/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/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:13:38,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:13:38,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:13:38,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:13:38,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:13:38,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:13:38,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:13:38,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:13:38,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:13:38,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:13:38,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:13:38,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:13:38,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:13:38,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:13:38,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:13:38,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:13:38,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:13:38,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:13:38,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:13:38,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:13:38,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:13:38,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:13:38,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:13:38,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:13:38,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:13:38,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:13:38,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:13:38,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:13:38,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:13:38,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:13:38,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:13:38,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:13:38,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:13:38,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:13:38,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:13:38,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:13:38,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:13:38,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:13:38,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:13:38,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:13:38,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:13:38,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:13:38,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:13:38,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:13:38,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:13:38,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:13:38,368 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:13:38,368 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:13:38,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:13:38,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:13:38,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:13:38,571 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:13:38,572 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:13:38,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-02-23 18:13:38,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64993b102/531f02829960446ca0fb0212bfc1a011/FLAGa3e1e3462 [2022-02-23 18:13:38,957 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:13:38,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-02-23 18:13:38,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64993b102/531f02829960446ca0fb0212bfc1a011/FLAGa3e1e3462 [2022-02-23 18:13:39,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64993b102/531f02829960446ca0fb0212bfc1a011 [2022-02-23 18:13:39,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:13:39,365 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:13:39,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:13:39,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:13:39,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:13:39,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4774b0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39, skipping insertion in model container [2022-02-23 18:13:39,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:13:39,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:13:39,530 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/egcd3-ll_valuebound20.c[490,503] [2022-02-23 18:13:39,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:13:39,580 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:13:39,607 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/egcd3-ll_valuebound20.c[490,503] [2022-02-23 18:13:39,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:13:39,650 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:13:39,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39 WrapperNode [2022-02-23 18:13:39,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:13:39,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:13:39,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:13:39,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:13:39,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:13:39,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:13:39,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:13:39,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:13:39,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:13:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:39,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 18:13:39,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:13:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:13:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:13:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:13:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:13:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:13:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:13:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:13:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:13:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:13:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:13:39,828 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:13:39,829 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:13:39,932 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:13:39,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:13:39,936 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:13:39,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:13:39 BoogieIcfgContainer [2022-02-23 18:13:39,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:13:39,938 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:13:39,938 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:13:39,939 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:13:39,941 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:13:39" (1/1) ... [2022-02-23 18:13:39,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:13:39 BasicIcfg [2022-02-23 18:13:39,954 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:13:39,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:13:39,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:13:39,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:13:39,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:13:39" (1/4) ... [2022-02-23 18:13:39,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1ec952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:13:39, skipping insertion in model container [2022-02-23 18:13:39,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:13:39" (2/4) ... [2022-02-23 18:13:39,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1ec952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:13:39, skipping insertion in model container [2022-02-23 18:13:39,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:13:39" (3/4) ... [2022-02-23 18:13:39,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1ec952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:13:39, skipping insertion in model container [2022-02-23 18:13:39,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:13:39" (4/4) ... [2022-02-23 18:13:39,960 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.cJordan [2022-02-23 18:13:39,963 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:13:39,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:13:40,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:13:40,032 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 18:13:40,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:13:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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) [2022-02-23 18:13:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 18:13:40,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:40,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:40,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-23 18:13:40,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:40,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266043446] [2022-02-23 18:13:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:40,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:13:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:13:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:13:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:13:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 18:13:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:40,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:40,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266043446] [2022-02-23 18:13:40,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266043446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:40,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:40,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:13:40,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241244350] [2022-02-23 18:13:40,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:40,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:13:40,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:13:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:13:40,246 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:13:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:40,331 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-02-23 18:13:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:13:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 18:13:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:40,344 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:13:40,344 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 18:13:40,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:13:40,351 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:40,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:13:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 18:13:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 18:13:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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) [2022-02-23 18:13:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 18:13:40,391 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-23 18:13:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:40,392 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 18:13:40,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:13:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 18:13:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 18:13:40,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:40,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:40,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:13:40,395 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-23 18:13:40,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:40,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133570127] [2022-02-23 18:13:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:40,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:40,440 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:40,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341931884] [2022-02-23 18:13:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:40,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:40,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:13:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:13:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:13:40,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:13:40,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:40,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133570127] [2022-02-23 18:13:40,641 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:40,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341931884] [2022-02-23 18:13:40,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341931884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:40,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:40,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:13:40,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132232509] [2022-02-23 18:13:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:13:40,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:13:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:13:40,643 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:40,716 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-23 18:13:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:13:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-23 18:13:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:40,718 INFO L225 Difference]: With dead ends: 47 [2022-02-23 18:13:40,718 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 18:13:40,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:13:40,719 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:40,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:13:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 18:13:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-23 18:13:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-02-23 18:13:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-23 18:13:40,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-23 18:13:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:40,727 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-23 18:13:40,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-23 18:13:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 18:13:40,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:40,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:40,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:40,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:40,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-23 18:13:40,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:40,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014682503] [2022-02-23 18:13:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:40,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:40,959 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:40,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031139155] [2022-02-23 