/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 18:26:16,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 18:26:16,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 18:26:16,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 18:26:16,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 18:26:16,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 18:26:16,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 18:26:16,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 18:26:16,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 18:26:16,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 18:26:16,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 18:26:16,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 18:26:16,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 18:26:16,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 18:26:16,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 18:26:16,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 18:26:16,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 18:26:16,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 18:26:16,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 18:26:16,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 18:26:16,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 18:26:16,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 18:26:16,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 18:26:16,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 18:26:16,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 18:26:16,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 18:26:16,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 18:26:16,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 18:26:16,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-14 18:26:16,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 18:26:16,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 18:26:16,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 18:26:16,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 18:26:16,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 18:26:16,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 18:26:16,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 18:26:16,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 18:26:16,665 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 18:26:16,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 18:26:16,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 18:26:16,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 18:26:16,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 18:26:16,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 18:26:16,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 18:26:16,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 18:26:16,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 18:26:16,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 18:26:16,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 18:26:16,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:26:16,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 18:26:16,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 18:26:16,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 18:26:16,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 18:26:16,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 18:26:16,669 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 18:26:16,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 18:26:16,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 18:26:16,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 18:26:16,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 18:26:16,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 18:26:16,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 18:26:16,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 18:26:16,944 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 18:26:16,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-02-14 18:26:17,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7193e2cb1/2c77f4cbc2ba48d1a08a022d4eab23b7/FLAG9ca72ba72 [2022-02-14 18:26:17,342 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 18:26:17,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-02-14 18:26:17,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7193e2cb1/2c77f4cbc2ba48d1a08a022d4eab23b7/FLAG9ca72ba72 [2022-02-14 18:26:17,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7193e2cb1/2c77f4cbc2ba48d1a08a022d4eab23b7 [2022-02-14 18:26:17,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 18:26:17,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 18:26:17,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 18:26:17,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 18:26:17,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 18:26:17,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd18b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17, skipping insertion in model container [2022-02-14 18:26:17,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 18:26:17,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 18:26:17,542 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/hard-u_unwindbound5.c[537,550] [2022-02-14 18:26:17,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:26:17,586 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 18:26:17,596 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/hard-u_unwindbound5.c[537,550] [2022-02-14 18:26:17,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:26:17,613 INFO L208 MainTranslator]: Completed translation [2022-02-14 18:26:17,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17 WrapperNode [2022-02-14 18:26:17,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 18:26:17,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 18:26:17,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 18:26:17,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 18:26:17,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 18:26:17,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 18:26:17,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 18:26:17,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 18:26:17,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (1/1) ... [2022-02-14 18:26:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:26:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:17,701 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) [2022-02-14 18:26:17,728 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 [2022-02-14 18:26:17,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 18:26:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 18:26:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 18:26:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 18:26:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 18:26:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 18:26:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 18:26:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 18:26:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 18:26:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 18:26:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 18:26:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 18:26:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 18:26:17,801 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 18:26:17,802 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 18:26:17,914 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 18:26:17,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 18:26:17,920 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 18:26:17,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:26:17 BoogieIcfgContainer [2022-02-14 18:26:17,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 18:26:17,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 18:26:17,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 18:26:17,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 18:26:17,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 06:26:17" (1/3) ... [2022-02-14 18:26:17,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acd1fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:26:17, skipping insertion in model container [2022-02-14 18:26:17,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:26:17" (2/3) ... [2022-02-14 18:26:17,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acd1fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:26:17, skipping insertion in model container [2022-02-14 18:26:17,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:26:17" (3/3) ... [2022-02-14 18:26:17,929 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2022-02-14 18:26:17,933 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 18:26:17,934 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 18:26:17,973 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 18:26:17,978 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-02-14 18:26:17,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 18:26:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 18:26:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 18:26:17,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:17,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:18,000 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-02-14 18:26:18,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:18,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027627528] [2022-02-14 18:26:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:26:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:26:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 18:26:18,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:18,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027627528] [2022-02-14 18:26:18,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027627528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:18,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:18,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 18:26:18,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710583393] [2022-02-14 18:26:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:18,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 18:26:18,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 18:26:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 18:26:18,346 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 18:26:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:18,481 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-02-14 18:26:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 18:26:18,484 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 18:26:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:18,494 INFO L225 Difference]: With dead ends: 66 [2022-02-14 18:26:18,494 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 18:26:18,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 18:26:18,504 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:18,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:26:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 18:26:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-14 18:26:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 18:26:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-14 18:26:18,561 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-14 18:26:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:18,562 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-14 18:26:18,563 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 18:26:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-14 18:26:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 18:26:18,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:18,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:18,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 18:26:18,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-02-14 18:26:18,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:18,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047960013] [2022-02-14 18:26:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:26:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:26:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 18:26:18,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:18,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047960013] [2022-02-14 18:26:18,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047960013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:18,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:18,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 18:26:18,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121413871] [2022-02-14 18:26:18,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:18,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:26:18,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:26:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:26:18,729 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 18:26:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:18,887 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-14 18:26:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 18:26:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 18:26:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:18,888 INFO L225 Difference]: With dead ends: 47 [2022-02-14 18:26:18,888 INFO L226 Difference]: Without dead ends: 45 [2022-02-14 18:26:18,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 18:26:18,890 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:18,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:26:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-14 18:26:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-14 18:26:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 18:26:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-14 18:26:18,900 