/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/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 16:48:54,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 16:48:54,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 16:48:54,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 16:48:54,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 16:48:54,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 16:48:54,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 16:48:54,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 16:48:54,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 16:48:54,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 16:48:54,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 16:48:54,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 16:48:54,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 16:48:54,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 16:48:54,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 16:48:54,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 16:48:54,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 16:48:54,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 16:48:54,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 16:48:54,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 16:48:54,924 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 16:48:54,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 16:48:54,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 16:48:54,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 16:48:54,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 16:48:54,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 16:48:54,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 16:48:54,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 16:48:54,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 16:48:54,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 16:48:54,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 16:48:54,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 16:48:54,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 16:48:54,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 16:48:54,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 16:48:54,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 16:48:54,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 16:48:54,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 16:48:54,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 16:48:54,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 16:48:54,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 16:48:54,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 16:48:54,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 16:48:54,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 16:48:54,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 16:48:54,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 16:48:54,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 16:48:54,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 16:48:54,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 16:48:54,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 16:48:54,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:48:54,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 16:48:54,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 16:48:54,965 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 16:48:54,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 16:48:55,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 16:48:55,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 16:48:55,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 16:48:55,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 16:48:55,238 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 16:48:55,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-17 16:48:55,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59a22e24/c39b04ca38b742e5bdd2893f230cf1ed/FLAG41ff856d3 [2022-03-17 16:48:55,696 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 16:48:55,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-17 16:48:55,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59a22e24/c39b04ca38b742e5bdd2893f230cf1ed/FLAG41ff856d3 [2022-03-17 16:48:56,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59a22e24/c39b04ca38b742e5bdd2893f230cf1ed [2022-03-17 16:48:56,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 16:48:56,100 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 16:48:56,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 16:48:56,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 16:48:56,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 16:48:56,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17114dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56, skipping insertion in model container [2022-03-17 16:48:56,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 16:48:56,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 16:48:56,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2022-03-17 16:48:56,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:48:56,289 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 16:48:56,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2022-03-17 16:48:56,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:48:56,326 INFO L208 MainTranslator]: Completed translation [2022-03-17 16:48:56,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56 WrapperNode [2022-03-17 16:48:56,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 16:48:56,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 16:48:56,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 16:48:56,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 16:48:56,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 16:48:56,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 16:48:56,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 16:48:56,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 16:48:56,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:48:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:56,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 16:48:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 16:48:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 16:48:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 16:48:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 16:48:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 16:48:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 16:48:56,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 16:48:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 16:48:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 16:48:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 16:48:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 16:48:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 16:48:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 16:48:56,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 16:48:56,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 16:48:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 16:48:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 16:48:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 16:48:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 16:48:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 16:48:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 16:48:56,498 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 16:48:56,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 16:48:56,603 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 16:48:56,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 16:48:56,609 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 16:48:56,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:48:56 BoogieIcfgContainer [2022-03-17 16:48:56,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 16:48:56,611 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 16:48:56,611 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 16:48:56,612 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 16:48:56,615 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:48:56" (1/1) ... [2022-03-17 16:48:56,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:48:56 BasicIcfg [2022-03-17 16:48:56,635 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 16:48:56,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 16:48:56,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 16:48:56,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 16:48:56,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 04:48:56" (1/4) ... [2022-03-17 16:48:56,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb313f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:48:56, skipping insertion in model container [2022-03-17 16:48:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:48:56" (2/4) ... [2022-03-17 16:48:56,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb313f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:48:56, skipping insertion in model container [2022-03-17 16:48:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:48:56" (3/4) ... [2022-03-17 16:48:56,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb313f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:48:56, skipping insertion in model container [2022-03-17 16:48:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:48:56" (4/4) ... [2022-03-17 16:48:56,642 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.cJordan [2022-03-17 16:48:56,647 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 16:48:56,647 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 16:48:56,698 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 16:48:56,704 INFO L340 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 [2022-03-17 16:48:56,705 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 16:48:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 16:48:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 16:48:56,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:56,757 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:56,757 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-03-17 16:48:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:56,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942517708] [2022-03-17 16:48:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:56,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:48:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 16:48:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 16:48:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:48:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:57,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942517708] [2022-03-17 