/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-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 12:24:48,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 12:24:48,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 12:24:48,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 12:24:48,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 12:24:48,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 12:24:48,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 12:24:48,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 12:24:48,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 12:24:48,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 12:24:48,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 12:24:48,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 12:24:48,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 12:24:48,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 12:24:48,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 12:24:48,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 12:24:48,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 12:24:48,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 12:24:48,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 12:24:48,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 12:24:48,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 12:24:48,296 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 [2022-03-17 12:24:48,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 12:24:48,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 12:24:48,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 12:24:48,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 12:24:48,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 12:24:48,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 12:24:48,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 12:24:48,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 12:24:48,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 12:24:48,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 12:24:48,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 12:24:48,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 12:24:48,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 12:24:48,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 12:24:48,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 12:24:48,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 12:24:48,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 12:24:48,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 12:24:48,589 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 12:24:48,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2022-03-17 12:24:48,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be294ff56/f798866e69ce4f9696d66bb7b274044e/FLAG3a233bc45 [2022-03-17 12:24:48,991 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 12:24:48,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2022-03-17 12:24:48,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be294ff56/f798866e69ce4f9696d66bb7b274044e/FLAG3a233bc45 [2022-03-17 12:24:49,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be294ff56/f798866e69ce4f9696d66bb7b274044e [2022-03-17 12:24:49,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 12:24:49,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 12:24:49,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 12:24:49,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 12:24:49,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 12:24:49,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48393616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49, skipping insertion in model container [2022-03-17 12:24:49,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 12:24:49,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 12:24:49,560 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-ll_valuebound50.c[538,551] [2022-03-17 12:24:49,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 12:24:49,605 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 12:24:49,612 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-ll_valuebound50.c[538,551] [2022-03-17 12:24:49,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 12:24:49,635 INFO L208 MainTranslator]: Completed translation [2022-03-17 12:24:49,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49 WrapperNode [2022-03-17 12:24:49,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 12:24:49,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 12:24:49,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 12:24:49,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 12:24:49,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 12:24:49,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 12:24:49,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 12:24:49,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 12:24:49,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (1/1) ... [2022-03-17 12:24:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 12:24:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:49,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 12:24:49,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 12:24:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 12:24:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 12:24:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 12:24:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 12:24:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 12:24:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 12:24:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 12:24:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 12:24:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 12:24:49,807 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 12:24:49,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 12:24:49,889 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 12:24:49,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 12:24:49,893 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 12:24:49,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 12:24:49 BoogieIcfgContainer [2022-03-17 12:24:49,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 12:24:49,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 12:24:49,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 12:24:49,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 12:24:49,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 12:24:49" (1/3) ... [2022-03-17 12:24:49,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55730a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:24:49, skipping insertion in model container [2022-03-17 12:24:49,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:24:49" (2/3) ... [2022-03-17 12:24:49,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55730a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:24:49, skipping insertion in model container [2022-03-17 12:24:49,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 12:24:49" (3/3) ... [2022-03-17 12:24:49,899 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2022-03-17 12:24:49,902 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 12:24:49,902 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 12:24:49,941 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 12:24:49,947 INFO L340 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 [2022-03-17 12:24:49,947 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 12:24:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 12:24:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 12:24:49,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:49,968 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:49,968 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-17 12:24:49,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:49,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17454372] [2022-03-17 12:24:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:24:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:24:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:24:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:24:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:24:50,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:50,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17454372] [2022-03-17 12:24:50,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17454372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:24:50,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:24:50,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 12:24:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666336250] [2022-03-17 12:24:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:50,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 12:24:50,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 12:24:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 12:24:50,173 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 12:24:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:50,226 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-17 12:24:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 12:24:50,228 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 12:24:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:50,233 INFO L225 Difference]: With dead ends: 69 [2022-03-17 12:24:50,233 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 12:24:50,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 12:24:50,237 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:50,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 12:24:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 12:24:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-17 12:24:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:24:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-17 12:24:50,260 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-17 12:24:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:50,261 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-17 12:24:50,261 INFO L479 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 12:24:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-17 12:24:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 12:24:50,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:50,262 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:50,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 12:24:50,262 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-17 12:24:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032268765] [2022-03-17 12:24:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:24:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:24:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:24:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:24:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:24:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:50,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032268765] [2022-03-17 12:24:50,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032268765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:24:50,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:24:50,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 12:24:50,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827073882] [2022-03-17 12:24:50,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:50,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:24:50,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:24:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:24:50,341 INFO L87 Difference]: Start difference. First operand 33 states and 43 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 12:24:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:50,517 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-17 12:24:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 12:24:50,517 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 12:24:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:50,518 