 19:34:53,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:53,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201631553] [2022-02-23 19:34:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:53,080 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:53,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539783393] [2022-02-23 19:34:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:34:53,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:53,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:53,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-23 19:34:53,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:34:53,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-02-23 19:34:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-02-23 19:34:54,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:54,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:54,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201631553] [2022-02-23 19:34:54,743 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:54,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539783393] [2022-02-23 19:34:54,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539783393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:54,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:54,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-02-23 19:34:54,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601985818] [2022-02-23 19:34:54,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:54,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-23 19:34:54,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-23 19:34:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 19:34:54,744 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-02-23 19:34:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:55,600 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-02-23 19:34:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-23 19:34:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-02-23 19:34:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:55,601 INFO L225 Difference]: With dead ends: 112 [2022-02-23 19:34:55,601 INFO L226 Difference]: Without dead ends: 109 [2022-02-23 19:34:55,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-02-23 19:34:55,602 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:55,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 19:34:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-23 19:34:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-02-23 19:34:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-23 19:34:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-02-23 19:34:55,604 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-02-23 19:34:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:55,605 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-02-23 19:34:55,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-02-23 19:34:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-02-23 19:34:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-23 19:34:55,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:55,606 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:55,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-23 19:34:55,807 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-02-23 19:34:55,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:55,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956380757] [2022-02-23 19:34:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:55,814 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:55,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137993233] [2022-02-23 19:34:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:34:55,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:55,819 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:55,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-23 19:34:57,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-02-23 19:34:57,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:34:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 116 conjunts are in the unsatisfiable core [2022-02-23 19:34:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:34:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-02-23 19:34:58,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:34:58,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:34:58,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956380757] [2022-02-23 19:34:58,425 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:34:58,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137993233] [2022-02-23 19:34:58,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137993233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:34:58,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:34:58,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-02-23 19:34:58,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708764137] [2022-02-23 19:34:58,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:34:58,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-23 19:34:58,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:34:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-23 19:34:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 19:34:58,427 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-02-23 19:34:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:34:59,341 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-02-23 19:34:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 19:34:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-02-23 19:34:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:34:59,342 INFO L225 Difference]: With dead ends: 115 [2022-02-23 19:34:59,342 INFO L226 Difference]: Without dead ends: 112 [2022-02-23 19:34:59,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 19:34:59,343 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 19:34:59,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2365 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 19:34:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-23 19:34:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-02-23 19:34:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 19:34:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-02-23 19:34:59,345 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-02-23 19:34:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:34:59,346 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-02-23 19:34:59,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-02-23 19:34:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-02-23 19:34:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-23 19:34:59,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:34:59,347 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:34:59,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-23 19:34:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:59,553 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:34:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:34:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-02-23 19:34:59,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:34:59,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281508244] [2022-02-23 19:34:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:34:59,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:34:59,560 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:34:59,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351540414] [2022-02-23 19:34:59,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:34:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:34:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:34:59,562 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:34:59,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-23 19:35:00,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:35:00,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-02-23 19:35:00,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-02-23 19:35:00,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:01,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:01,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281508244] [2022-02-23 19:35:01,181 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:01,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351540414] [2022-02-23 19:35:01,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351540414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:01,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:01,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-02-23 19:35:01,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554585105] [2022-02-23 19:35:01,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 19:35:01,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 19:35:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-02-23 19:35:01,183 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 19:35:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:02,166 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-02-23 19:35:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-23 19:35:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-02-23 19:35:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:02,167 INFO L225 Difference]: With dead ends: 118 [2022-02-23 19:35:02,167 INFO L226 Difference]: Without dead ends: 115 [2022-02-23 19:35:02,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-02-23 19:35:02,168 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:02,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2505 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 19:35:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-23 19:35:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-23 19:35:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 34 states have call successors, (34), 6 states have call predecessors, (34), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 19:35:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-02-23 19:35:02,171 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-02-23 19:35:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-02-23 19:35:02,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 19:35:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-02-23 19:35:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-02-23 19:35:02,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:02,172 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:02,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-23 19:35:02,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-23 19:35:02,378 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-02-23 19:35:02,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:02,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441979978] [2022-02-23 19:35:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:02,385 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:02,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937456090] [2022-02-23 19:35:02,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:35:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:02,389 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-23 19:35:11,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-02-23 19:35:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 124 conjunts are in the unsatisfiable core [2022-02-23 