18:13:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:40,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:41,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:13:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:13:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:13:41,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:41,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:41,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014682503] [2022-02-23 18:13:41,306 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:41,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031139155] [2022-02-23 18:13:41,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031139155] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:13:41,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:13:41,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:13:41,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795097415] [2022-02-23 18:13:41,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:41,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:13:41,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:13:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:13:41,307 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:41,332 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-02-23 18:13:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:13:41,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-23 18:13:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:41,334 INFO L225 Difference]: With dead ends: 51 [2022-02-23 18:13:41,334 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 18:13:41,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:13:41,335 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:41,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:13:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 18:13:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 18:13:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 18:13:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 18:13:41,340 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-23 18:13:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:41,340 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 18:13:41,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 18:13:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 18:13:41,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:41,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:41,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:41,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 18:13:41,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-23 18:13:41,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:41,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106613982] [2022-02-23 18:13:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:41,571 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:41,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347958963] [2022-02-23 18:13:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:41,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:41,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:41,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:41,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:13:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:13:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:13:41,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:13:41,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:41,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106613982] [2022-02-23 18:13:41,909 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:41,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347958963] [2022-02-23 18:13:41,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347958963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:41,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:41,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:13:41,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279474362] [2022-02-23 18:13:41,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:41,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:13:41,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:13:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:13:41,910 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:13:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:42,008 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-02-23 18:13:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:13:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-23 18:13:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:42,009 INFO L225 Difference]: With dead ends: 96 [2022-02-23 18:13:42,009 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 18:13:42,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:13:42,010 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:42,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:13:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 18:13:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-23 18:13:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 18:13:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-23 18:13:42,017 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-23 18:13:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:42,017 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-23 18:13:42,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:13:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-23 18:13:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:13:42,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:42,018 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:42,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 18:13:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:42,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-23 18:13:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941748886] [2022-02-23 18:13:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:42,246 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:42,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108072050] [2022-02-23 18:13:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:42,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:42,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:13:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:13:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:13:42,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:42,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:42,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941748886] [2022-02-23 18:13:42,707 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:42,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108072050] [2022-02-23 18:13:42,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108072050] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:13:42,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:13:42,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-23 18:13:42,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882986111] [2022-02-23 18:13:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:42,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:13:42,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:13:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:13:42,708 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-02-23 18:13:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:42,753 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-02-23 18:13:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:13:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 [2022-02-23 18:13:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:42,754 INFO L225 Difference]: With dead ends: 77 [2022-02-23 18:13:42,754 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 18:13:42,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:13:42,755 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:42,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:13:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 18:13:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 18:13:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 18:13:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-23 18:13:42,760 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-23 18:13:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:42,761 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-23 18:13:42,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-02-23 18:13:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-23 18:13:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:13:42,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:42,761 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-02-23 18:13:42,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:42,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:42,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-23 18:13:42,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:42,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952821967] [2022-02-23 18:13:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:42,998 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:42,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621940696] [2022-02-23 18:13:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:42,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:43,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:43,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:13:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:43,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 18:13:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:13:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:43,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:43,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952821967] [2022-02-23 18:13:43,501 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:43,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621940696] [2022-02-23 18:13:43,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621940696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:43,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:43,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-23 18:13:43,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894114086] [2022-02-23 18:13:43,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:13:43,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:13:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:13:43,503 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:13:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:43,840 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-02-23 18:13:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:13:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-23 18:13:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:43,841 INFO L225 Difference]: With dead ends: 116 [2022-02-23 18:13:43,841 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 18:13:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-23 18:13:43,842 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:43,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 370 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:13:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 18:13:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-23 18:13:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 18:13:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-23 18:13:43,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-23 18:13:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:43,851 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-23 18:13:43,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:13:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-23 18:13:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:13:43,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:43,852 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:43,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 18:13:44,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:44,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-23 18:13:44,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:44,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715666077] [2022-02-23 18:13:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:44,079 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:44,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604467495] [2022-02-23 18:13:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:44,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:44,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:13:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:13:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 18:13:44,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:13:44,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:44,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715666077] [2022-02-23 18:13:44,204 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:44,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604467495] [2022-02-23 18:13:44,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604467495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:44,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:44,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:13:44,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677248694] [2022-02-23 18:13:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:44,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:13:44,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:13:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:13:44,206 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:13:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:44,234 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-02-23 18:13:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:13:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-23 18:13:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:44,236 INFO L225 Difference]: With dead ends: 149 [2022-02-23 18:13:44,236 INFO L226 Difference]: Without dead ends: 149 [2022-02-23 18:13:44,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:13:44,236 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:44,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:13:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-23 18:13:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-23 18:13:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-23 18:13:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-23 18:13:44,246 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-23 18:13:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-23 18:13:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:13:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-23 18:13:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:13:44,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:44,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:44,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:44,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-23 