INFO L225 Difference]: With dead ends: 46 [2022-03-17 12:24:50,518 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 12:24:50,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:24:50,519 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:50,520 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:24:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 12:24:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 12:24:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:24:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 12:24:50,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-17 12:24:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:50,528 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 12:24:50,528 INFO L479 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 12:24:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 12:24:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 12:24:50,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:50,529 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-17 12:24:50,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 12:24:50,529 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-17 12:24:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384326551] [2022-03-17 12:24:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:24:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:24:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:24:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:24:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-17 12:24:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:24:50,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:50,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384326551] [2022-03-17 12:24:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384326551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:24:50,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:24:50,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 12:24:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143064779] [2022-03-17 12:24:50,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:50,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:24:50,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:24:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:24:50,635 INFO L87 Difference]: Start difference. First operand 37 states and 46 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 12:24:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:50,788 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-17 12:24:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 12:24:50,789 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 12:24:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:50,792 INFO L225 Difference]: With dead ends: 50 [2022-03-17 12:24:50,793 INFO L226 Difference]: Without dead ends: 48 [2022-03-17 12:24:50,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:24:50,796 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:50,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:24:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-17 12:24:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-17 12:24:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:24:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-17 12:24:50,811 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-17 12:24:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:50,811 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-17 12:24:50,812 INFO L479 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 12:24:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-17 12:24:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 12:24:50,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:50,821 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:50,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 12:24:50,821 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-17 12:24:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:50,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263586299] [2022-03-17 12:24:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:50,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:24:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547926302] [2022-03-17 12:24:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:50,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:24:50,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 12:24:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 12:24:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:24:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 12:24:51,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 12:24:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:51,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263586299] [2022-03-17 12:24:51,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:24:51,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547926302] [2022-03-17 12:24:51,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547926302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:24:51,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:24:51,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 12:24:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092041729] [2022-03-17 12:24:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:51,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 12:24:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 12:24:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 12:24:51,154 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 12:24:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:51,256 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-17 12:24:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 12:24:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-17 12:24:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:51,260 INFO L225 Difference]: With dead ends: 69 [2022-03-17 12:24:51,260 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 12:24:51,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:24:51,268 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:51,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:24:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 12:24:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 12:24:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 12:24:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-17 12:24:51,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-17 12:24:51,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:51,281 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-17 12:24:51,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 12:24:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-17 12:24:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 12:24:51,281 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:51,282 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-03-17 12:24:51,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 12:24:51,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:51,503 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-17 12:24:51,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455009954] [2022-03-17 12:24:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:51,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:24:51,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141155862] [2022-03-17 12:24:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:51,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:51,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:51,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:24:51,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 12:24:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 12:24:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:24:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 12:24:51,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:24:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 12:24:51,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:51,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455009954] [2022-03-17 12:24:51,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:24:51,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141155862] [2022-03-17 12:24:51,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141155862] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 12:24:51,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 12:24:51,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 12:24:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298858070] [2022-03-17 12:24:51,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:51,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:24:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:24:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:24:51,984 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:24:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:52,048 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-17 12:24:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:24:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-17 12:24:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:52,051 INFO L225 Difference]: With dead ends: 68 [2022-03-17 12:24:52,051 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 12:24:52,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 12:24:52,052 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:52,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 12:24:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 12:24:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-17 12:24:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 12:24:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-17 12:24:52,072 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-17 12:24:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:52,072 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-17 12:24:52,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:24:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-17 12:24:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 12:24:52,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:52,073 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:52,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 12:24:52,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:52,305 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:52,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-17 12:24:52,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:52,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945367414] [2022-03-17 12:24:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:52,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:52,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:24:52,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634921279] [2022-03-17 12:24:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:52,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:52,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:52,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:24:52,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 12:24:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 12:24:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:24:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-17 12:24:52,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:24:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-17 12:24:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945367414] [2022-03-17 12:24:52,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:24:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634921279] [2022-03-17 12:24:52,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634921279] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 12:24:52,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 12:24:52,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 