19:35:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-02-23 19:35:12,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:12,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:12,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441979978] [2022-02-23 19:35:12,624 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:12,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937456090] [2022-02-23 19:35:12,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937456090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:12,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:12,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-02-23 19:35:12,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170870666] [2022-02-23 19:35:12,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:12,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-23 19:35:12,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-23 19:35:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 19:35:12,625 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-02-23 19:35:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:13,619 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-02-23 19:35:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 19:35:13,620 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-02-23 19:35:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:13,620 INFO L225 Difference]: With dead ends: 121 [2022-02-23 19:35:13,620 INFO L226 Difference]: Without dead ends: 118 [2022-02-23 19:35:13,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 19:35:13,621 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:13,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 19:35:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-23 19:35:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-02-23 19:35:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 35 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-02-23 19:35:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-02-23 19:35:13,624 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 226 [2022-02-23 19:35:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:13,624 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-02-23 19:35:13,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-02-23 19:35:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-02-23 19:35:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-23 19:35:13,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:13,625 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:13,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-23 19:35:13,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:13,826 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash 519955712, now seen corresponding path program 30 times [2022-02-23 19:35:13,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:13,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731444805] [2022-02-23 19:35:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:13,833 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:13,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644584508] [2022-02-23 19:35:13,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:35:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:13,835 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:13,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-23 19:35:24,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-02-23 19:35:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:24,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 129 conjunts are in the unsatisfiable core [2022-02-23 19:35:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-02-23 19:35:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:28,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:28,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731444805] [2022-02-23 19:35:28,119 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:28,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644584508] [2022-02-23 19:35:28,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644584508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:28,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:28,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-02-23 19:35:28,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024045284] [2022-02-23 19:35:28,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:28,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 19:35:28,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 19:35:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 19:35:28,121 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-02-23 19:35:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:29,240 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-02-23 19:35:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-23 19:35:29,243 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-02-23 19:35:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:29,244 INFO L225 Difference]: With dead ends: 124 [2022-02-23 19:35:29,244 INFO L226 Difference]: Without dead ends: 121 [2022-02-23 19:35:29,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 19:35:29,245 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:29,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 19:35:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-23 19:35:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-02-23 19:35:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 19:35:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2022-02-23 19:35:29,248 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 233 [2022-02-23 19:35:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:29,248 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2022-02-23 19:35:29,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-02-23 19:35:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2022-02-23 19:35:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-02-23 19:35:29,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:29,249 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:29,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-23 19:35:29,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:29,479 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1893318866, now seen corresponding path program 31 times [2022-02-23 19:35:29,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:29,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952773620] [2022-02-23 19:35:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:29,487 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:29,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379677777] [2022-02-23 19:35:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:35:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:29,489 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:29,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-23 19:35:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:35:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 132 conjunts are in the unsatisfiable core [2022-02-23 19:35:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-02-23 19:35:31,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:31,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:31,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952773620] [2022-02-23 19:35:31,431 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:31,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379677777] [2022-02-23 19:35:31,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379677777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:31,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:31,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-02-23 19:35:31,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545695775] [2022-02-23 19:35:31,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:31,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-23 19:35:31,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-23 19:35:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 19:35:31,433 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-02-23 19:35:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:32,604 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-02-23 19:35:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-23 19:35:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-02-23 19:35:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:32,605 INFO L225 Difference]: With dead ends: 127 [2022-02-23 19:35:32,605 INFO L226 Difference]: Without dead ends: 124 [2022-02-23 19:35:32,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 19:35:32,606 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2834 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:32,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2949 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 19:35:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-23 19:35:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-02-23 19:35:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 37 states have call successors, (37), 6 states have call predecessors, (37), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-23 19:35:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-02-23 19:35:32,609 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 240 [2022-02-23 19:35:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:32,609 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-02-23 19:35:32,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-02-23 19:35:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-02-23 19:35:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-02-23 19:35:32,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:32,610 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:32,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-23 19:35:32,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-23 19:35:32,816 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 985158848, now seen corresponding path program 32 times [2022-02-23 19:35:32,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:32,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529765275] [2022-02-23 19:35:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:32,823 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:32,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851508199] [2022-02-23 19:35:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:35:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:32,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:32,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-23 19:35:33,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:35:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 137 conjunts are in the unsatisfiable core [2022-02-23 19:35:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-02-23 19:35:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:38,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:38,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529765275] [2022-02-23 19:35:38,468 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:38,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851508199] [2022-02-23 19:35:38,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851508199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:38,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:38,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-02-23 