18:13:44,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:44,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784190542] [2022-02-23 18:13:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:44,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:44,495 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:44,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112036413] [2022-02-23 18:13:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:44,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:44,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:13:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 18:13:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:13:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:44,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:44,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784190542] [2022-02-23 18:13:44,991 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:44,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112036413] [2022-02-23 18:13:44,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112036413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:44,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:44,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-02-23 18:13:44,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467377570] [2022-02-23 18:13:44,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 18:13:44,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 18:13:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:13:44,993 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:13:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:47,574 INFO L93 Difference]: Finished difference Result 188 states and 263 transitions. [2022-02-23 18:13:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:13:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-02-23 18:13:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:47,579 INFO L225 Difference]: With dead ends: 188 [2022-02-23 18:13:47,579 INFO L226 Difference]: Without dead ends: 188 [2022-02-23 18:13:47,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 18:13:47,580 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:47,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 344 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 18:13:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-23 18:13:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-23 18:13:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 18:13:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-02-23 18:13:47,603 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-02-23 18:13:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:47,604 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-02-23 18:13:47,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:13:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-02-23 18:13:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:13:47,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:47,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:47,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:47,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:47,806 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-23 18:13:47,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:47,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807180730] [2022-02-23 18:13:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:47,824 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:47,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886140250] [2022-02-23 18:13:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:13:47,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:47,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:47,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:13:47,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:13:47,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:13:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:13:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:13:47,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:13:47,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:47,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807180730] [2022-02-23 18:13:47,951 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:47,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886140250] [2022-02-23 18:13:47,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886140250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:47,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:47,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:13:47,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968145891] [2022-02-23 18:13:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:47,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:13:47,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:13:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:13:47,952 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:48,029 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2022-02-23 18:13:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:13:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-23 18:13:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:48,031 INFO L225 Difference]: With dead ends: 144 [2022-02-23 18:13:48,031 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 18:13:48,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:13:48,032 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:48,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:13:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 18:13:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-02-23 18:13:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 18:13:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-02-23 18:13:48,053 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-02-23 18:13:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:48,055 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-02-23 18:13:48,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:13:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-02-23 18:13:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-23 18:13:48,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:48,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:48,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:48,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 18:13:48,272 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-23 18:13:48,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:48,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369345379] [2022-02-23 18:13:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:48,281 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:48,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279146663] [2022-02-23 18:13:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:48,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:48,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:13:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:13:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 18:13:48,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:13:48,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:48,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369345379] [2022-02-23 18:13:48,438 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:48,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279146663] [2022-02-23 18:13:48,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279146663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:48,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:48,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:13:48,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978351913] [2022-02-23 18:13:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:13:48,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:48,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:13:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:13:48,440 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 18:13:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:48,473 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-02-23 18:13:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:13:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-23 18:13:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:48,475 INFO L225 Difference]: With dead ends: 165 [2022-02-23 18:13:48,475 INFO L226 Difference]: Without dead ends: 165 [2022-02-23 18:13:48,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:13:48,475 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:48,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:13:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-23 18:13:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-02-23 18:13:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 18:13:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-02-23 18:13:48,482 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-02-23 18:13:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:48,482 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-02-23 18:13:48,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 18:13:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-02-23 18:13:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 18:13:48,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:48,484 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:48,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 18:13:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 18:13:48,707 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-23 18:13:48,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:48,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922366551] [2022-02-23 18:13:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:48,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:48,717 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:48,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851468438] [2022-02-23 18:13:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:48,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:48,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:48,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:13:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-23 18:13:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 18:13:49,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 18:13:49,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:49,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922366551] [2022-02-23 18:13:49,753 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:49,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851468438] [2022-02-23 18:13:49,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851468438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:49,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:49,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-02-23 18:13:49,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018022698] [2022-02-23 18:13:49,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:49,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 18:13:49,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 18:13:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:13:49,754 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:13:54,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:57,006 INFO L93 Difference]: Finished difference Result 292 states and 424 transitions. [2022-02-23 18:13:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 18:13:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-02-23 18:13:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:57,009 INFO L225 Difference]: With dead ends: 292 [2022-02-23 18:13:57,009 INFO L226 Difference]: Without dead ends: 290 [2022-02-23 18:13:57,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 18:13:57,010 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 136 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:57,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 424 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-23 18:13:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-23 18:13:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-02-23 18:13:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:13:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-02-23 18:13:57,021 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-02-23 18:13:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:57,021 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-02-23 18:13:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:13:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-02-23 18:13:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 18:13:57,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:57,023 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:57,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 18:13:57,244 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-23 18:13:57,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:57,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039596361] [2022-02-23 18:13:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:57,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:57,253 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:57,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968857335] [2022-02-23 18:13:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:57,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:57,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:57,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:13:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 18:13:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-23 18:13:57,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-23 18:13:57,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:57,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039596361] [2022-02-23 18:13:57,674 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:57,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968857335] [2022-02-23 18:13:57,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968857335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:57,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:57,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-02-23 18:13:57,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722162670] [2022-02-23 18:13:57,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:57,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:13:57,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:13:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:13:57,675 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:13:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:57,871 INFO L93 Difference]: Finished difference Result 345 states and 500 transitions. [2022-02-23 18:13:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:13:57,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-02-23 18:13:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:57,874 INFO L225 Difference]: With dead ends: 345 [2022-02-23 18:13:57,874 INFO L226 Difference]: Without dead