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-14 18:26:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:18,900 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-14 18:26:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 18:26:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-14 18:26:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 18:26:18,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:18,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:18,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 18:26:18,902 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-02-14 18:26:18,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:18,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047320650] [2022-02-14 18:26:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:18,915 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:18,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939220857] [2022-02-14 18:26:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:18,919 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) [2022-02-14 18:26:18,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 18:26:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 18:26:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 18:26:19,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:26:19,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:19,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047320650] [2022-02-14 18:26:19,077 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:19,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939220857] [2022-02-14 18:26:19,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939220857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:19,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:19,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 18:26:19,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269044473] [2022-02-14 18:26:19,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:19,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 18:26:19,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 18:26:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 18:26:19,080 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 18:26:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:19,093 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-14 18:26:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 18:26:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-14 18:26:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:19,094 INFO L225 Difference]: With dead ends: 52 [2022-02-14 18:26:19,094 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 18:26:19,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 18:26:19,096 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:19,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:26:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 18:26:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-14 18:26:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 18:26:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-14 18:26:19,103 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-14 18:26:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:19,104 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-14 18:26:19,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 18:26:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-14 18:26:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 18:26:19,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:19,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:19,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:19,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:19,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-02-14 18:26:19,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:19,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538328842] [2022-02-14 18:26:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:19,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:26:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:19,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:26:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:19,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 18:26:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 18:26:19,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:19,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538328842] [2022-02-14 18:26:19,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538328842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:19,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:19,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 18:26:19,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180553127] [2022-02-14 18:26:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:26:19,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:26:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:26:19,439 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:26:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:19,620 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-14 18:26:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 18:26:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 18:26:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:19,623 INFO L225 Difference]: With dead ends: 52 [2022-02-14 18:26:19,623 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 18:26:19,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 18:26:19,638 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:19,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:26:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 18:26:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-14 18:26:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 18:26:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-14 18:26:19,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-14 18:26:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:19,654 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-14 18:26:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:26:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-14 18:26:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 18:26:19,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:19,660 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:19,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 18:26:19,661 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-02-14 18:26:19,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:19,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133988021] [2022-02-14 18:26:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:19,699 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:19,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808906957] [2022-02-14 18:26:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:19,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:19,704 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) [2022-02-14 18:26:19,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 18:26:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 18:26:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:26:19,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:26:19,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:19,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133988021] [2022-02-14 18:26:19,862 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:19,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808906957] [2022-02-14 18:26:19,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808906957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:19,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:19,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 18:26:19,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157807184] [2022-02-14 18:26:19,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:19,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 18:26:19,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 18:26:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 18:26:19,865 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 18:26:21,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 18:26:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:22,117 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-02-14 18:26:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:26:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 18:26:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:22,120 INFO L225 Difference]: With dead ends: 59 [2022-02-14 18:26:22,120 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 18:26:22,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:26:22,121 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:22,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 18:26:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 18:26:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-14 18:26:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 18:26:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-02-14 18:26:22,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-02-14 18:26:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:22,139 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-02-14 18:26:22,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 18:26:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-02-14 18:26:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 18:26:22,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:22,148 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 18:26:22,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:22,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:22,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-02-14 18:26:22,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:22,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104729269] [2022-02-14 18:26:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:22,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:22,375 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:22,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833913365] [2022-02-14 18:26:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:22,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:22,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:22,377 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) [2022-02-14 18:26:22,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 18:26:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 18:26:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:26:22,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:26:22,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:22,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104729269] [2022-02-14 18:26:22,601 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:22,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833913365] [2022-02-14 18:26:22,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833913365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:22,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:22,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 18:26:22,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591225693] [2022-02-14 18:26:22,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:22,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 18:26:22,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 18:26:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 18:26:22,603 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 18:26:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:22,649 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-02-14 18:26:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:26:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-14 18:26:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:22,650 INFO L225 Difference]: With dead ends: 76 [2022-02-14 18:26:22,650 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 18:26:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 18:26:22,651 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:26:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 18:26:22,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-14 18:26:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 18:26:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-02-14 18:26:22,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-02-14 18:26:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:22,662 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-02-14 18:26:22,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 18:26:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-02-14 18:26:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 18:26:22,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:22,663 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 18:26:22,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:22,876 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-02-14 18:26:22,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:22,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441960042] [2022-02-14 18:26:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:22,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:22,887 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:22,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939720720] [2022-02-14 18:26:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:22,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:22,889 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) [2022-02-14 18:26:22,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 18:26:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 18:26:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:26:23,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:26:23,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441960042] [2022-02-14 18:26:23,204 