19:35:38,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997578786] [2022-02-23 19:35:38,469 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-23 19:35:38,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-23 19:35:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=3940, Unknown=0, NotChecked=0, Total=5112 [2022-02-23 19:35:38,470 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-02-23 19:35:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:39,766 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2022-02-23 19:35:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-23 19:35:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-02-23 19:35:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:39,767 INFO L225 Difference]: With dead ends: 130 [2022-02-23 19:35:39,767 INFO L226 Difference]: Without dead ends: 127 [2022-02-23 19:35:39,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1182, Invalid=4220, Unknown=0, NotChecked=0, Total=5402 [2022-02-23 19:35:39,768 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 19:35:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-23 19:35:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-23 19:35:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 38 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 19:35:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-02-23 19:35:39,771 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 247 [2022-02-23 19:35:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-02-23 19:35:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-02-23 19:35:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-02-23 19:35:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-23 19:35:39,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:39,772 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:39,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-23 19:35:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-23 19:35:39,980 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash 456530194, now seen corresponding path program 33 times [2022-02-23 19:35:39,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:39,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630085856] [2022-02-23 19:35:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:39,992 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:39,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039016010] [2022-02-23 19:35:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:35:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:39,996 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:39,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-23 19:35:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-02-23 19:35:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-02-23 19:35:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-02-23 19:35:43,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:43,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:43,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630085856] [2022-02-23 19:35:43,928 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:43,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039016010] [2022-02-23 19:35:43,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039016010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:43,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:43,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-02-23 19:35:43,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363108676] [2022-02-23 19:35:43,929 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:43,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-23 19:35:43,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-23 19:35:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 19:35:43,930 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-02-23 19:35:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:44,986 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-02-23 19:35:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-23 19:35:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-02-23 19:35:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:44,987 INFO L225 Difference]: With dead ends: 133 [2022-02-23 19:35:44,987 INFO L226 Difference]: Without dead ends: 130 [2022-02-23 19:35:44,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 19:35:44,987 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:44,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 19:35:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-23 19:35:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-23 19:35:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-23 19:35:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-02-23 19:35:44,991 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 254 [2022-02-23 19:35:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-02-23 19:35:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-02-23 19:35:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-02-23 19:35:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-02-23 19:35:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:44,992 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:45,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-23 19:35:45,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-23 19:35:45,201 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -795593600, now seen corresponding path program 34 times [2022-02-23 19:35:45,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:45,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055208244] [2022-02-23 19:35:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:45,213 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:45,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885282577] [2022-02-23 19:35:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:35:45,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:45,214 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:45,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-23 19:35:46,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:35:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:35:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 144 conjunts are in the unsatisfiable core [2022-02-23 19:35:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:35:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-02-23 19:35:47,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:35:47,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:35:47,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055208244] [2022-02-23 19:35:47,311 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:35:47,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885282577] [2022-02-23 19:35:47,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885282577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:35:47,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:35:47,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-02-23 19:35:47,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641267088] [2022-02-23 19:35:47,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:35:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-23 19:35:47,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:35:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-23 19:35:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 19:35:47,313 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-02-23 19:35:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:35:48,724 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2022-02-23 19:35:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-23 19:35:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-02-23 19:35:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:35:48,725 INFO L225 Difference]: With dead ends: 136 [2022-02-23 19:35:48,725 INFO L226 Difference]: Without dead ends: 133 [2022-02-23 19:35:48,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-02-23 19:35:48,726 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:35:48,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-23 19:35:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-23 19:35:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-23 19:35:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 40 states have call successors, (40), 6 states have call predecessors, (40), 4 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-23 19:35:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-02-23 19:35:48,729 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 261 [2022-02-23 19:35:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:35:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-02-23 19:35:48,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-02-23 19:35:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-02-23 19:35:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-23 19:35:48,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:35:48,730 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:35:48,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-23 19:35:48,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:48,939 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:35:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:35:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1475543378, now seen corresponding path program 35 times [2022-02-23 19:35:48,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:35:48,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644383820] [2022-02-23 19:35:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:35:48,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:35:48,947 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:35:48,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123793355] [2022-02-23 19:35:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:35:48,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:35:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:35:48,952 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:35:48,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-23 19:36:16,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-02-23 19:36:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:36:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 148 conjunts are in the unsatisfiable core [2022-02-23 19:36:16,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:36:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-02-23 19:36:17,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:36:17,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:36:17,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644383820] [2022-02-23 19:36:17,903 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:36:17,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123793355] [2022-02-23 19:36:17,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123793355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:36:17,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:36:17,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-02-23 19:36:17,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59154916] [2022-02-23 19:36:17,903 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:36:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-23 19:36:17,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:36:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-23 