16:48:57,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942517708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:48:57,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:48:57,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:48:57,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250433795] [2022-03-17 16:48:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:48:57,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:48:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:48:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:48:57,118 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:48:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:57,225 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-03-17 16:48:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:48:57,227 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-17 16:48:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:57,236 INFO L225 Difference]: With dead ends: 36 [2022-03-17 16:48:57,237 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 16:48:57,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:48:57,246 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:57,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:48:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 16:48:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-17 16:48:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:48:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-17 16:48:57,290 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-17 16:48:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:57,291 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-17 16:48:57,292 INFO L479 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:48:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-17 16:48:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:48:57,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:57,295 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:57,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 16:48:57,295 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-03-17 16:48:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:57,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014335975] [2022-03-17 16:48:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:57,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:48:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 16:48:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 16:48:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:48:57,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014335975] [2022-03-17 16:48:57,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014335975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:48:57,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:48:57,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:48:57,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296265642] [2022-03-17 16:48:57,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:48:57,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:48:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:57,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:48:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:48:57,464 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:48:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:57,597 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-17 16:48:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:48:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 16:48:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:57,600 INFO L225 Difference]: With dead ends: 32 [2022-03-17 16:48:57,600 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 16:48:57,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:48:57,607 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:57,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:48:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 16:48:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 16:48:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:48:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-17 16:48:57,616 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-17 16:48:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:57,616 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-17 16:48:57,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:48:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-17 16:48:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:48:57,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:57,617 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:57,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 16:48:57,618 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-03-17 16:48:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:57,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341050287] [2022-03-17 16:48:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:57,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:48:57,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87681508] [2022-03-17 16:48:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:57,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:57,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:57,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:48:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 16:48:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:57,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:48:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:48:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:48:57,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:48:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341050287] [2022-03-17 16:48:57,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:48:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87681508] [2022-03-17 16:48:57,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87681508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:48:57,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:48:57,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:48:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389098108] [2022-03-17 16:48:57,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:48:57,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:48:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:48:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:48:57,912 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:48:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:57,957 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-03-17 16:48:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:48:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-17 16:48:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:57,958 INFO L225 Difference]: With dead ends: 47 [2022-03-17 16:48:57,958 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 16:48:57,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:48:57,960 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:57,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 155 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:48:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 16:48:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-17 16:48:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 16:48:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-17 16:48:57,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-17 16:48:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:57,969 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-17 16:48:57,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:48:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-17 16:48:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 16:48:57,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:57,970 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:57,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 16:48:58,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:58,176 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-03-17 16:48:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230670997] [2022-03-17 16:48:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:58,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:48:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942469909] [2022-03-17 16:48:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:58,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:58,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:48:58,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 16:48:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:48:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:48:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:48:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:48:58,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230670997] [2022-03-17 16:48:58,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:48:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942469909] [2022-03-17 16:48:58,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942469909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 16:48:58,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:48:58,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 16:48:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5483805] [2022-03-17 16:48:58,513 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 16:48:58,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:48:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:58,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:48:58,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:48:58,514 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:48:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:58,635 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-17 16:48:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 16:48:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-17 16:48:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:58,643 INFO L225 Difference]: With dead ends: 51 [2022-03-17 16:48:58,643 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 16:48:58,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:48:58,647 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:58,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:48:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 16:48:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 16:48:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 16:48:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-17 16:48:58,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-17 