ends: 345 [2022-02-23 18:13:57,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:13:57,875 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:57,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 244 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:13:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-23 18:13:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-02-23 18:13:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:13:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-02-23 18:13:57,891 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-02-23 18:13:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:57,892 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-02-23 18:13:57,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:13:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-02-23 18:13:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-23 18:13:57,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:57,893 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:57,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 18:13:58,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 18:13:58,094 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-23 18:13:58,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:58,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776500410] [2022-02-23 18:13:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:58,105 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:58,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606702481] [2022-02-23 18:13:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:58,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:58,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:58,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:13:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 18:13:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 18:13:58,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 18:13:58,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:58,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776500410] [2022-02-23 18:13:58,656 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:58,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606702481] [2022-02-23 18:13:58,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606702481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:58,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:58,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-23 18:13:58,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098398501] [2022-02-23 18:13:58,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:13:58,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:13:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:13:58,658 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:13:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:59,005 INFO L93 Difference]: Finished difference Result 321 states and 451 transitions. [2022-02-23 18:13:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:13:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-02-23 18:13:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:59,008 INFO L225 Difference]: With dead ends: 321 [2022-02-23 18:13:59,008 INFO L226 Difference]: Without dead ends: 321 [2022-02-23 18:13:59,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:13:59,008 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:59,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 302 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:13:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-23 18:13:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-02-23 18:13:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:13:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-02-23 18:13:59,018 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-02-23 18:13:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:59,018 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-02-23 18:13:59,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:13:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-02-23 18:13:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 18:13:59,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:59,019 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:59,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:59,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 18:13:59,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-02-23 18:13:59,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:59,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326667305] [2022-02-23 18:13:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:59,250 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:59,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314592766] [2022-02-23 18:13:59,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:13:59,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:59,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:59,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:13:59,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:13:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:13:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:13:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:13:59,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:13:59,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:59,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326667305] [2022-02-23 18:13:59,426 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:59,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314592766] [2022-02-23 18:13:59,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314592766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:13:59,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:13:59,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:13:59,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518603430] [2022-02-23 18:13:59,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:13:59,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:13:59,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:13:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:13:59,428 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 18:13:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:59,466 INFO L93 Difference]: Finished difference Result 264 states and 348 transitions. [2022-02-23 18:13:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:13:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-02-23 18:13:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:59,468 INFO L225 Difference]: With dead ends: 264 [2022-02-23 18:13:59,468 INFO L226 Difference]: Without dead ends: 264 [2022-02-23 18:13:59,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:13:59,469 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:59,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:13:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-23 18:13:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-02-23 18:13:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-23 18:13:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-02-23 18:13:59,476 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-02-23 18:13:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:59,476 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-02-23 18:13:59,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 18:13:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-02-23 18:13:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 18:13:59,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:59,478 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:59,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:59,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 18:13:59,700 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-02-23 18:13:59,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:59,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251823913] [2022-02-23 18:13:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:59,709 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:59,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790532598] [2022-02-23 18:13:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:13:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:59,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:59,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:13:59,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:13:59,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:13:59,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-23 18:13:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:14:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 18:14:00,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:14:02,262 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:14:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 18:14:09,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:14:09,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251823913] [2022-02-23 18:14:09,412 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:14:09,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790532598] [2022-02-23 18:14:09,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790532598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:14:09,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:14:09,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-02-23 18:14:09,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792620234] [2022-02-23 18:14:09,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:14:09,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 18:14:09,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:14:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 18:14:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-02-23 18:14:09,414 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:14:23,612 WARN L232 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 97 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:14:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:14:26,744 INFO L93 Difference]: Finished difference Result 313 states and 414 transitions. [2022-02-23 18:14:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-23 18:14:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-02-23 18:14:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:14:26,746 INFO L225 Difference]: With dead ends: 313 [2022-02-23 18:14:26,746 INFO L226 Difference]: Without dead ends: 313 [2022-02-23 18:14:26,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=449, Invalid=2520, Unknown=1, NotChecked=0, Total=2970 [2022-02-23 18:14:26,748 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:14:26,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 494 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 450 Invalid, 0 Unknown, 95 Unchecked, 2.1s Time] [2022-02-23 18:14:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-23 18:14:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 299. [2022-02-23 18:14:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 192 states have (on average 1.15625) internal successors, (222), 194 states have internal predecessors, (222), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 82 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:14:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 390 transitions. [2022-02-23 18:14:26,756 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 390 transitions. Word has length 77 [2022-02-23 18:14:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:14:26,756 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 390 transitions. [2022-02-23 18:14:26,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:14:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 390 transitions. [2022-02-23 18:14:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:14:26,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:14:26,758 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 18:14:26,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:14:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:26,983 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:14:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:14:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-23 18:14:26,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:14:26,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256838241] [2022-02-23 18:14:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:14:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:14:26,994 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:14:26,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146635808] [2022-02-23 18:14:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:14:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:14:26,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:14:26,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:14:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:14:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-02-23 18:14:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:14:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:14:27,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:14:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-23 18:14:29,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:14:29,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256838241] [2022-02-23 18:14:29,122 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:14:29,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146635808] [2022-02-23 18:14:29,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146635808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:14:29,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:14:29,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-02-23 18:14:29,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341621953] [2022-02-23 18:14:29,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:14:29,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 18:14:29,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:14:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 18:14:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:14:29,124 INFO L87 Difference]: Start difference. First operand 299 states and 390 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:14:34,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:36,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:41,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:44,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:48,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:54,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:56,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:58,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:01,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:04,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:08,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:10,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:12,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:14,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:15:15,663 INFO L93 Difference]: Finished difference Result 512 states and 