19:36:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 19:36:17,905 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-02-23 19:36:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:36:19,130 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-02-23 19:36:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-23 19:36:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-02-23 19:36:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:36:19,133 INFO L225 Difference]: With dead ends: 139 [2022-02-23 19:36:19,133 INFO L226 Difference]: Without dead ends: 136 [2022-02-23 19:36:19,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-02-23 19:36:19,134 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:36:19,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 19:36:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-23 19:36:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-02-23 19:36:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 41 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-23 19:36:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-02-23 19:36:19,156 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 268 [2022-02-23 19:36:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:36:19,156 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-02-23 19:36:19,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-02-23 19:36:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-02-23 19:36:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-23 19:36:19,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:36:19,157 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:36:19,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-23 19:36:19,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-23 19:36:19,358 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:36:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:36:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 290292800, now seen corresponding path program 36 times [2022-02-23 19:36:19,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:36:19,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782453785] [2022-02-23 19:36:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:36:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:36:19,366 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:36:19,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877850721] [2022-02-23 19:36:19,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:36:19,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:36:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:36:19,371 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:36:19,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-23 19:36:39,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-02-23 19:36:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:36:39,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 153 conjunts are in the unsatisfiable core [2022-02-23 19:36:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:36:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-02-23 19:36:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:36:45,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:36:45,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782453785] [2022-02-23 19:36:45,433 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:36:45,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877850721] [2022-02-23 19:36:45,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877850721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:36:45,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:36:45,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-02-23 19:36:45,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951780895] [2022-02-23 19:36:45,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:36:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-23 19:36:45,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:36:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-23 19:36:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-02-23 19:36:45,435 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-02-23 19:36:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:36:47,080 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2022-02-23 19:36:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-23 19:36:47,081 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2022-02-23 19:36:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:36:47,081 INFO L225 Difference]: With dead ends: 142 [2022-02-23 19:36:47,081 INFO L226 Difference]: Without dead ends: 139 [2022-02-23 19:36:47,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1470, Invalid=5172, Unknown=0, NotChecked=0, Total=6642 [2022-02-23 19:36:47,082 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:36:47,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3769 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-23 19:36:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-23 19:36:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-02-23 19:36:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-23 19:36:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-02-23 19:36:47,085 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 275 [2022-02-23 19:36:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:36:47,085 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-02-23 19:36:47,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-02-23 19:36:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-02-23 19:36:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-02-23 19:36:47,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:36:47,086 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:36:47,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-23 19:36:47,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-23 19:36:47,295 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:36:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:36:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -355173998, now seen corresponding path program 37 times [2022-02-23 19:36:47,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:36:47,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601021673] [2022-02-23 19:36:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:36:47,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:36:47,303 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:36:47,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68116149] [2022-02-23 19:36:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:36:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:36:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:36:47,304 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:36:47,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-23 19:36:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:36:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 156 conjunts are in the unsatisfiable core [2022-02-23 19:36:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:36:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-02-23 19:36:49,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:36:49,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:36:49,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601021673] [2022-02-23 19:36:49,792 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:36:49,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68116149] [2022-02-23 19:36:49,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68116149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:36:49,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:36:49,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-02-23 19:36:49,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820950843] [2022-02-23 19:36:49,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:36:49,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-23 19:36:49,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:36:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-23 19:36:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-02-23 19:36:49,793 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-02-23 19:36:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:36:51,134 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-02-23 19:36:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-23 19:36:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2022-02-23 19:36:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:36:51,135 INFO L225 Difference]: With dead ends: 145 [2022-02-23 19:36:51,135 INFO L226 Difference]: Without dead ends: 142 [2022-02-23 19:36:51,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 19:36:51,136 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 19:36:51,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3945 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-23 19:36:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-23 19:36:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-02-23 19:36:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 43 states have call successors, (43), 6 states have call predecessors, (43), 4 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-23 19:36:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-02-23 19:36:51,139 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 282 [2022-02-23 19:36:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:36:51,139 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-02-23 19:36:51,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-02-23 19:36:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-02-23 19:36:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-23 19:36:51,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:36:51,140 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:36:51,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-23 19:36:51,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-23 19:36:51,348 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:36:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:36:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 882918400, now seen corresponding path program 38 times [2022-02-23 19:36:51,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:36:51,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960817841] [2022-02-23 19:36:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:36:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:36:51,356 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:36:51,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518281619] [2022-02-23 19:36:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:36:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:36:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:36:51,372 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:36:51,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-23 19:36:52,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:36:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:36:52,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 160 conjunts are in the unsatisfiable core [2022-02-23 19:36:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:36:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-02-23 