16:48:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:58,670 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-17 16:48:58,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:48:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-17 16:48:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 16:48:58,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:58,673 INFO L500 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, 1, 1, 1] [2022-03-17 16:48:58,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 16:48:58,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 16:48:58,888 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-03-17 16:48:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:58,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916192412] [2022-03-17 16:48:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:58,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:48:58,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778692914] [2022-03-17 16:48:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:58,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:58,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:48:58,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 16:48:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:48:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:48:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 16:48:59,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:48:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 16:48:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916192412] [2022-03-17 16:48:59,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:48:59,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778692914] [2022-03-17 16:48:59,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778692914] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:48:59,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:48:59,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-17 16:48:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927832193] [2022-03-17 16:48:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:48:59,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:48:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:48:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:48:59,178 INFO L87 Difference]: Start difference. First operand 50 states and 66 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 16:48:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:59,233 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-03-17 16:48:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:48:59,233 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 16:48:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:59,237 INFO L225 Difference]: With dead ends: 73 [2022-03-17 16:48:59,237 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 16:48:59,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 16:48:59,238 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:59,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:48:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 16:48:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-17 16:48:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 16:48:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-17 16:48:59,258 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-17 16:48:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:59,259 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-17 16:48:59,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 16:48:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-17 16:48:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 16:48:59,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:59,261 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:59,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 16:48:59,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:59,476 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-03-17 16:48:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376213060] [2022-03-17 16:48:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:59,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:48:59,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314430821] [2022-03-17 16:48:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:59,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:59,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:59,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:48:59,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 16:48:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 16:48:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:48:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 16:48:59,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:48:59,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:48:59,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376213060] [2022-03-17 16:48:59,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:48:59,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314430821] [2022-03-17 16:48:59,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314430821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:48:59,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:48:59,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:48:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148314457] [2022-03-17 16:48:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:48:59,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:48:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:48:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:48:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:48:59,598 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-17 16:48:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:48:59,635 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2022-03-17 16:48:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:48:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-17 16:48:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:48:59,636 INFO L225 Difference]: With dead ends: 85 [2022-03-17 16:48:59,636 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 16:48:59,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:48:59,637 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:48:59,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:48:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 16:48:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-17 16:48:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-17 16:48:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-17 16:48:59,646 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-17 16:48:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:48:59,646 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-17 16:48:59,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-17 16:48:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-17 16:48:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 16:48:59,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:48:59,647 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:48:59,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 16:48:59,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:59,864 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:48:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:48:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-03-17 16:48:59,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:48:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529877132] [2022-03-17 16:48:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:59,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:48:59,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:48:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422248145] [2022-03-17 16:48:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:48:59,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:48:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:48:59,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:48:59,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 16:48:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:48:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:48:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 16:49:00,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 16:49:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529877132] [2022-03-17 16:49:00,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422248145] [2022-03-17 16:49:00,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422248145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:00,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:00,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 16:49:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889439547] [2022-03-17 16:49:00,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:00,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:49:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:49:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:49:00,128 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 16:49:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:00,241 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-03-17 16:49:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 16:49:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2022-03-17 16:49:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:00,246 INFO L225 Difference]: With dead ends: 202 [2022-03-17 16:49:00,246 INFO L226 Difference]: Without dead ends: 200 [2022-03-17 16:49:00,247 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:49:00,248 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:00,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 176 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:49:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-17 16:49:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-03-17 16:49:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 120 states have internal predecessors, (133), 63 states have call successors, (63), 23 states have call predecessors, (63), 21 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-17 16:49:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2022-03-17 16:49:00,288 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 42 [2022-03-17 16:49:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:00,289 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2022-03-17 16:49:00,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 16:49:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2022-03-17 16:49:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 16:49:00,290 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:00,290 