12:24:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133370006] [2022-03-17 12:24:52,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:52,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 12:24:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 12:24:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:24:52,679 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:24:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:52,834 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-17 12:24:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:24:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-17 12:24:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:52,835 INFO L225 Difference]: With dead ends: 76 [2022-03-17 12:24:52,835 INFO L226 Difference]: Without dead ends: 74 [2022-03-17 12:24:52,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:24:52,836 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:52,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:24:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-17 12:24:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-17 12:24:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 12:24:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-17 12:24:52,854 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-17 12:24:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:52,854 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-17 12:24:52,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:24:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-17 12:24:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 12:24:52,855 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:52,855 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:52,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 12:24:53,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:53,087 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-17 12:24:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:53,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120841086] [2022-03-17 12:24:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:53,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:53,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:24:53,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255787725] [2022-03-17 12:24:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:53,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:24:53,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 12:24:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 12:24:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:24:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 12:24:53,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 12:24:53,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:24:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120841086] [2022-03-17 12:24:53,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:24:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255787725] [2022-03-17 12:24:53,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255787725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:24:53,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:24:53,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 12:24:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809027716] [2022-03-17 12:24:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:24:53,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 12:24:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:24:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 12:24:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:24:53,285 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 12:24:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:24:53,330 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-17 12:24:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:24:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-17 12:24:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:24:53,332 INFO L225 Difference]: With dead ends: 79 [2022-03-17 12:24:53,332 INFO L226 Difference]: Without dead ends: 72 [2022-03-17 12:24:53,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:24:53,333 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:24:53,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 12:24:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-17 12:24:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-17 12:24:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 12:24:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-17 12:24:53,341 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-17 12:24:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:24:53,341 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-17 12:24:53,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 12:24:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-17 12:24:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 12:24:53,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:24:53,343 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:24:53,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 12:24:53,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:53,559 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:24:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:24:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-17 12:24:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:24:53,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29440719] [2022-03-17 12:24:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:53,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:24:53,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:24:53,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471539026] [2022-03-17 12:24:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:24:53,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:24:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:24:53,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:24:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 12:24:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:24:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 12:24:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:24:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-17 12:24:54,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:25:26,934 WARN L232 SmtUtils]: Spent 22.00s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:26:25,252 WARN L232 SmtUtils]: Spent 14.23s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:27:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-17 12:27:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:27:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29440719] [2022-03-17 12:27:24,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:27:24,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471539026] [2022-03-17 12:27:24,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471539026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:27:24,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:27:24,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-03-17 12:27:24,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27559575] [2022-03-17 12:27:24,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:27:24,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 12:27:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:27:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 12:27:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-17 12:27:24,660 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-17 12:27:26,692 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 [] [2022-03-17 12:27:28,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:27:30,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:27:39,731 WARN L232 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:27:46,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:27:48,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:27:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:27:50,826 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2022-03-17 12:27:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 12:27:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-03-17 12:27:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:27:50,827 INFO L225 Difference]: With dead ends: 142 [2022-03-17 12:27:50,827 INFO L226 Difference]: Without dead ends: 115 [2022-03-17 12:27:50,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-17 12:27:50,828 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 128 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-03-17 12:27:50,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 275 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 363 Invalid, 4 Unknown, 0 Unchecked, 12.7s Time] [2022-03-17 12:27:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-17 12:27:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-03-17 12:27:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 12:27:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-17 12:27:50,838 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-03-17 12:27:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:27:50,839 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-17 12:27:50,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-17 12:27:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-17 12:27:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 12:27:50,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:27:50,840 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:27:50,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 12:27:51,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:51,058 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:27:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:27:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-17 12:27:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:27:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501213034] [2022-03-17 12:27:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:27:51,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:27:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956359617] [2022-03-17 12:27:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:27:51,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:27:51,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 12:27:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:27:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 12:27:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:27:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-17 12:27:51,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:27:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-17 12:27:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:27:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501213034] [2022-03-17 12:27:51,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:27:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956359617] [2022-03-17 12:27:51,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956359617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:27:51,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:27:51,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-17 12:27:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991088366] [2022-03-17 12:27:51,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:27:51,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 12:27:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:27:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 12:27:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-17 12:27:51,632 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 12:27:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:27:51,750 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-03-17 12:27:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 12:27:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-17 