721 transitions. [2022-02-23 18:15:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-23 18:15:15,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-02-23 18:15:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:15:15,665 INFO L225 Difference]: With dead ends: 512 [2022-02-23 18:15:15,665 INFO L226 Difference]: Without dead ends: 510 [2022-02-23 18:15:15,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=699, Invalid=3207, Unknown=0, NotChecked=0, Total=3906 [2022-02-23 18:15:15,666 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 193 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 492 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:15:15,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 630 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 1508 Invalid, 12 Unknown, 0 Unchecked, 41.4s Time] [2022-02-23 18:15:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-23 18:15:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 472. [2022-02-23 18:15:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 271 states have (on average 1.2066420664206643) internal successors, (327), 273 states have internal predecessors, (327), 173 states have call successors, (173), 28 states have call predecessors, (173), 27 states have return successors, (171), 170 states have call predecessors, (171), 171 states have call successors, (171) [2022-02-23 18:15:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 671 transitions. [2022-02-23 18:15:15,677 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 671 transitions. Word has length 91 [2022-02-23 18:15:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:15:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 671 transitions. [2022-02-23 18:15:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:15:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 671 transitions. [2022-02-23 18:15:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 18:15:15,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:15:15,678 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:15:15,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 18:15:15,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 18:15:15,894 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:15:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:15:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-23 18:15:15,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:15:15,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193241276] [2022-02-23 18:15:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:15:15,901 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:15:15,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793689118] [2022-02-23 18:15:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:15,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:15:15,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:15:15,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:15:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:15:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:15:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:15:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 18:15:16,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:15:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 18:15:16,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:15:16,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193241276] [2022-02-23 18:15:16,774 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:15:16,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793689118] [2022-02-23 18:15:16,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793689118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:15:16,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:15:16,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 18:15:16,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742914208] [2022-02-23 18:15:16,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:15:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:15:16,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:15:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:15:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:15:16,775 INFO L87 Difference]: Start difference. First operand 472 states and 671 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:15:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:15:18,320 INFO L93 Difference]: Finished difference Result 1055 states and 1629 transitions. [2022-02-23 18:15:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:15:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-02-23 18:15:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:15:18,325 INFO L225 Difference]: With dead ends: 1055 [2022-02-23 18:15:18,325 INFO L226 Difference]: Without dead ends: 1055 [2022-02-23 18:15:18,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:15:18,325 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 66 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:15:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 694 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 18:15:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-02-23 18:15:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 966. [2022-02-23 18:15:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 472 states have (on average 1.3008474576271187) internal successors, (614), 474 states have internal predecessors, (614), 461 states have call successors, (461), 33 states have call predecessors, (461), 32 states have return successors, (459), 458 states have call predecessors, (459), 459 states have call successors, (459) [2022-02-23 18:15:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1534 transitions. [2022-02-23 18:15:18,347 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1534 transitions. Word has length 94 [2022-02-23 18:15:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:15:18,348 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1534 transitions. [2022-02-23 18:15:18,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:15:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1534 transitions. [2022-02-23 18:15:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 18:15:18,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:15:18,349 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-02-23 18:15:18,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:15:18,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 18:15:18,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:15:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:15:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-23 18:15:18,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:15:18,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236232074] [2022-02-23 18:15:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:15:18,570 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:15:18,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770370920] [2022-02-23 18:15:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:15:18,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:15:18,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:15:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:15:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-23 18:15:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:15:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 18:15:19,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:15:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-23 18:15:20,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:15:20,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236232074] [2022-02-23 18:15:20,872 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:15:20,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770370920] [2022-02-23 18:15:20,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770370920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:15:20,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:15:20,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-02-23 18:15:20,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734705678] [2022-02-23 18:15:20,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:15:20,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 18:15:20,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:15:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 18:15:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-23 18:15:20,873 INFO L87 Difference]: Start difference. First operand 966 states and 1534 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 18:15:24,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:41,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:43,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:45,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:47,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:49,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:52,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:54,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:28,290 WARN L232 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:16:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:40,906 INFO L93 Difference]: Finished difference Result 1246 states and 1974 transitions. [2022-02-23 18:16:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-23 18:16:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-02-23 18:16:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:40,913 INFO L225 Difference]: With dead ends: 1246 [2022-02-23 18:16:40,913 INFO L226 Difference]: Without dead ends: 1246 [2022-02-23 18:16:40,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=796, Invalid=2984, Unknown=2, NotChecked=0, Total=3782 [2022-02-23 18:16:40,916 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 126 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 325 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:40,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 665 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1272 Invalid, 7 Unknown, 0 Unchecked, 40.8s Time] [2022-02-23 18:16:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-02-23 18:16:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1009. [2022-02-23 18:16:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 500 states have (on average 1.292) internal successors, (646), 502 states have internal predecessors, (646), 473 states have call successors, (473), 36 states have call predecessors, (473), 35 states have return successors, (471), 470 states have call predecessors, (471), 471 states have call successors, (471) [2022-02-23 18:16:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1590 transitions. [2022-02-23 18:16:40,953 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1590 transitions. Word has length 94 [2022-02-23 18:16:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:40,954 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1590 transitions. [2022-02-23 18:16:40,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 18:16:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1590 transitions. [2022-02-23 18:16:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-23 18:16:40,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:40,955 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2022-02-23 18:16:40,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:41,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 18:16:41,156 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-02-23 18:16:41,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:41,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778346426] [2022-02-23 18:16:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:41,164 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:41,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977888384] [2022-02-23 18:16:41,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:41,179 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:41,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 18:16:41,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:41,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:41,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 18:16:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 18:16:41,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 18:16:41,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:41,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778346426] [2022-02-23 18:16:41,708 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:41,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977888384] [2022-02-23 18:16:41,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977888384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:41,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:41,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-02-23 18:16:41,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615629012] [2022-02-23 18:16:41,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:41,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:16:41,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:16:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:16:41,710 INFO L87 Difference]: Start difference. First operand 1009 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:16:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:42,181 INFO L93 Difference]: Finished difference Result 1217 states and 1922 transitions. [2022-02-23 18:16:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:16:42,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-02-23 18:16:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:42,188 INFO L225 Difference]: With dead ends: 1217 [2022-02-23 18:16:42,188 INFO L226 Difference]: Without dead ends: 1217 [2022-02-23 18:16:42,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-02-23 18:16:42,188 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:42,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:16:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-23 18:16:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 978. [2022-02-23 18:16:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 477 states have (on average 1.2976939203354299) internal successors, (619), 479 states have internal predecessors, (619), 465 states have call successors, (465), 36 states have call predecessors, (465), 35 states have return successors, (463), 462 states have call predecessors, (463), 463 states have call successors, (463) [2022-02-23 18:16:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1547 transitions. [2022-02-23 18:16:42,217 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1547 transitions. Word has length 99 [2022-02-23 18:16:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:42,217 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1547 transitions. [2022-02-23 18:16:42,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:16:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1547 transitions. [2022-02-23 18:16:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-23 18:16:42,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:42,219 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1] [2022-02-23 18:16:42,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:42,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:42,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 4 times [2022-02-23 18:16:42,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:42,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256630537] [2022-02-23 18:16:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:42,452 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:42,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801925507] [2022-02-23 18:16:42,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:16:42,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:42,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:42,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 18:16:42,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:16:42,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 87 conjunts are in the unsatisfiable core [2022-02-23 18:16:42,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:42,890 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:16:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 35 proven. 