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:00,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:00,491 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-03-17 16:49:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232197485] [2022-03-17 16:49:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:00,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:00,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:00,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196472853] [2022-03-17 16:49:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:00,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:00,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:00,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 16:49:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:49:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 16:49:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:49:00,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:49:00,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232197485] [2022-03-17 16:49:00,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196472853] [2022-03-17 16:49:00,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196472853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:49:00,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:49:00,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:49:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699003130] [2022-03-17 16:49:00,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:49:00,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:49:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:49:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:49:00,725 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 16:49:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:00,760 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2022-03-17 16:49:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:49:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-17 16:49:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:00,765 INFO L225 Difference]: With dead ends: 206 [2022-03-17 16:49:00,765 INFO L226 Difference]: Without dead ends: 203 [2022-03-17 16:49:00,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:49:00,766 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:00,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:49:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-17 16:49:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-17 16:49:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 129 states have internal predecessors, (142), 60 states have call successors, (60), 26 states have call predecessors, (60), 24 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-17 16:49:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2022-03-17 16:49:00,785 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 42 [2022-03-17 16:49:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:00,785 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2022-03-17 16:49:00,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 16:49:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2022-03-17 16:49:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 16:49:00,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:00,786 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:00,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:01,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:01,012 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-03-17 16:49:01,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146218644] [2022-03-17 16:49:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:01,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:01,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296562840] [2022-03-17 16:49:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:01,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:01,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:01,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 16:49:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:49:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 16:49:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:49:01,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:49:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146218644] [2022-03-17 16:49:01,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:01,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296562840] [2022-03-17 16:49:01,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296562840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:01,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:01,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 16:49:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060379145] [2022-03-17 16:49:01,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:01,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 16:49:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 16:49:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:49:01,286 INFO L87 Difference]: Start difference. First operand 203 states and 254 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 16:49:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:01,409 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2022-03-17 16:49:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 16:49:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-17 16:49:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:01,413 INFO L225 Difference]: With dead ends: 230 [2022-03-17 16:49:01,413 INFO L226 Difference]: Without dead ends: 216 [2022-03-17 16:49:01,414 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:49:01,418 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:01,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:49:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-17 16:49:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-03-17 16:49:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 128 states have (on average 1.1640625) internal successors, (149), 139 states have internal predecessors, (149), 59 states have call successors, (59), 27 states have call predecessors, (59), 26 states have return successors, (54), 47 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-17 16:49:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-03-17 16:49:01,438 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 44 [2022-03-17 16:49:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:01,438 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-03-17 16:49:01,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 16:49:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-03-17 16:49:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 16:49:01,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:01,443 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:01,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:01,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:01,668 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-03-17 16:49:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692409059] [2022-03-17 16:49:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:01,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:01,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155322458] [2022-03-17 16:49:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:49:01,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:01,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:01,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 16:49:01,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 16:49:01,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:49:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 16:49:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 16:49:01,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 16:49:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692409059] [2022-03-17 16:49:02,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:02,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155322458] [2022-03-17 16:49:02,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155322458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:02,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:02,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 16:49:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124350900] [2022-03-17 16:49:02,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:02,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:49:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:49:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:49:02,074 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-17 16:49:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:03,255 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2022-03-17 16:49:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 16:49:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2022-03-17 16:49:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:03,257 INFO L225 Difference]: With dead ends: 251 [2022-03-17 16:49:03,257 INFO L226 Difference]: Without dead ends: 229 [2022-03-17 16:49:03,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:49:03,258 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:03,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-17 16:49:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-17 16:49:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-03-17 16:49:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.126865671641791) internal successors, (151), 142 states have internal predecessors, (151), 47 states have call successors, (47), 29 states have call predecessors, (47), 28 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 16:49:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-03-17 16:49:03,268 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 47 [2022-03-17 16:49:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:03,268 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-03-17 16:49:03,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-17 16:49:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-03-17 16:49:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 16:49:03,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:03,269 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:03,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:03,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 16:49:03,492 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2022-03-17 16:49:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:03,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479852266] [2022-03-17 