12:27:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:27:51,752 INFO L225 Difference]: With dead ends: 116 [2022-03-17 12:27:51,752 INFO L226 Difference]: Without dead ends: 114 [2022-03-17 12:27:51,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:27:51,753 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:27:51,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:27:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-17 12:27:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-03-17 12:27:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-17 12:27:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-03-17 12:27:51,766 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-03-17 12:27:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:27:51,766 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-03-17 12:27:51,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 12:27:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-03-17 12:27:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 12:27:51,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:27:51,772 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:27:51,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 12:27:51,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:51,987 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:27:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:27:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1353450239, now seen corresponding path program 2 times [2022-03-17 12:27:51,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:27:51,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022926693] [2022-03-17 12:27:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:27:51,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:27:51,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116645489] [2022-03-17 12:27:51,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 12:27:51,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:51,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:27:52,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:27:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 12:27:52,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 12:27:52,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 12:27:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 12:27:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:27:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-17 12:27:52,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:27:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-17 12:27:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:27:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022926693] [2022-03-17 12:27:52,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:27:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116645489] [2022-03-17 12:27:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116645489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:27:52,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:27:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-17 12:27:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339290792] [2022-03-17 12:27:52,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:27:52,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 12:27:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:27:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 12:27:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:27:52,275 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-17 12:27:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:27:52,308 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-17 12:27:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 12:27:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-03-17 12:27:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:27:52,314 INFO L225 Difference]: With dead ends: 130 [2022-03-17 12:27:52,314 INFO L226 Difference]: Without dead ends: 111 [2022-03-17 12:27:52,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:27:52,315 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:27:52,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 12:27:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-17 12:27:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-17 12:27:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 12:27:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-03-17 12:27:52,336 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-03-17 12:27:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:27:52,337 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-03-17 12:27:52,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-17 12:27:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-03-17 12:27:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 12:27:52,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:27:52,339 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:27:52,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 12:27:52,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:52,554 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:27:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:27:52,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1550260511, now seen corresponding path program 1 times [2022-03-17 12:27:52,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:27:52,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266380695] [2022-03-17 12:27:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:27:52,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:27:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110699649] [2022-03-17 12:27:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:52,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:52,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:27:52,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:27:52,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 12:27:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:27:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 12:27:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:27:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-17 12:27:52,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:27:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-17 12:27:53,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:27:53,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266380695] [2022-03-17 12:27:53,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:27:53,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110699649] [2022-03-17 12:27:53,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110699649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:27:53,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:27:53,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-17 12:27:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143991907] [2022-03-17 12:27:53,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:27:53,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 12:27:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:27:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 12:27:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:27:53,119 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 12:27:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:27:53,334 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2022-03-17 12:27:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 12:27:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-17 12:27:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:27:53,335 INFO L225 Difference]: With dead ends: 119 [2022-03-17 12:27:53,335 INFO L226 Difference]: Without dead ends: 102 [2022-03-17 12:27:53,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 12:27:53,336 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 12:27:53,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 325 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 12:27:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-17 12:27:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-17 12:27:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 12:27:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-17 12:27:53,346 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-03-17 12:27:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:27:53,346 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-17 12:27:53,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 12:27:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-17 12:27:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-17 12:27:53,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:27:53,347 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:27:53,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 12:27:53,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 12:27:53,564 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:27:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:27:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -941589367, now seen corresponding path program 1 times [2022-03-17 12:27:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:27:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886093524] [2022-03-17 12:27:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:27:53,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:27:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153281746] [2022-03-17 12:27:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:27:53,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:27:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 12:27:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:27:53,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 12:27:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:27:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-17 12:27:53,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 12:27:53,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:27:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886093524] [2022-03-17 12:27:53,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:27:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153281746] [2022-03-17 12:27:53,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153281746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:27:53,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:27:53,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 12:27:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040662360] [2022-03-17 12:27:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:27:53,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 12:27:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:27:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 12:27:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:27:53,781 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-17 12:27:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:27:53,817 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-03-17 12:27:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:27:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-03-17 12:27:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:27:53,818 INFO L225 Difference]: With dead ends: 116 [2022-03-17 12:27:53,818 INFO L226 Difference]: Without dead ends: 104 [2022-03-17 12:27:53,819 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:27:53,819 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:27:53,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 12:27:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-17 12:27:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-17 12:27:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 12:27:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-03-17 12:27:53,827 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-03-17 12:27:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:27:53,827 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-03-17 