83 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-23 18:16:43,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-23 18:16:43,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:43,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256630537] [2022-02-23 18:16:43,988 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:43,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801925507] [2022-02-23 18:16:43,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801925507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:43,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:43,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-02-23 18:16:43,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395043636] [2022-02-23 18:16:43,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:43,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:16:43,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:16:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-23 18:16:43,990 INFO L87 Difference]: Start difference. First operand 978 states and 1547 transitions. Second operand has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:16:46,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:48,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:50,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:55,180 INFO L93 Difference]: Finished difference Result 1175 states and 1860 transitions. [2022-02-23 18:16:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 18:16:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) Word has length 102 [2022-02-23 18:16:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:55,186 INFO L225 Difference]: With dead ends: 1175 [2022-02-23 18:16:55,186 INFO L226 Difference]: Without dead ends: 1175 [2022-02-23 18:16:55,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 18:16:55,187 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 100 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 230 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:55,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 541 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 747 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2022-02-23 18:16:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-02-23 18:16:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1155. [2022-02-23 18:16:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 558 states have (on average 1.3046594982078854) internal successors, (728), 560 states have internal predecessors, (728), 557 states have call successors, (557), 40 states have call predecessors, (557), 39 states have return successors, (555), 554 states have call predecessors, (555), 555 states have call successors, (555) [2022-02-23 18:16:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1840 transitions. [2022-02-23 18:16:55,221 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1840 transitions. Word has length 102 [2022-02-23 18:16:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:55,221 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1840 transitions. [2022-02-23 18:16:55,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:16:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1840 transitions. [2022-02-23 18:16:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 18:16:55,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:55,224 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-23 18:16:55,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:55,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:55,446 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -439137229, now seen corresponding path program 2 times [2022-02-23 18:16:55,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:55,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308328622] [2022-02-23 18:16:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:55,454 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:55,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846591135] [2022-02-23 18:16:55,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:55,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:55,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:55,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:55,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 18:16:55,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:55,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 90 conjunts are in the unsatisfiable core [2022-02-23 18:16:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:57,042 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:16:57,045 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:17:03,580 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0))) (and (= (+ .cse0 .cse1 c_main_~y~0) c_main_~x~0) (let ((.cse5 (* c_main_~p~0 c_main_~x~0 0)) (.cse4 (* c_main_~r~0 c_main_~y~0 0))) (let ((.cse14 (= c_main_~p~0 0)) (.cse2 (+ (* 2 .cse1) (* 2 .cse0))) (.cse8 (+ c_main_~b~0 (* .cse0 4) (* .cse1 4))) (.cse9 (* 2 .cse4)) (.cse10 (* 2 .cse5)) (.cse11 (* c_main_~q~0 c_main_~x~0)) (.cse12 (* c_main_~s~0 c_main_~y~0)) (.cse13 (= (mod (* c_main_~q~0 3) 4) 0)) (.cse15 (div (- c_main_~q~0) 4))) (or (let ((.cse7 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (let ((.cse6 (* .cse7 c_main_~r~0 c_main_~y~0)) (.cse3 (* .cse7 c_main_~p~0 c_main_~x~0))) (and (= .cse2 (+ (* .cse3 2) .cse4 .cse5 (* 2 .cse6))) (= (+ c_main_~s~0 (* 4 (* .cse7 c_main_~r~0))) 1) (= .cse8 (+ .cse9 .cse10 .cse11 (* .cse6 4) .cse12 (* .cse3 4))) .cse13 (not .cse14) (= (mod .cse15 c_main_~p~0) 0)))) (and .cse14 (let ((.cse16 (= 0 (mod (+ (* c_main_~s~0 3) 1) 4))) (.cse18 (= c_main_~r~0 0)) (.cse17 (div (+ (* (- 1) c_main_~s~0) 1) 4))) (or (let ((.cse21 (div .cse17 c_main_~r~0))) (let ((.cse20 (* .cse21 c_main_~p~0 c_main_~x~0)) (.cse19 (* .cse21 c_main_~r~0 c_main_~y~0))) (and .cse16 (= (mod .cse17 c_main_~r~0) 0) (not .cse18) (= .cse2 (+ (* .cse19 2) (* 2 .cse20) .cse4 .cse5)) (= .cse8 (+ .cse9 .cse10 .cse11 .cse12 (* .cse20 4) (* .cse19 4)))))) (and .cse16 .cse18 (= .cse17 0) (exists ((aux_div_aux_div_main_~k~0_17_50 Int)) (= (+ c_main_~b~0 (* (* c_main_~p~0 c_main_~x~0) 4) (* (* c_main_~r~0 c_main_~y~0) 4)) (+ (* 2 (* c_main_~r~0 c_main_~y~0 0)) (* (* aux_div_aux_div_main_~k~0_17_50 c_main_~r~0 c_main_~y~0) 4) (* 2 (* c_main_~p~0 c_main_~x~0 0)) (* (* aux_div_aux_div_main_~k~0_17_50 c_main_~p~0 c_main_~x~0) 4) (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0))))))) .cse13 (= .cse15 0))))) (= (+ .cse0 .cse1) c_main_~a~0))) is different from false [2022-02-23 18:17:47,640 WARN L232 SmtUtils]: Spent 27.21s on a formula simplification. DAG size of input: 92 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:17:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 128 proven. 73 refuted. 0 times theorem prover too weak. 387 trivial. 4 not checked. [2022-02-23 18:17:50,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:17:59,796 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:17:59,797 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:18:03,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:03,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308328622] [2022-02-23 18:18:03,169 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:03,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846591135] [2022-02-23 18:18:03,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846591135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:18:03,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:18:03,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-02-23 18:18:03,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743767978] [2022-02-23 18:18:03,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:18:03,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 18:18:03,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 18:18:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=753, Unknown=5, NotChecked=56, Total=930 [2022-02-23 18:18:03,171 INFO L87 Difference]: Start difference. First operand 1155 states and 1840 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-23 18:18:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:18:06,997 INFO L93 Difference]: Finished difference Result 1229 states and 1936 transitions. [2022-02-23 18:18:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 18:18:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-02-23 18:18:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:18:07,001 INFO L225 Difference]: With dead ends: 1229 [2022-02-23 18:18:07,002 INFO L226 Difference]: Without dead ends: 1224 [2022-02-23 18:18:07,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=172, Invalid=1159, Unknown=5, NotChecked=70, Total=1406 [2022-02-23 18:18:07,003 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 62 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:18:07,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 747 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 933 Invalid, 0 Unknown, 187 Unchecked, 3.0s Time] [2022-02-23 18:18:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-02-23 18:18:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1204. [2022-02-23 18:18:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 583 states have (on average 1.3018867924528301) internal successors, (759), 585 states have internal predecessors, (759), 577 states have call successors, (577), 44 states have call predecessors, (577), 43 states have return successors, (575), 574 states have call predecessors, (575), 575 states have call successors, (575) [2022-02-23 18:18:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1911 transitions. [2022-02-23 18:18:07,063 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1911 transitions. Word has length 138 [2022-02-23 18:18:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:18:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1911 transitions. [2022-02-23 18:18:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-23 18:18:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1911 transitions. [2022-02-23 18:18:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-23 18:18:07,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:18:07,066 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:07,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:07,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 18:18:07,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:18:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:18:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -529470484, now seen corresponding path program 3 times [2022-02-23 18:18:07,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:18:07,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711198073] [2022-02-23 18:18:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:18:07,286 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:18:07,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759165988] [2022-02-23 18:18:07,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:18:07,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:18:07,292 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:18:07,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 18:18:07,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-23 18:18:07,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:18:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 83 conjunts are in the unsatisfiable core [2022-02-23 18:18:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:18:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-02-23 18:18:08,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:18:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-02-23 18:18:12,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:12,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711198073] [2022-02-23 18:18:12,782 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:12,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759165988] [2022-02-23 18:18:12,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759165988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:18:12,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:18:12,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2022-02-23 18:18:12,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329429699] [2022-02-23 18:18:12,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:18:12,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-23 18:18:12,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-23 18:18:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 18:18:12,786 INFO L87 Difference]: Start difference. First operand 1204 states and 1911 transitions. Second operand has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-02-23 18:18:23,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:18:46,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:18:56,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:19:15,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:19:20,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:19:33,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:17,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:20:33,199 INFO L93 Difference]: Finished difference Result 2086 states and 3347 transitions. [2022-02-23 18:20:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-23 18:20:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 141 [2022-02-23 18:20:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:20:33,207 INFO L225 Difference]: With dead ends: 2086 [2022-02-23 18:20:33,207 INFO L226 Difference]: Without dead ends: 2080 [2022-02-23 18:20:33,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=3600, Invalid=19352, Unknown=0, NotChecked=0, Total=22952 [2022-02-23 18:20:33,211 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 407 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 1231 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1231 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:20:33,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1423 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 3043 Invalid, 