16:49:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:03,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:03,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:03,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622081713] [2022-03-17 16:49:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:03,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:03,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:03,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:03,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 16:49:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:49:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 16:49:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 16:49:03,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-17 16:49:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:03,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479852266] [2022-03-17 16:49:03,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:03,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622081713] [2022-03-17 16:49:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622081713] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:49:03,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:49:03,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-17 16:49:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062513742] [2022-03-17 16:49:03,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:49:03,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:49:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:49:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:49:03,953 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 16:49:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:03,984 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2022-03-17 16:49:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:49:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-03-17 16:49:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:03,986 INFO L225 Difference]: With dead ends: 214 [2022-03-17 16:49:03,986 INFO L226 Difference]: Without dead ends: 192 [2022-03-17 16:49:03,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:49:03,987 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:03,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:49:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-17 16:49:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-03-17 16:49:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-17 16:49:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2022-03-17 16:49:03,994 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 61 [2022-03-17 16:49:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:03,994 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2022-03-17 16:49:03,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 16:49:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2022-03-17 16:49:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-17 16:49:03,996 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:03,996 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:04,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:04,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:04,212 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 2 times [2022-03-17 16:49:04,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:04,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312889086] [2022-03-17 16:49:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:04,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:04,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:04,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591458437] [2022-03-17 16:49:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:49:04,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:04,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:04,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:04,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 16:49:04,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 16:49:04,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:49:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 16:49:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 16:49:04,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-17 16:49:04,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312889086] [2022-03-17 16:49:04,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591458437] [2022-03-17 16:49:04,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591458437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:04,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:04,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 16:49:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351295604] [2022-03-17 16:49:04,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:04,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 16:49:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:04,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 16:49:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-17 16:49:04,782 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-17 16:49:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:05,027 INFO L93 Difference]: Finished difference Result 507 states and 572 transitions. [2022-03-17 16:49:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 16:49:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 99 [2022-03-17 16:49:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:05,031 INFO L225 Difference]: With dead ends: 507 [2022-03-17 16:49:05,031 INFO L226 Difference]: Without dead ends: 507 [2022-03-17 16:49:05,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-17 16:49:05,032 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 94 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:05,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 230 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 16:49:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-17 16:49:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-03-17 16:49:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 335 states have (on average 1.0955223880597016) internal successors, (367), 345 states have internal predecessors, (367), 104 states have call successors, (104), 68 states have call predecessors, (104), 67 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-17 16:49:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 572 transitions. [2022-03-17 16:49:05,049 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 572 transitions. Word has length 99 [2022-03-17 16:49:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:05,050 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 572 transitions. [2022-03-17 16:49:05,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-17 16:49:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 572 transitions. [2022-03-17 16:49:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-17 16:49:05,054 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:05,054 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:05,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:05,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 16:49:05,267 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1084056642, now seen corresponding path program 3 times [2022-03-17 16:49:05,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:05,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066157548] [2022-03-17 16:49:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:05,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:05,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410630765] [2022-03-17 16:49:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 16:49:05,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:05,282 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:05,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 16:49:05,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-03-17 16:49:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:49:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 16:49:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-17 16:49:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-17 16:49:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066157548] [2022-03-17 16:49:06,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410630765] [2022-03-17 16:49:06,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410630765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:06,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:06,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-17 16:49:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737699179] [2022-03-17 16:49:06,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:06,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 16:49:06,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 16:49:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-17 16:49:06,393 INFO L87 Difference]: Start difference. First operand 507 states and 572 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-17 16:49:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:07,045 INFO L93 Difference]: Finished difference Result 1143 states and 1292 transitions. [2022-03-17 16:49:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-17 16:49:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 213 [2022-03-17 16:49:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:07,053 INFO L225 Difference]: With dead ends: 1143 [2022-03-17 16:49:07,053 INFO L226 Difference]: Without dead ends: 1143 [2022-03-17 16:49:07,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-17 16:49:07,055 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 323 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:07,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 354 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 16:49:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-03-17 16:49:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2022-03-17 16:49:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 755 states have (on average 1.0900662251655628) internal successors, (823), 777 states have internal predecessors, (823), 236 states have call successors, (236), 152 states have call predecessors, (236), 151 states have return successors, (233), 213 states have call predecessors, (233), 233 states have call successors, (233) [2022-03-17 16:49:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1292 transitions. [2022-03-17 16:49:07,119 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1292 transitions. Word has length 213 [2022-03-17 16:49:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:07,120 INFO L478 AbstractCegarLoop]: Abstraction has 1143 states and 1292 transitions. [2022-03-17 