19:36:53,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:36:53,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:36:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960817841] [2022-02-23 19:36:53,843 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:36:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518281619] [2022-02-23 19:36:53,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518281619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:36:53,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:36:53,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-02-23 19:36:53,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729507968] [2022-02-23 19:36:53,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:36:53,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-23 19:36:53,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:36:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-23 19:36:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 19:36:53,846 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-02-23 19:36:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:36:55,389 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2022-02-23 19:36:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-23 19:36:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2022-02-23 19:36:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:36:55,390 INFO L225 Difference]: With dead ends: 148 [2022-02-23 19:36:55,390 INFO L226 Difference]: Without dead ends: 145 [2022-02-23 19:36:55,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-02-23 19:36:55,391 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4125 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:36:55,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4125 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-23 19:36:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-23 19:36:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-23 19:36:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 44 states have call successors, (44), 6 states have call predecessors, (44), 4 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 19:36:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-02-23 19:36:55,394 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 289 [2022-02-23 19:36:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:36:55,394 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-02-23 19:36:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-02-23 19:36:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-02-23 19:36:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-02-23 19:36:55,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:36:55,395 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:36:55,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-23 19:36:55,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-23 19:36:55,603 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:36:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:36:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1331789358, now seen corresponding path program 39 times [2022-02-23 19:36:55,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:36:55,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837847501] [2022-02-23 19:36:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:36:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:36:55,610 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:36:55,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456508553] [2022-02-23 19:36:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:36:55,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:36:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:36:55,612 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:36:55,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-23 19:37:30,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-02-23 19:37:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:37:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 164 conjunts are in the unsatisfiable core [2022-02-23 19:37:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 80 proven. 2340 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-02-23 19:37:31,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:32,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:32,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837847501] [2022-02-23 19:37:32,082 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:32,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456508553] [2022-02-23 19:37:32,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456508553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:32,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:32,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-02-23 19:37:32,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166799902] [2022-02-23 19:37:32,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:32,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-23 19:37:32,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-23 19:37:32,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 19:37:32,083 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-02-23 19:37:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:33,616 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2022-02-23 19:37:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-23 19:37:33,617 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) Word has length 296 [2022-02-23 19:37:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:33,617 INFO L225 Difference]: With dead ends: 151 [2022-02-23 19:37:33,617 INFO L226 Difference]: Without dead ends: 148 [2022-02-23 19:37:33,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 19:37:33,618 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:33,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4309 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3533 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-23 19:37:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-23 19:37:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-02-23 19:37:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-23 19:37:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-02-23 19:37:33,621 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 296 [2022-02-23 19:37:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:33,621 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-02-23 19:37:33,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-02-23 19:37:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-02-23 19:37:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-02-23 19:37:33,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:33,623 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:33,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-23 19:37:33,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:33,823 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash 961049536, now seen corresponding path program 40 times [2022-02-23 19:37:33,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:33,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029643141] [2022-02-23 19:37:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:33,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:33,832 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:33,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939569631] [2022-02-23 19:37:33,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:37:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:33,834 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:37:33,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-23 19:37:35,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:37:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:37:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 168 conjunts are in the unsatisfiable core [2022-02-23 19:37:35,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-02-23 19:37:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:36,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:36,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029643141] [2022-02-23 19:37:36,296 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:36,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939569631] [2022-02-23 19:37:36,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939569631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:36,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:36,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-02-23 19:37:36,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562833558] [2022-02-23 19:37:36,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:36,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-23 19:37:36,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-23 19:37:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-02-23 19:37:36,309 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-02-23 19:37:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:37,823 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2022-02-23 19:37:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 19:37:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) Word has length 303 [2022-02-23 19:37:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:37,824 INFO L225 Difference]: With dead ends: 154 [2022-02-23 19:37:37,824 INFO L226 Difference]: Without dead ends: 151 [2022-02-23 19:37:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-02-23 19:37:37,834 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 4355 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:37,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4497 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-23 19:37:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-23 19:37:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-02-23 19:37:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 46 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-23 19:37:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2022-02-23 19:37:37,860 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 303 [2022-02-23 19:37:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:37,862 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2022-02-23 19:37:37,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-02-23 19:37:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2022-02-23 19:37:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-02-23 19:37:37,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:37,873 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:37,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:38,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:38,074 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash -552265198, now seen corresponding path program 41 times [2022-02-23 19:37:38,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:38,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302898927] [2022-02-23 19:37:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:38,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:38,082 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:38,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622429010] [2022-02-23 19:37:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:37:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:38,085 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:37:38,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process