1 Unknown, 0 Unchecked, 61.5s Time] [2022-02-23 18:20:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2022-02-23 18:20:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1501. [2022-02-23 18:20:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 733 states have (on average 1.3028649386084583) internal successors, (955), 735 states have internal predecessors, (955), 717 states have call successors, (717), 51 states have call predecessors, (717), 50 states have return successors, (715), 714 states have call predecessors, (715), 715 states have call successors, (715) [2022-02-23 18:20:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2387 transitions. [2022-02-23 18:20:33,271 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2387 transitions. Word has length 141 [2022-02-23 18:20:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:20:33,271 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2387 transitions. [2022-02-23 18:20:33,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-02-23 18:20:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2387 transitions. [2022-02-23 18:20:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 18:20:33,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:20:33,273 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:20:33,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-23 18:20:33,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 18:20:33,490 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:20:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:20:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1563309484, now seen corresponding path program 4 times [2022-02-23 18:20:33,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:20:33,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030421296] [2022-02-23 18:20:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:20:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:20:33,497 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:20:33,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403583151] [2022-02-23 18:20:33,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:20:33,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:20:33,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:20:33,499 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:20:33,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 18:20:33,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:20:33,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:20:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 101 conjunts are in the unsatisfiable core [2022-02-23 18:20:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:20:36,175 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:20:36,177 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:20:36,178 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:20:36,182 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:21:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 133 proven. 113 refuted. 2 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-23 18:21:00,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:21:06,224 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:21:07,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:21:07,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030421296] [2022-02-23 18:21:07,856 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:21:07,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403583151] [2022-02-23 18:21:07,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403583151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:21:07,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:21:07,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-02-23 18:21:07,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569081168] [2022-02-23 18:21:07,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:21:07,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:21:07,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:21:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:21:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=822, Unknown=4, NotChecked=0, Total=930 [2022-02-23 18:21:07,858 INFO L87 Difference]: Start difference. First operand 1501 states and 2387 transitions. Second operand has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:21:15,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:21:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:21:16,043 INFO L93 Difference]: Finished difference Result 1730 states and 2753 transitions. [2022-02-23 18:21:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 18:21:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2022-02-23 18:21:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:21:16,050 INFO L225 Difference]: With dead ends: 1730 [2022-02-23 18:21:16,050 INFO L226 Difference]: Without dead ends: 1725 [2022-02-23 18:21:16,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=187, Invalid=1531, Unknown=4, NotChecked=0, Total=1722 [2022-02-23 18:21:16,050 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:21:16,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 935 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1470 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-02-23 18:21:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-02-23 18:21:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1697. [2022-02-23 18:21:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 817 states have (on average 1.3121175030599754) internal successors, (1072), 819 states have internal predecessors, (1072), 825 states have call successors, (825), 55 states have call predecessors, (825), 54 states have return successors, (823), 822 states have call predecessors, (823), 823 states have call successors, (823) [2022-02-23 18:21:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2720 transitions. [2022-02-23 18:21:16,084 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2720 transitions. Word has length 143 [2022-02-23 18:21:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:21:16,084 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2720 transitions. [2022-02-23 18:21:16,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:21:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2720 transitions. [2022-02-23 18:21:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-23 18:21:16,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:21:16,087 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:21:16,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 18:21:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:16,303 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:21:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:21:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 890462806, now seen corresponding path program 5 times [2022-02-23 18:21:16,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:21:16,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366319349] [2022-02-23 18:21:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:21:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:21:16,310 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:21:16,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492726678] [2022-02-23 18:21:16,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:21:16,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:21:16,320 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:21:16,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 18:21:16,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-23 18:21:16,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:21:16,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 94 conjunts are in the unsatisfiable core [2022-02-23 18:21:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:21:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 75 proven. 111 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2022-02-23 18:21:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:21:28,781 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:21:28,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:21:33,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:21:33,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366319349] [2022-02-23 18:21:33,281 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:21:33,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492726678] [2022-02-23 18:21:33,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492726678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:21:33,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:21:33,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-02-23 18:21:33,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128843894] [2022-02-23 18:21:33,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:21:33,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:21:33,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:21:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:21:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1281, Unknown=1, NotChecked=0, Total=1482 [2022-02-23 18:21:33,282 INFO L87 Difference]: Start difference. First operand 1697 states and 2720 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:21:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:21:38,754 INFO L93 Difference]: Finished difference Result 2096 states and 3359 transitions. [2022-02-23 18:21:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 18:21:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-02-23 18:21:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:21:38,769 INFO L225 Difference]: With dead ends: 2096 [2022-02-23 18:21:38,770 INFO L226 Difference]: Without dead ends: 2091 [2022-02-23 18:21:38,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=403, Invalid=2566, Unknown=1, NotChecked=0, Total=2970 [2022-02-23 18:21:38,771 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 103 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-23 18:21:38,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 889 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-23 18:21:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-02-23 18:21:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2060. [2022-02-23 18:21:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 978 states have (on average 1.320040899795501) internal successors, (1291), 980 states have internal predecessors, (1291), 1017 states have call successors, (1017), 65 states have call predecessors, (1017), 64 states have return successors, (1015), 1014 states have call predecessors, (1015), 1015 states have call successors, (1015) [2022-02-23 18:21:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3323 transitions. [2022-02-23 18:21:38,859 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3323 transitions. Word has length 160 [2022-02-23 18:21:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:21:38,859 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3323 transitions. [2022-02-23 18:21:38,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:21:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3323 transitions. [2022-02-23 18:21:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-23 18:21:38,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:21:38,862 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:21:38,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 18:21:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:39,067 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:21:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:21:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1830452208, now seen corresponding path program 6 times [2022-02-23 18:21:39,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:21:39,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007083216] [2022-02-23 18:21:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:21:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:21:39,074 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:21:39,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997190434] [2022-02-23 18:21:39,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:21:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:21:39,075 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:21:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-23 18:21:39,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-02-23 18:21:39,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:21:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjunts are in the unsatisfiable core [2022-02-23 18:21:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:21:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 58 proven. 198 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-02-23 18:21:45,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:22:08,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:22:08,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007083216] [2022-02-23 18:22:08,832 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:22:08,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997190434] [2022-02-23 18:22:08,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997190434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:22:08,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:22:08,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-02-23 18:22:08,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689689784] [2022-02-23 18:22:08,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:22:08,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:22:08,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:22:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:22:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1065, Unknown=3, NotChecked=0, Total=1190 [2022-02-23 18:22:08,834 INFO L87 Difference]: Start difference. First operand 2060 states and 3323 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-23 18:22:47,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:51,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:53,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:04,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:06,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:07,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:24,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:31,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:34,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:38,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:42,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:43,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:23:59,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:24:08,519 WARN L232 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 49 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:24:10,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:24:15,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:24:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:24:31,120 INFO L93 Difference]: Finished difference Result 2758 states and 4453 transitions. [2022-02-23 18:24:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-23 18:24:31,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 