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939720720] [2022-02-14 18:26:23,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939720720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:26:23,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:26:23,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 18:26:23,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382932596] [2022-02-14 18:26:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:26:23,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:26:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:26:23,206 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 18:26:25,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 18:26:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:25,520 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-02-14 18:26:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 18:26:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-14 18:26:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:25,523 INFO L225 Difference]: With dead ends: 82 [2022-02-14 18:26:25,524 INFO L226 Difference]: Without dead ends: 79 [2022-02-14 18:26:25,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 18:26:25,525 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:25,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 191 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 18:26:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-14 18:26:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-14 18:26:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 18:26:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-02-14 18:26:25,535 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-02-14 18:26:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:25,535 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-02-14 18:26:25,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 18:26:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-02-14 18:26:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 18:26:25,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:25,536 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-14 18:26:25,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:25,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:25,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2022-02-14 18:26:25,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:25,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226786545] [2022-02-14 18:26:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:25,766 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:25,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393481783] [2022-02-14 18:26:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:25,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:25,780 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) [2022-02-14 18:26:25,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 18:26:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 18:26:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:26:25,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:26:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:26:26,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:26,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226786545] [2022-02-14 18:26:26,118 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:26,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393481783] [2022-02-14 18:26:26,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393481783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:26:26,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:26:26,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 18:26:26,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21513840] [2022-02-14 18:26:26,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:26:26,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 18:26:26,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 18:26:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 18:26:26,120 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 18:26:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:26,305 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-02-14 18:26:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 18:26:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-14 18:26:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:26,308 INFO L225 Difference]: With dead ends: 160 [2022-02-14 18:26:26,308 INFO L226 Difference]: Without dead ends: 146 [2022-02-14 18:26:26,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 18:26:26,309 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:26,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:26:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-14 18:26:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-02-14 18:26:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 18:26:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-02-14 18:26:26,328 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-02-14 18:26:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:26,328 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-02-14 18:26:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 18:26:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-02-14 18:26:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-14 18:26:26,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:26,330 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:26:26,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:26,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:26,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-02-14 18:26:26,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:26,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48347875] [2022-02-14 18:26:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:26,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:26,563 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:26,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625264825] [2022-02-14 18:26:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:26,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:26,569 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) [2022-02-14 18:26:26,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 18:26:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 18:26:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 18:26:27,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:26:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 18:26:27,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:27,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48347875] [2022-02-14 18:26:27,348 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:27,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625264825] [2022-02-14 18:26:27,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625264825] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 18:26:27,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 18:26:27,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 18:26:27,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681875533] [2022-02-14 18:26:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:26:27,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:26:27,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:26:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 18:26:27,350 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 18:26:29,420 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 [] [2022-02-14 18:26:31,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 18:26:33,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 18:26:35,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 18:26:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:35,927 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-02-14 18:26:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:26:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-02-14 18:26:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:35,930 INFO L225 Difference]: With dead ends: 162 [2022-02-14 18:26:35,930 INFO L226 Difference]: Without dead ends: 160 [2022-02-14 18:26:35,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 18:26:35,931 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 4 Unknown, 0 Unchecked, 8.5s Time] [2022-02-14 18:26:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-14 18:26:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-02-14 18:26:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 18:26:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-02-14 18:26:35,954 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-02-14 18:26:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:35,955 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-02-14 18:26:35,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 18:26:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-02-14 18:26:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 18:26:35,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:35,956 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-02-14 18:26:35,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:36,168 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2022-02-14 18:26:36,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:36,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100370473] [2022-02-14 18:26:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:36,178 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:36,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976581046] [2022-02-14 18:26:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:36,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:36,180 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) [2022-02-14 18:26:36,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 18:26:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:26:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 18:26:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:26:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 18:26:36,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:26:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 18:26:36,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:26:36,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100370473] [2022-02-14 18:26:36,597 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:26:36,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976581046] [2022-02-14 18:26:36,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976581046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:26:36,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:26:36,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-14 18:26:36,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401727240] [2022-02-14 18:26:36,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:26:36,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 18:26:36,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:26:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 18:26:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-14 18:26:36,599 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-14 18:26:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:26:36,846 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2022-02-14 18:26:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 18:26:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 50 [2022-02-14 18:26:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:26:36,849 INFO L225 Difference]: With dead ends: 234 [2022-02-14 18:26:36,849 INFO L226 Difference]: Without dead ends: 210 [2022-02-14 18:26:36,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-14 18:26:36,850 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 18:26:36,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 286 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 18:26:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-14 18:26:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2022-02-14 18:26:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 141 states have internal predecessors, (157), 47 states have call successors, (47), 26 states have call predecessors, (47), 25 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-14 18:26:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2022-02-14 18:26:36,871 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 50 [2022-02-14 18:26:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:26:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2022-02-14 18:26:36,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-14 18:26:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2022-02-14 18:26:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 18:26:36,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:26:36,880 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2022-02-14 18:26:36,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 18:26:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:37,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:26:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:26:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash -397308229, now seen corresponding path program 1 times [2022-02-14 18:26:37,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:26:37,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879826079] [2022-02-14 18:26:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:26:37,115 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:26:37,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058369970] [2022-02-14 18:26:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:26:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:26:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:26:37,116 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) [2022-02-14 18:26:37,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process