12:27:53,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-17 12:27:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-03-17 12:27:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-17 12:27:53,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:27:53,828 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:27:53,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 12:27:54,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:54,044 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:27:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:27:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 3 times [2022-03-17 12:27:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:27:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533352093] [2022-03-17 12:27:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:27:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:27:54,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:27:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463589717] [2022-03-17 12:27:54,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 12:27:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:27:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:27:54,055 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:27:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 12:27:54,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 12:27:54,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 12:27:54,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 12:27:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:27:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-17 12:27:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:28:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-17 12:28:47,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:28:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533352093] [2022-03-17 12:28:47,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:28:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463589717] [2022-03-17 12:28:47,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463589717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:28:47,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:28:47,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-17 12:28:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204338112] [2022-03-17 12:28:47,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:28:47,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 12:28:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:28:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 12:28:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=417, Unknown=4, NotChecked=0, Total=506 [2022-03-17 12:28:47,641 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-17 12:30:10,784 WARN L232 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:30:13,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:32:14,544 WARN L232 SmtUtils]: Spent 1.98m on a formula simplification. DAG size of input: 172 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:32:17,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:33:22,005 WARN L232 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 195 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:33:24,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:33:26,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:33:28,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:33:36,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:34:59,107 WARN L232 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 181 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:35:13,293 WARN L232 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 85 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:35:21,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:23,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:26,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:32,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:37,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:39,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 12:35:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:35:40,176 INFO L93 Difference]: Finished difference Result 237 states and 310 transitions. [2022-03-17 12:35:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-17 12:35:40,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-03-17 12:35:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:35:40,178 INFO L225 Difference]: With dead ends: 237 [2022-03-17 12:35:40,178 INFO L226 Difference]: Without dead ends: 184 [2022-03-17 12:35:40,178 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 391.0s TimeCoverageRelationStatistics Valid=282, Invalid=1353, Unknown=5, NotChecked=0, Total=1640 [2022-03-17 12:35:40,179 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 128 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 289 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time [2022-03-17 12:35:40,179 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 550 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 875 Invalid, 10 Unknown, 0 Unchecked, 38.0s Time] [2022-03-17 12:35:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-17 12:35:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2022-03-17 12:35:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 96 states have (on average 1.125) internal successors, (108), 103 states have internal predecessors, (108), 46 states have call successors, (46), 19 states have call predecessors, (46), 18 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-17 12:35:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2022-03-17 12:35:40,194 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 105 [2022-03-17 12:35:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:35:40,194 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2022-03-17 12:35:40,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-17 12:35:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2022-03-17 12:35:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-17 12:35:40,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:35:40,195 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:35:40,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-17 12:35:40,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 12:35:40,396 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:35:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:35:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 2 times [2022-03-17 12:35:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:35:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206025729] [2022-03-17 12:35:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:35:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:35:40,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:35:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113937011] [2022-03-17 12:35:40,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 12:35:40,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:35:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:35:40,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:35:40,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 12:35:40,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 12:35:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 12:35:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-17 12:35:40,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:35:41,337 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 12:35:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-17 12:35:41,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:35:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-17 12:35:42,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:35:42,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206025729] [2022-03-17 12:35:42,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:35:42,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113937011] [2022-03-17 12:35:42,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113937011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:35:42,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:35:42,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-17 12:35:42,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120389637] [2022-03-17 12:35:42,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:35:42,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 12:35:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:35:42,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 12:35:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-17 12:35:42,383 INFO L87 Difference]: Start difference. First operand 161 states and 198 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 12:35:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:35:43,361 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-03-17 12:35:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 12:35:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-03-17 12:35:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:35:43,363 INFO L225 Difference]: With dead ends: 228 [2022-03-17 12:35:43,363 INFO L226 Difference]: Without dead ends: 159 [2022-03-17 12:35:43,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-17 12:35:43,364 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 38 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 12:35:43,364 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 405 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 12:35:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-17 12:35:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2022-03-17 12:35:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 89 states have internal predecessors, (93), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 12:35:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2022-03-17 12:35:43,391 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 116 [2022-03-17 12:35:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:35:43,391 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2022-03-17 12:35:43,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 12:35:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2022-03-17 12:35:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-17 12:35:43,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:35:43,392 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:35:43,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-17 12:35:43,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 12:35:43,613 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:35:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:35:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 4 times [2022-03-17 12:35:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:35:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459890945] [2022-03-17 12:35:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:35:43,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:35:43,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:35:43,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823326689] [2022-03-17 12:35:43,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 12:35:43,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:35:43,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:35:43,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 12:35:43,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 12:35:43,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 12:35:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 12:35:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-17 12:35:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:35:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-17 12:35:44,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:36:10,642 WARN L232 SmtUtils]: Spent 6.75s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 12:38:04,417 WARN L232 SmtUtils]: Spent 31.93s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)