168 [2022-02-23 18:24:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:24:31,129 INFO L225 Difference]: With dead ends: 2758 [2022-02-23 18:24:31,129 INFO L226 Difference]: Without dead ends: 2752 [2022-02-23 18:24:31,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 95.5s TimeCoverageRelationStatistics Valid=836, Invalid=5008, Unknown=8, NotChecked=0, Total=5852 [2022-02-23 18:24:31,130 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 134 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 3312 mSolverCounterSat, 427 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3312 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:24:31,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1773 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3312 Invalid, 2 Unknown, 0 Unchecked, 73.7s Time] [2022-02-23 18:24:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-02-23 18:24:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2537. [2022-02-23 18:24:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1194 states have (on average 1.3266331658291457) internal successors, (1584), 1196 states have internal predecessors, (1584), 1269 states have call successors, (1269), 74 states have call predecessors, (1269), 73 states have return successors, (1267), 1266 states have call predecessors, (1267), 1267 states have call successors, (1267) [2022-02-23 18:24:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4120 transitions. [2022-02-23 18:24:31,176 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4120 transitions. Word has length 168 [2022-02-23 18:24:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:24:31,176 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 4120 transitions. [2022-02-23 18:24:31,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-23 18:24:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4120 transitions. [2022-02-23 18:24:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-23 18:24:31,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:24:31,179 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:24:31,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-23 18:24:31,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 18:24:31,385 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:24:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:24:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1169142410, now seen corresponding path program 7 times [2022-02-23 18:24:31,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:24:31,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118381361] [2022-02-23 18:24:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:24:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:24:31,391 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:24:31,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063158775] [2022-02-23 18:24:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 18:24:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:24:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:24:31,393 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:24:31,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-23 18:24:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:24:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 18:24:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:24:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 359 proven. 18 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-02-23 18:24:31,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:24:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 111 proven. 18 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2022-02-23 18:24:31,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:24:31,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118381361] [2022-02-23 18:24:31,922 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:24:31,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063158775] [2022-02-23 18:24:31,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063158775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:24:31,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:24:31,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-02-23 18:24:31,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003812933] [2022-02-23 18:24:31,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:24:31,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 18:24:31,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:24:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 18:24:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:24:31,928 INFO L87 Difference]: Start difference. First operand 2537 states and 4120 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-02-23 18:24:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:24:32,081 INFO L93 Difference]: Finished difference Result 2830 states and 4563 transitions. [2022-02-23 18:24:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:24:32,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 168 [2022-02-23 18:24:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:24:32,096 INFO L225 Difference]: With dead ends: 2830 [2022-02-23 18:24:32,097 INFO L226 Difference]: Without dead ends: 2830 [2022-02-23 18:24:32,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:24:32,097 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:24:32,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 291 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:24:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-02-23 18:24:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2677. [2022-02-23 18:24:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 1288 states have (on average 1.3159937888198758) internal successors, (1695), 1319 states have internal predecessors, (1695), 1316 states have call successors, (1316), 73 states have call predecessors, (1316), 72 states have return successors, (1314), 1284 states have call predecessors, (1314), 1314 states have call successors, (1314) [2022-02-23 18:24:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4325 transitions. [2022-02-23 18:24:32,163 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4325 transitions. Word has length 168 [2022-02-23 18:24:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:24:32,163 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4325 transitions. [2022-02-23 18:24:32,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-02-23 18:24:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4325 transitions. [2022-02-23 18:24:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-23 18:24:32,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:24:32,166 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:24:32,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-23 18:24:32,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-23 18:24:32,402 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:24:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:24:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1323051024, now seen corresponding path program 8 times [2022-02-23 18:24:32,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:24:32,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556851387] [2022-02-23 18:24:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:24:32,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:24:32,408 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:24:32,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646342715] [2022-02-23 18:24:32,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:24:32,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:24:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:24:32,409 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:24:32,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-23 18:24:32,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:24:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:24:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 126 conjunts are in the unsatisfiable core [2022-02-23 18:24:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:24:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 137 proven. 236 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2022-02-23 18:24:33,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:24:34,353 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:24:35,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:24:35,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556851387] [2022-02-23 18:24:35,629 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:24:35,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646342715] [2022-02-23 18:24:35,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646342715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:24:35,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:24:35,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-02-23 18:24:35,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617753077] [2022-02-23 18:24:35,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:24:35,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:24:35,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:24:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:24:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-02-23 18:24:35,630 INFO L87 Difference]: Start difference. First operand 2677 states and 4325 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-23 18:24:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:24:40,866 INFO L93 Difference]: Finished difference Result 2965 states and 4766 transitions. [2022-02-23 18:24:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 18:24:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) Word has length 168 [2022-02-23 18:24:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:24:40,888 INFO L225 Difference]: With dead ends: 2965 [2022-02-23 18:24:40,888 INFO L226 Difference]: Without dead ends: 2960 [2022-02-23 18:24:40,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 18:24:40,889 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 103 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:24:40,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1117 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-23 18:24:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2022-02-23 18:24:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2908. [2022-02-23 18:24:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 1396 states have (on average 1.3173352435530086) internal successors, (1839), 1429 states have internal predecessors, (1839), 1432 states have call successors, (1432), 80 states have call predecessors, (1432), 79 states have return successors, (1430), 1398 states have call predecessors, (1430), 1430 states have call successors, (1430) [2022-02-23 18:24:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4701 transitions. [2022-02-23 18:24:40,944 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4701 transitions. Word has length 168 [2022-02-23 18:24:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:24:40,944 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4701 transitions. [2022-02-23 18:24:40,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-23 18:24:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4701 transitions. [2022-02-23 18:24:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-23 18:24:40,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:24:40,947 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:24:40,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-23 18:24:41,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-23 18:24:41,164 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:24:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:24:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1392511031, now seen corresponding path program 9 times [2022-02-23 18:24:41,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:24:41,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473725229] [2022-02-23 18:24:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:24:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:24:41,173 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:24:41,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704920136] [2022-02-23 18:24:41,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:24:41,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:24:41,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:24:41,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:24:41,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-23 18:24:42,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 18:24:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:24:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 112 conjunts are in the unsatisfiable core [2022-02-23 18:24:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:24:43,254 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:24:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 151 proven. 183 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2022-02-23 18:24:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:25:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 203 proven. 34 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2022-02-23 18:25:08,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:25:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473725229] [2022-02-23 18:25:08,922 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:25:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704920136] [2022-02-23 18:25:08,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704920136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:25:08,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:25:08,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16] total 42 [2022-02-23 18:25:08,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246142124] [2022-02-23 18:25:08,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:25:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-23 18:25:08,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:25:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-23 18:25:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 18:25:08,924 INFO L87 Difference]: Start difference. First operand 2908 states and 4701 transitions. Second operand has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (43), 13 states have call predecessors, (43), 15 states have call successors, (43) [2022-02-23 18:25:25,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:26:02,492 WARN L232 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:26:28,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:26:44,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:26:59,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:27:31,501 WARN L232 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 102 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:27:49,936 WARN L232 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 112 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:28:07,357 WARN L232 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 93 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)