16:49:07,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-17 16:49:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1292 transitions. [2022-03-17 16:49:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-03-17 16:49:07,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:07,132 INFO L500 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:07,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:07,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 16:49:07,336 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -597128254, now seen corresponding path program 4 times [2022-03-17 16:49:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:07,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403187497] [2022-03-17 16:49:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:07,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:07,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833779796] [2022-03-17 16:49:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 16:49:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:07,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:07,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 16:49:07,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 16:49:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:49:07,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-17 16:49:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:49:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-17 16:49:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:49:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-17 16:49:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:49:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403187497] [2022-03-17 16:49:09,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:49:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833779796] [2022-03-17 16:49:09,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833779796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:49:09,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:49:09,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-17 16:49:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619959251] [2022-03-17 16:49:09,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:49:09,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-17 16:49:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:49:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-17 16:49:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 16:49:09,870 INFO L87 Difference]: Start difference. First operand 1143 states and 1292 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-17 16:49:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:49:11,634 INFO L93 Difference]: Finished difference Result 2415 states and 2732 transitions. [2022-03-17 16:49:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-17 16:49:11,640 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 441 [2022-03-17 16:49:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:49:11,653 INFO L225 Difference]: With dead ends: 2415 [2022-03-17 16:49:11,653 INFO L226 Difference]: Without dead ends: 2415 [2022-03-17 16:49:11,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-17 16:49:11,656 INFO L912 BasicCegarLoop]: 167 mSDtfsCounter, 651 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 16:49:11,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 848 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 16:49:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2022-03-17 16:49:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2022-03-17 16:49:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 1595 states have (on average 1.0877742946708464) internal successors, (1735), 1641 states have internal predecessors, (1735), 500 states have call successors, (500), 320 states have call predecessors, (500), 319 states have return successors, (497), 453 states have call predecessors, (497), 497 states have call successors, (497) [2022-03-17 16:49:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2732 transitions. [2022-03-17 16:49:11,718 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2732 transitions. Word has length 441 [2022-03-17 16:49:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:49:11,719 INFO L478 AbstractCegarLoop]: Abstraction has 2415 states and 2732 transitions. [2022-03-17 16:49:11,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-17 16:49:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2732 transitions. [2022-03-17 16:49:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-03-17 16:49:11,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:49:11,745 INFO L500 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:49:11,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 16:49:11,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 16:49:11,958 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:49:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:49:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -806774078, now seen corresponding path program 5 times [2022-03-17 16:49:11,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:49:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484409966] [2022-03-17 16:49:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:49:11,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:49:12,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:49:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058342304] [2022-03-17 16:49:12,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 16:49:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:49:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:49:12,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:49:12,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 16:59:52,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2022-03-17 16:59:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:59:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-17 16:59:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:59:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-17 16:59:55,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:59:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-03-17 16:59:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:59:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484409966] [2022-03-17 16:59:58,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:59:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058342304] [2022-03-17 16:59:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058342304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:59:58,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:59:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-17 16:59:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143310137] [2022-03-17 16:59:58,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:59:58,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-17 16:59:58,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:59:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-17 16:59:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-17 16:59:58,510 INFO L87 Difference]: Start difference. First operand 2415 states and 2732 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) [2022-03-17 17:00:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:00:04,480 INFO L93 Difference]: Finished difference Result 4959 states and 5612 transitions. [2022-03-17 17:00:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-17 17:00:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) Word has length 897 [2022-03-17 17:00:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:00:04,501 INFO L225 Difference]: With dead ends: 4959 [2022-03-17 17:00:04,502 INFO L226 Difference]: Without dead ends: 4959 [2022-03-17 17:00:04,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1886 GetRequests, 1697 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-03-17 17:00:04,510 INFO L912 BasicCegarLoop]: 311 mSDtfsCounter, 1689 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 1182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 17:00:04,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 1548 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1182 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-17 17:00:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-03-17 17:00:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4959. [2022-03-17 17:00:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 3275 states have (on average 1.0867175572519083) internal successors, (3559), 3369 states have internal predecessors, (3559), 1028 states have call successors, (1028), 656 states have call predecessors, (1028), 655 states have return successors, (1025), 933 states have call predecessors, (1025), 1025 states have call successors, (1025) [2022-03-17 17:00:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 5612 transitions. [2022-03-17 17:00:04,626 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 5612 transitions. Word has length 897 [2022-03-17 17:00:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:00:04,627 INFO L478 AbstractCegarLoop]: Abstraction has 4959 states and 5612 transitions. [2022-03-17 17:00:04,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) [2022-03-17 17:00:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 5612 transitions. [2022-03-17 17:00:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1810 [2022-03-17 17:00:04,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:00:04,716 INFO L500 BasicCegarLoop]: trace histogram [283, 282, 282, 95, 94, 94, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:00:04,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 17:00:04,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 17:00:04,927 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:00:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:00:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1393998018, now seen corresponding path program 6 times [2022-03-17 17:00:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:00:04,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669307633] [2022-03-17 17:00:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:00:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:00:04,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:00:04,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838509043] [2022-03-17 17:00:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 17:00:04,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:00:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:00:04,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:00:04,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process